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Hans-Bodo Lüngen (Director Technology VDEh)25/09/2018, 09:05The blast furnace is worldwide the dominant metallic product supplier for crude steel production. It has reached an extreme high technological standard with large efficiency and low reductant rates. Independently from the fact that the blast furnace has nearly reached its theoretical minimum in energy consumption it enables the operators a wide range of operation modes with a high flexibility....Go to contribution page
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Dr Koji Saito (Nippon Steel & Sumitomo Metals Corporation)25/09/2018, 09:35The last decade was a turbulent for the steel industry. The reorganization of steel industry across borders has progressed and the increased demand for steel products has made the price of raw materials such as iron ore and metallurgical coal more volatile than ever. Ironmaking technology division in NSSMC has been exposed to global competition and has tried to cope with these changes and to...Go to contribution page
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Dr Yakov Gordon (GTechnical Director, I & S. Hatch)25/09/2018, 10:45Intensive operation of blast furnace allows increase in production of hot metal. However, furnace life could be sacrificed. CherMK and Hatch systematically monitor conditions of BF lining using Acousto Ultrasonic-Echo (AU-E) non-destructive methodology. Testing of blast furnaces revealed problematic areas with refractory deterioration, formation of elephant foot, extent of accretion and rate...Go to contribution page
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Dr David Jenkins (University of Newcastle)25/09/2018, 10:45In recent years we have conducted integrated mechanistic studies to understand the structures controlling coke strength and how these structures form in the plastic layer. These have involved micro CT studies of coke structures and calculation of the response of these structures to stress as well as fractographic studies of fracture surfaces in coke. A number of studies have identified that...Go to contribution page
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Gilles KASS (Paul Wurth S.A.)25/09/2018, 10:45Cooling of hot sinter involves the release of significant quantities of energy and is a source of fugitive dust emissions. The increasing pressure that steel producers are facing in regard to energy consumption, reduction of CO2 and air emissions, require new processes and technologies to maximise energy recovery of the sinter cooling and to lower its environmental impact. Paul Wurth has been...Go to contribution page
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Mr ARUNKUMAR CHELLADURAI (Tata Steel), Mr SRINIVASA REDDY ASADI (Tata Steel)25/09/2018, 10:45Tata Steel Kalinganagar is a green field 3MTPA integrated steel plant operating via the BF-BOF route. The sinter plant at Tata Steel Kalinganagar was commissioned in January 2016. The sintering machine area is 496m2 with state-of-the-art cooler design and advanced high intensity mixing-granulation systems. Among the challenges faced in the ramp up, two key issues that were of major concern in...Go to contribution page
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Dr MYOUNG KYUN SHIN (Ironmaking research group, Pohang Research Lab., POSCO)25/09/2018, 11:05The energy recovery system for FINEX® has been developed and adopted with commercial scale to the No.3 FINEX® plant at POSCO’s Pohang Works. The energy recovery system is composed of heat recovery steam generator, dry de-dusting, and expansion turbine–driven power generator, which are optimally configured with adjusting the balance between system efficiency and the process restrictions. For...Go to contribution page
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Mr Koji Osuga (Kobe Steel, Ltd.)25/09/2018, 11:05Kakogawa Works of Kobe Steel, Ltd. has a set of sinter and pellet plants for the production of blast furnace raw materials. Recently, the use of magnetite fine ore has attracted attention while deterioration of iron ore grade. We clarified the problem of granulation and firing in using large quantity of magnetite fine ore, and developed countermeasures.Go to contribution page
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Lauren NORTH (School of Engineering, Newcastle Institute for Energy and Resources, University of Newcastle)25/09/2018, 11:05Tribological and scratch testing techniques were applied to metallurgical coke samples to determine (1) the abrasive strengths of the coke microtextural constituents, and (2) the strength of the interfaces between the inertinite maceral derived components (IMDC) and the reactive maceral derived components (RMDC), as a function of the properties of the parent coal(s). These parameters were...Go to contribution page
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Dr Anrin Bhattacharyya (Montanuniversitaet Leoben)25/09/2018, 11:05Coke, the main fuel of the blast furnace (BF) process, undergoes significant structural changes both in the macro- and microstructural level during its descend through the BF. To investigate some of these properties of coke, samples have been taken by drilling through one of the tuyeres on an actual BF. The aggregate mass has been processed to separate the coke pieces from it. These samples...Go to contribution page
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Mr Nagashima Yoshihiro (Mitsubishi Chemical Corporation)25/09/2018, 11:25Development of coke production technology which can maintain high coke strength with use of certain amount of low rank coal is needed. Accordingly, it is important to investigate influence of coke pore structure on coke strength and dominant factors of coke strength. Anraku et al. established a Stress simulation method by using three-dimension images of coke which were taken by X-ray CT. In...Go to contribution page
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Dr Weidong Tang (Northeastern University)25/09/2018, 11:25The influence of ordinary magnetite ratios on Hongge high-chromium vanadium-titanium magnetite (HCVTM) sinters was researched through sintering pot tests. The researches including yield, sintering ratio, tumbler index (TI), productivity, solid fuel consumption, reduction degradation index (RDI) and reduction index (RI) were tested and calculated. The addition of ordinary magnetite ore is an...Go to contribution page
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Mr Ahmadreza Amini (Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University, Japan)25/09/2018, 11:25Recently, reduction of CO2 emission and also energy conservation in ironmaking process are serious concerns which persuaded the researchers to look for a cleaner and a more efficient method for iron production. Microwave heating has been considered as a new heating method for iron ore reduction which could decrease the required carbonaceous materials for iron production. However, it...Go to contribution page
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Rudolf Hebel (Paul Wurth Deutschland GmbH)25/09/2018, 11:25Significant Blast Furnace (BF) hearth lining life extension is the target of the improved BF-hearth lining observation management; provided by Paul Wurth, Germany, (PWDE). The hearth lining main property modifications occur noteless during the running BF-life campaign and influenced the real hearth lining wear profile. No classical hearth lining temperature and heat flux observation...Go to contribution page
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Apsara Jayasekara (University of Wollongong)25/09/2018, 11:45Coke is a key reagent in the iron blast furnace process. To enhance its performance in the blast furnace a better understanding of the kinetics of coke reactions in the blast furnace is necessary. Using a synthetic coke (coke analogue) the gasification rate in CO2 of a coke containing calcia and calcium aluminates (CA6, CA, C3A) was studied. The coke analogue is a laboratory...Go to contribution page
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75. APPLIED FUNDAMENTAL RESEARCH OF FERRO-COKE PRODUCTION BY THE STAMPED CHARGING COKEMAKING PROCESSProf. Xuegong BI (State Key Laboratory for Refractory Materials and Metallurgy, Wuhan University of Science and Technology)25/09/2018, 11:45Ferro-coke is a highly reactive coke and considered a promising advanced burden material for blast furnace ironmaking due to a potential of decreasing RAR and CO2 emission. The essential reason is it reacts with CO2 in BF gases at lower temperatures, which is resulted in by the catalytic effect of metallic iron, and leads to a lower temperature of the thermal reserve zone. However, since iron...Go to contribution page
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Dr Afshin Sadri (Hatch Global Director of Non-Destructive Testing (NDT) Group)25/09/2018, 11:45The parameter that has the largest impact on the campaign life of a blast furnace is the health of the hearth refractory lining. When this lining is severely deteriorated, the furnace must be shut down for either a repair or a reline. This means that it is crucial to continuously monitor the health of the hearth refractory lining. However, this has proven to be difficult in the past due to the...Go to contribution page
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Prof. Maurício Bagatini (Federal University of Minas Gerais)25/09/2018, 11:45Iron and steelmaking industry is in demand to utilize ultra-fine iron ores due to changes in its availability and quality worldwide. Sintering plants are adapting to introduce higher ultra-fines percentage on their mixtures, raising concerns over the cold agglomeration step, critical to maintaining process stability and performance. Sintering bed permeability, granules mechanical properties...Go to contribution page
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Prof. Tianjun Yang (University of Science and Technology Beijing)25/09/2018, 13:30During last few years, iron production in China was kept at about 700 million tons annually, which was totally produced from BF process. At same time, a lot of mini BFs have been eliminated, and many big BFs have been built up and put into operation. There are 23 BFs with inner volume equal or over 4000m3. Both sinter machines and pellet facilities have been enlarged and upgraded...Go to contribution page
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Prof. Jose Adilson Castro (Federal Fluminense University)25/09/2018, 13:50The self-reducing phenomena has been explored with the aim of improving the reducing velocity of agglomerates during hot metal production. The inner phenomena taking place in the agglomerates, however, are still controversial and further studies are demanded. In this paper we proposed a detailed mechanism taking place within the agglomerates during the solid-gas self-reducing step. In order to...Go to contribution page
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Prof. Tom Honeyands (CIMR, Chemical Engineering, University of Newcastle, Australia)25/09/2018, 14:30Size segregation of the iron ore granules packed on a sinter strand has a significant influence on both airflow rate and temperature distribution through the bed. Therefore, it is a key factor that governs the efficiency of mass and heat transfer down the sinter bed. For a defined sinter feed and granule size distribution, it is possible to increase the size segregation through optimising the...Go to contribution page
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Ms Lauren North (Centre for Ironmaking Materials Research, The University of Newcastle, Australia)25/09/2018, 14:30Despite the extensive research in the prediction of coke properties from the parent coals, at present, no single model exists to adequately predict coke quality from all coal basins. Whilst heavily used as a feature in early coke quality prediction models, the binding behaviour of the maceral components, termed fusibility, has had limited success in being implemented into a global prediction...Go to contribution page
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Mrs BEATRIZ FAUSTA GANDRA (USIMINAS)25/09/2018, 14:30In 2008, after the Blast Furnace#1 shut down, was identified an abnormal phenomenon in its hearth which required great team effort for proper recovery of the refractory and resumption of operation. At the time, it was aimed to extend the campaign in five years. In this paper, it is described the general aspects of the equipment, the situation in his hearth, actions taken and the current...Go to contribution page
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Mr Anand Kumar AGRAWAL (PaulWurth)25/09/2018, 14:30The iron and steel industry is a source of industrial CO2 emissions. The BF-BOF route of iron and steel making is considered as the most successful and economic route, hence widely employed for the iron and steel production. To comply with the targets set by the latest “conference of the parties” (COP) for climate change significant additional effort is required to achieve the target CO2...Go to contribution page
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Dr Jia-Shyan Shiau (China Steel Corporation)25/09/2018, 14:50In operational practice of the iron ore sintering machine, the increasing air leakage ratio will cause the higher electricity consumption of the suction fan, the higher solid fuel rate, the lower sinter productivity, and the worse sinter quality. In general, more than 50% of the leakage occurs at the pallets themselves and the interfaces between the pallets and the wind boxes. Basically, the...Go to contribution page
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Dr Mikko Helle (Åbo Akademi University)25/09/2018, 14:50A well operating hearth is a prerequisite for stable and effective blast furnace operation. On-line estimation of the liquid levels in the blast furnace hearth provides an effective means to prevent disturbances and to improve tap management. A mathematical model of the iron and slag levels in the hearth has been developed. The model is based on mass balances using information about the in-...Go to contribution page
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Prof. Jing LI (University of Science&Technology Liaoning)25/09/2018, 14:50Evaluation of coking coal properties in coking Industry depends on several independent indicators tested in different test conditions for a long time, for example, Gieseler fluidity, Arnu-Audibert's dilatometer, plastometer indice, Roga index, and volatile content. On the other hand, evaluation of coke thermal properties depends on Coke Reactive Index (CRI) and Coke Strength after Reaction...Go to contribution page
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Mr Chengfeng Sun (Chongqing University)25/09/2018, 14:50Thick bed technique has been widely used in the sintering plants , because it can save fuel consumption and achieve significant economic benefits. However, when the sintering bed height further increases, the cross-section shape would vary with respect to the nclination angle, and directly affect heat transfer inside sintering bed afterwards. After a two-dimensions(2D) mathematical model is...Go to contribution page
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Mr Ujjal Ghosh (Tata Steel)25/09/2018, 15:10Tuyere is the equipment which is supposed to sustain one of the most adverse conditions inside the Blast Furnace. Reliability of Tuyere is very important for trouble free safe operation of Blast furnace. Failure of tuyere increases cost of operation in terms of increased fuel rate and production loss as well as create hazard for the process and human. In front of the tuyere almost 2200 – 2300...Go to contribution page
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Mr Tobin Harvey (The University of Newcastle Australia)25/09/2018, 15:10Typically a large proportion of the ferrous burden charged to the ironmaking blast furnace is iron ore sinter. The quality of iron ore sinter has a strong influence on the productivity and fuel efficiency of the furnace, therefore high quality sinter is desirable. Individual pieces of sinter product from industrial sinter strands and sinter pot test are variable in composition and structure....Go to contribution page
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Mr Anrin Bhattacharyya (Montanuniversitaet Leoben)25/09/2018, 15:10Furnace coke was experimental heated between 850°C and 1100°C by varying the gas composition and the alkali content of the raw coke. Raman spectroscopy (Iterative Fitting of Raman Spectra) evaluates the microstructural change of coke during the experiments. The obtained results indicate a significant microstructural variation within a bulk sample. This variation controls significantly the coke...Go to contribution page
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Prof. Chuan Wang (Swerea MEFOS)25/09/2018, 15:10Within the integrated steel plant, the blast furnace BF is the most energy intensive process with significant amount of CO2 emission. Switching of fossil fuels to biomass offers an alternative for the natural resources reservation and climate change mitigation. In recent years, lots of efforts have been putting on developing biomass for BF’s utilization, especially in regions with abundant...Go to contribution page
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Prof. Yoshiaki Kashiwaya (Kyoto University, Department of Energy Science and Technology)25/09/2018, 15:30A CaO-Fe2O3 system is a fundamental binary system for the iron ore sintering process. Although the basic reactions have been investigated since the 1960s, melting and solidification caused by the combustion of coke results in an unstable state owing to extreme temperature variations. In this study, using a hot thermocouple method, samples of 10% CaO-90%Fe2O3 and 20%CaO-80%Fe2O3 were melted on...Go to contribution page
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Mr Ian Cameron (Hatch Ltd.), Dr Mitren Sukhram (Hatch Ltd.)25/09/2018, 15:30Hot blast superheating using a hot mixer equipped with plasma torches promises to reduce the blast furnace coke consumption and carbon footprint while increasing blast furnace productivity. Countermeasures to keep the hot blast refractory below its service temperature limit were developed using computational fluid dynamic (CFD) modeling and evaluated at the pilot plant scale. The operation...Go to contribution page
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Mr Ka Wing Ng (Natural Resources Canada)25/09/2018, 15:30Substitution of pulverized coal injection by solid biocarbon fuel has the potential to achieve substantial reduction in GHG emissions from blast furnace ironmaking. A techno-economic model was developed to evaluate the value-in-use of solid biocarbon to facilitate the selection of solid biocarbon for replacement of pulverized coal injection. The value-in-use of solid biocarbon is strongly...Go to contribution page
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Mr Norimasa Ikeda (JFE Steel Corporation)25/09/2018, 15:30JFE Fukuyama No.5 D battery, since this battery started up, we struggle to control the temperatures of center flues and they fall to a low level. We estimated that the amount of air flow in center flues is less than gas flow because of the oven structure. Then, we entertained the way to increase air flow and invented the way we insert air with C ports which are used in only C gas inflammation....Go to contribution page
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Mr Kohei Okada (Graduate School of Environmental Studies, Tohoku University, Sendai, Japan)25/09/2018, 16:15Improvement of sinter reducibility is necessary for high production rate of blast furnace, involving reduction of the slag component in the sinter. Replacement of peridotite (MgO-SiO2) for dolomite (CaMg(CO3)2) is a potent option as dolomite does not contain SiO2. However, dolomite is hard to assimilate and deteriorates sinter strength. In this study, assimilation behavior of dolomite has...Go to contribution page
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Mr Birendra Prasad (DALMIA OCL)25/09/2018, 16:15Silica Bricks are made from Quartzite which mostly contents quartz phase. During making, the quartz is converted into phases like Tridymite and Cristobalite along with some amorphous phases. This polymorphic transformation in Silica brick is governed by the impurities present in parent quartzite and also with the addition of mineralizers. However in this process very little amount (<1%) of...Go to contribution page
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Mr Kazumoto Kakiuchi (Nippon Steel & Sumitomo Metal Corporation)25/09/2018, 16:15In COURSE50 STEP2, integrated verification tests of the mitigation of CO2 emissions and CO2 separation from blast furnaces are being conducted using a newly built 12m3 experimental blast furnace and a 30-t-CO2/day chemical absorption process evaluation plant simultaneously. The experimental blast furnace was constructed in Kimitsu Works and the construction was completed in September 2015. ...Go to contribution page
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Johanna Alatalo (LKAB - Research & Development)25/09/2018, 16:15Since LKAB decided to invest in a pilot scale blast furnace in 1996, the equipment has over the years produced a significant amount of data and results for improvement of products and processes within ironmaking. The experimental blast furnace has played a vital role in many research projects, producing important results which simplify the decisions whether to move into larger scale or...Go to contribution page
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Mr Shigeaki Tonomura (Nippon Steel & Sumitomo Metal Corporation)25/09/2018, 16:35Japanese steelmakers have executed “development of technologies for environmentally harmonized steelmaking process, ‘CO2 ultimate reduction in steelmaking process by innovative technology for Cool Earth 50’ (COURSE50)” since FY 2008. This is a national project commissioned by the New Energy and Industrial Technology Development Organization (NEDO). The target of COURSE50 is the mitigation...Go to contribution page
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Prof. Johannes Schenk (Montanuniversität Leoben), Dr Runsheng Xu (Wuhan University of Science and Technology), Prof. Wei Wang (Wuhan uiversity of Science and Technology)25/09/2018, 16:35Highly-reactive coke can improve the reaction efficiency of blast furnace, as well as decrease the reduction agent ratio and CO2 emission. Ferro-coke, which is obtained by combining coal with iron ore during coking, has been studied as a novel highly-reactive coke. In this study, effect of three iron ore types (limonite, hematite and oolitic hematite) on the gas generation, volume behavior,...Go to contribution page
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Dr Daisuke Maruoka (Graduate School of Environmental Studies, Tohoku University)25/09/2018, 16:35Silico-Ferrite of Calcium and Aluminum (multi-component CF) is one of main minerals in iron ore sinter. Multi-component CF is classified by columnar structure (SFCA) and acicular structure (SFCA-1), which have different crystal structures . It is considered that SFCA-1 has higher reducibility than SFCA, however, the results reported by previous studies have been included factors of adjacent...Go to contribution page
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Mr Mingrui Yang (Chongqing Universituy)25/09/2018, 16:35The wetting behavior of calcium ferrite (CF) slag on TiO2 substrate at 1523K was investigated using an improved sessile drop method. The initial apparent contact angle was 30°-50°, and the final apparent contact angle was less than 20°. The CF-TiO2 system is reactive wetting system, and the wetting process was divided into four stages. Stage I: physical spreading; stage II: reaction at the...Go to contribution page
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Mr YANKUI LI (Peking University Pioneer Technology Co.,Ltd.)25/09/2018, 16:55The iron & steel-work off-gases e.g. blast furnace gas(BFG), basic oxygen furnace gas(BOFG) and coke oven gas(COG) are generally used for heat or power generation, but the efficiency of gases utilization is low. A total solution using PU-1 molecuar sieve and vacuum pressure swing adsorption(VPSA) process, gains the carbon monoxide(CO) gas economically which purity can be more than 99%vol., let...Go to contribution page
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Mr Daisuke Igawa (JFE Steel Corporation)25/09/2018, 16:55Reasonable selection of coal brands and blending them for preparing raw material of coke are important to achieve the effective utilization of caking coal and enhancement of coke strength. Coal compatibility, namely “blending effect” has long been an unresolved problem. The effect is deviation between actual strength of coke made from coal blend and estimated strength which is calculated by...Go to contribution page
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Mr Yuman CHE (Ansteel Group)25/09/2018, 16:55Abstract: The paper presents a brief introduction about the significant work conducted with a scale of physical bell-less burden model for falling curves and burden distribution at any given chute angles. An incidence formula between flow control gate (FCG) and burden flow was established by the actual measurement of charging. The measurement of falling curves using laser trajectory probe at...Go to contribution page
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Mr Weili zhang (University of Science and Technology Beijing)25/09/2018, 16:55Flow and Occurrence of Magnesium in Sintered Products were studied by XRF and SEM-EDS. The results of this research are as follows. The figure shows magnesium content of sintered products in the following decreasing order: blast furnace return fine, sinter return fines, finished ore. Moreover, magnesium content in the 0.5mm-3.15mm size of blast furnace return fine is especially high. Magnesium...Go to contribution page
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Dr Reiko Murao (Nippon Steel & Sumitomo Metal Corporation)25/09/2018, 17:15It is important to understand solid–liquid equilibrium of Al2O3-CaO-Fe2O3-SiO2 system to understand the sintering reaction, although the sintering reaction is a non-equilibrium and inhomogeneous. Phase equilibrium calculation of this system has some problems, such as thermodynamic models for some silico-ferrite of aluminum and calcium...Go to contribution page
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Mr Hirokazu Yokoyama (Nippon Steel & Sumitomo Metal corporation)25/09/2018, 17:15In COURSE50 STEP2, integrated verification tests of the reduction of CO2 emissions and CO2 separation from the blast furnace are being conducted, using a newly build 12 m3 experimental blast furnace and a 30-t-CO2/day chemical absorption process evaluation plant simultaneously. Tests have been carried out with the experimental blast furnace to establish a reaction-controlling technology to...Go to contribution page
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Dr Maarten Geerdes (Geerdes Advies)25/09/2018, 17:15The present study was undertaken to find out whether or not there is an optimum distribution for nut coke and metallurgical coke over the ferrous layer and coke layer respectively. To this end a model for degradation of coke in the blast furnace was developed. It was verified with data from tuyere raking experiments. The tuyere raking result can be estimated based on degradation as a...Go to contribution page
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Dr David Jenkins (University of Newcastle)26/09/2018, 08:00The conversion of coal into coke is a complex process, involving interrelated phenomena occurring simultaneously. These include heat transfer, gas evolution, softening and resolidification, evaporation and condensation, bubble growth and coalescence, gas transport, shrinkage and fissuring. Moreover, a key aspect of coke quality is its (cold and hot) strength as well as its reactivity. ...Go to contribution page
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Dr Sang-Ho Yi (POSCO)26/09/2018, 08:20FINEX® is an alternative iron making process to the blast furnace (BF) route and it is based on the direct use of iron ore fines and non-coking coal, which gives operational flexibility, cost competitiveness and environmental benefits compared to the conventional BF route. Continuous improvements are carried out to increase the process efficiency, including the latest developments of the...Go to contribution page
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Mr Dongyoon Park (POSCO)26/09/2018, 09:00The FINEX® process has been developed since 1992, starting from lab scale tests to constructing a pilot, a demo and two industrial plants consecutively in Pohang Works, South Korea. It has been 11 years since the first 1.5 MTPA commercial plant, #2 FINEX, began operating. The cumulative production of #2 FINEX achieved 14 million tons of hot metal and the availability in 2017 hit the record...Go to contribution page
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Dieter Bettinger (Primetals Technologies Austria GmbH)26/09/2018, 09:00The steps from data to information to knowledge and finally standardized operation for the blast furnace are put into the overall picture of digitalization in the ironmaking area. By introduction of expert systems individual judgement of process conditions and required actions receive support by rule based decision systems with an incorporated, standardized operation strategy that has been...Go to contribution page
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231. ESTABLISHEMENT OF NEW SINTERING REGIME FOR HIGH ALUMINA IRON ORE FINES AT TATA STEEL JAMSHEDPURMr Arunkumar CHELLADURAI (Tata Steel Ltd., Jamshedpur), Mr SRINIVASA REDDY ASADI (Tata Steel Ltd., Jamshedpur)26/09/2018, 09:00Pellets were introduced into the Blast furnaces at Tata Steel Jamshedpur post the commissioning of pellet plant in the year 2012. The new burden mix (sinter, ore and pellet) offered an opportunity to produce sinter using a new flux regime which permitted flexibility in ore mix and resulted in change of sinter properties. A strategic decision was taken to produce pellets at acidic/minimum flux...Go to contribution page
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Prof. Zhengkai Gao (University of Science & Technology Beijing)26/09/2018, 09:00Abstract: After the 5800m3 blast furnace was put into operation in 2009, The Thermal Camerastarted observing the burden surface and gasflow conditionsin the furnace. BFThermal Camerawithhigh resolution chip was upgraded in 2017. Much clear image of the burden surface and gasflow conditions were obtained.Operators can understand very wellthe situation inside the vessel all the time....Go to contribution page
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Prof. Sung-Mo Jung (Pohang University of Science and Technology)26/09/2018, 09:20In two stage-smelting reduction process, it is desirable to decrease the reduction degree of iron ore in a pre-reducing unit by reducing its temperature to avoid any troubles due to stickiness of high reduced iron ore. However, less pre-reduced iron ore can induce direct reduction in a melter-gasifier, which can increase the consumption of coal. In this case, the portion of direct reduction...Go to contribution page
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Mr Takahide Higuchi (JFE Steel Corporation)26/09/2018, 09:20The qualities of iron ores have been deteriorating, which has influenced sinter quality and productivity adversely. In the sintering process, iron ore fines, fluxes such as limestone and coke breeze, are granulated, then charged and fired in a sinter machine. Sinter quality and productivity are strongly affected by the formation of initial sinter melt, assimilation and penetration into nucleus...Go to contribution page
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Dr Maarten Geerdes (Geerdes Advies)26/09/2018, 09:20The present paper describes how the ferrous burden melts in a blast furnace and what consequences it has for blast furnace operation. For high PCI and high productivity operations, gas flow to and hence heat transfer from bosh gas to the solid/cohesive state of the ferrous burden is the rate limiting step in processing the ferrous burden, since the heat requirement of the direct reduction...Go to contribution page
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Prof. Nikolai Spirin (Ural Federal University)26/09/2018, 09:20Changes in heat transfer regularities of blast furnace process in course of this process refinement are considered and evaluated. It is shown that stable and profitable operation of modern intensive blast furnace process with variety of raw materials, combined blast etc. could be achieved only preserving two distinct zones of high intensive heat transfer. Any changes in melting process do not...Go to contribution page
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Dr Jianbo Huang (Central Research Institute, China BaoWU Iron & Steel Group)26/09/2018, 09:40A multi-coupled three-dimensional transient model is proposed for simulation of blast-furnace (BF) iron-making processes. The model couples the whole thermo-fluid flow regions in the BF internal, including shaft, belly, hearth and raceway. Furthermore, the internal fluid flow, heat/mass transfer process is coupled with the heat transfer taking place in the outside refractory walls enclosing...Go to contribution page
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Mr Koki Terui (JFE Steel)26/09/2018, 09:40To achieve stable operation of coke mixed charging, it is essential to control coke segregation behavior in mixed layer. In this study, the effect of charging conditions and burden particle diameter of mixed coke ratio at blast furnace top were analyzed by numerical model based on discrete element method. Parameters necessary for calculation were optimized by experiment and calculation. Then,...Go to contribution page
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Dr Heng Zhou (University of Science and Technology Beijing)26/09/2018, 09:40Direct reduction degree in COREX affects the reducing gas component and effective heat utilization rate. The present work systematically studies the influence of direct reduction degree on these characteristics in COREX through a static model. The model is developed based on mass and heat balances, which can calculate the consumption of iron ores, coal, fluxes, the volume and composition of...Go to contribution page
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Mr Roland Mežibrický (Technical university of Košice)26/09/2018, 09:40In recent years, substituting a part of coke breeze with a biomass fuel in the sintering of iron ores has became an attractive research topic, which should help with the minimization of CO2 released from fossil fuels as well as searching for an alternative for coke in ironmaking. Besides the common process analyses, characterization of sinter properties through the mineralogical composition...Go to contribution page
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Mr Wanren Xu (Baosteel Group Corporation,China)26/09/2018, 10:00In order to simulate synchronous distribution of coal (coke) and DRI (ore) in the Melter Gasifier of COREX-3000, with down moving of perimeter zone of char bed, we have studied by laboratory experiment effect of charging pattern and kind of material on the stock pile shape, distribution of ore/coal ratio, distribution of porosity and particle size segregation on radius direction. The...Go to contribution page
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Dr Miyuki Hayashi (Tokyo Institute of Technology)26/09/2018, 10:00The increment in the impurities of iron ore such as Al2O3 lowers the reducibility of iron ore sinter and increases the gas permeability resistance in a blast furnace. In order to overcome the problems, MgO is often added into sinter by blending dolomite and/or serpentine as a constituent of raw materials of sinters. The role of MgO in sinter at the lower part of a blast furnace depends on the...Go to contribution page
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Dr Yakov Gordon (Technical Director, Hatch)26/09/2018, 10:00The influence of the melting intensity, which is defined and estimated as a specific blast-furnace productivity, on the stability of blast furnace operation and conditions of indirect reduction of wustite is evaluated and studied. It is shown that at elevated melting intensity -specific productivity the incremental change in the melting intensity leads to a more modest variation in the...Go to contribution page
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Gilles Kaas (Paulwurth)26/09/2018, 10:00In sinter plants, at the end of the sintering process the product is subjected to high performance screens of 20 mm, 10 mm and 5 mm respectively. This allows part of the middle size fraction to be utilized as a hearth layer in sinter strands. Normally, the screened product is then remixed to be sent to the blast furnace plant, where it is charged into the furnace. In contrast, if the screened...Go to contribution page
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Prof. Ko-ichiro Ohno (Kyushu University)26/09/2018, 10:50Low carbon operation of blast furnace is important technology for mitigation of CO2 emission from ironmaking process. This operation means decreasing of coke rate in raw material charging amount into blast furnace. This situation makes severe condition of gas permeability in especially cohesive zone of blast furnace. Therefore, cohesive zone formation behavior should be correctly understood....Go to contribution page
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Mr Yasuhide Yamaguchi (Nippon Steel & Sumitomo Metal Corporation)26/09/2018, 10:50In order to decrease Reducing Agent Rate (RAR) and CO2 emission of blast furnaces, it is important to decrease slag volume. In NSSMC, more than 70% of blast furnace burden is sinter ore, so slag volume control is very important. However slag contents of sinter feeds are increasing because of resource deterioration. Therefore, using high amount of iron ore concentrate, which has relatively...Go to contribution page
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Prof. Fengman Shen (School of Metallurgy, Northeastern University,Shenyang, Liaoning 110004 China)26/09/2018, 10:50**Abstract:** The content of Al2O3 in iron ore is of negative effects on sintering process, metallurgical properties of sinter and smelting of BF, which has a serious influence on the quality of molten iron. So it is very important to study the activity of Al2O3 in metallurgical slag to grasp and control the influence of content of Al2O3 on the quality of molten iron. In this paper, several...Go to contribution page
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Mr Masab Naseri Seftejani (Fogh. Lic)26/09/2018, 10:50Hydrogen plasma smelting reduction (HPSR) is now an established alternative to be conside-red for upgrading existing ironmaking process and reducing the emission of greenhouse gases. HPSR offers thermodynamics and kinetics advantages over conventional carbo-thermic re-duction of iron ores. This process provides improved reducing conditions by the application of hydrogen in the plasma state and...Go to contribution page
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Mrs Amanda Gullberg (Swerea MEFOS AB)26/09/2018, 11:10In the blast furnace (BF) process, the presence of alkalis (Na, K) is known to have negative influences on the process due to the catalytic effect on coke gasification, destruction of carbon structure by intercalation of alkali, scaffold formation and refractory attack. Alkalis are introduced with the raw materials and due to alkali circulation; alkalis are picked-up on the way to the higher...Go to contribution page
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Dr TAICHI MURAKAMI (Tohoku University)26/09/2018, 11:10For decreasing CO2 emission from iron making process, increasing hydrogen concentration in blast furnace is suitable method. However, the property of iron ore agglomerate such as reducibility should be optimized because hydrogen reduction is endothermic reaction and temperature distribution in BF drastically changes by increasing hydrogen concentration. In this study, the effect of hydrogen...Go to contribution page
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Mr Gabriel Steindorf (Department of Ferrous Metallurgy, RWTH Aachen University)26/09/2018, 11:10The iron ore sintering process is essentially influenced by the permeability of the sinter bed. Higher amounts of ultra-fine iron ores lead to a weak granulation behaviour, which causes lower voidage in the sinter bed and therefore a decreasing bed permeability. Due to this, the application of ores with a size lower than 0.2 mm is limited. In this investigation the amount of ultra-fine ores...Go to contribution page
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Prof. Kejiang Li (University of Science and Technology Beijing)26/09/2018, 11:10The only HIsmelt process in the world was moved from Kwinana, Australia to Shandong, China in 2013 and all the related copyright has also been transferred from Rio Tinto to a Chinese company in 2017. The Shandong HIsmelt plant was put into operation in June, 2016 and it has achieved 70-day continuous operation with the highest daily production being 1876 t/d. This is the first time to achieve...Go to contribution page
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Mr Gi Ho La (Department of MSE, Yonsei Univ., Seoul Korea)26/09/2018, 11:30Limonitic laterite is an iron ore consisting of a mixture of hydrated iron oxide-hydroxides in varying composition. The generic formula of limonitic laterite is expressed as (Fe, Ni, Mg)O∙(OH)∙H2O. It is possible to obtain high quality ferronickel and iron oxide, which can be used as a blast furnace charge, through selective reduction of Ni using reduction potential difference between Fe and...Go to contribution page
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Dr Liming Lu (CSIRO)26/09/2018, 11:30With the rapid change in iron ore supplies and composition, steel mills now have to adjust the composition of the ore mixture to the sinter plant more frequently than ever before. Hence, different scales of test methods have been developed to help sinter plants evaluate new ore types and ore blends in order to optimise their ore mixtures and reduce raw material costs. However, iron ore...Go to contribution page
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Mr Gang Li (Chongqing University)26/09/2018, 11:30In the current work, the reduction route of CaO·Fe2O3 (CF) was investigated and the comparison of CF and Fe2O3 (H) on their reduction kinetics was made. Non-isothermal reduction experiments of powdery CF and H heating up to 1123K with a rate of 10K·min−1 in a continuous stream of 30% CO and 70% N2 were conducted through thermo-gravimetric analysis. It found that the reduction processes of CF...Go to contribution page
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Dr Zhiyuan Chen (TU Delft)26/09/2018, 11:30HIsarna is an emerging and promising alternative ironmaking process. Smelting cyclone is used to melt and pre-reduce fine and un-agglomerated iron ore particles in HIsarna reactor. Fine ore and flux are injected in the smelting cyclone together with oxygen. The injected ore is intensely mixed with rising hot reducing gases, undergoes partial reduction and melting. The melt hits the...Go to contribution page
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Mr chunlong wang (Capital Engineering ＆Research Incorporation Limited)26/09/2018, 11:50Hearth and high heat load region are key factors affecting the campaign life of blast furnace, mainly for the erosion of carbon bricks lined on furnace bottom and hearth and damaged of cooling equipment of high heat load region. In this paper, the long life of high heat load region was studied. And the new furnace longevity technology in the area was developed, which was combined cooling...Go to contribution page
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Mr Acharyulu AVB (DGM (Process Optimization))26/09/2018, 11:50Acute crisis of water in the region compelled the usage of recycled water with high conductivity that helped in increasing granulation. However, usage of recycled water beyond 50% has resulted in undesired accretion in the Mixing and Nodulizing Drum. Magnetized water reduced contact angle and improved the granulation of green mix. The effect of magnetization of water was studied by varying...Go to contribution page
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Prof. Baojun Zhao (The University of Queensland)26/09/2018, 11:50High temperature experiments have been undertaken using equilibration, quenching and EPMA technique to characterise the phase equilibria of high Ti-containing slag systems. The experimental results have been presented in the form of pseudo-binary sections to show the effects of CaO, TiO2 and oxygen partial pressure on liquidus temperatures. The primary phases observed in the composition...Go to contribution page
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Dr James Small (Tata Steel, IJmuiden, Netherlands)26/09/2018, 11:50Advanced Softening and Melting (ASAM) experiments were performed with mixed sinter-pellet burdens of contrasting compositions, showing large differences in vertical contraction and pressure-drop curves (vs T, time). To understand the mechanisms behind these differences, experiments were interrupted at key stages of the simulated BF trajectory for detailed petrological investigation. Combining...Go to contribution page
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Prof. Guojun Ma (Wuhan University of Science and Technology)26/09/2018, 13:30Abstract: According to the coexistence theory of slag structure, a calculation model of concentration of SiO2-CaO-Al2O3-FeO of depleted copper slag was established. The model was used to calculate and analyze the effects of slag composition, temperature (T) and basicity (B) on the activity of FeO (NFeO). The results show that NFeO tends to increase and then decrease with the increase of...Go to contribution page
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Dr Saeed Ghali (Central Metallurgical Research & Development Institute (CMRDI))26/09/2018, 13:30In Egypt, the crude steel production has increased significantly with higher growth rate in the past years of the 21th century. Furthermore, many mill steel companies have been established for steel processing. With the increase in steel production and steel processing, a large amount of waste materials (slag, dust and mill scale) are produced. Mall scale is one of these waste materials...Go to contribution page
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Dr Mingyin Kou (University of Science and Technology Beijing)26/09/2018, 13:30The chute shape determines the particle trajectory on and leaving the chute, and further affects the burden distribution in blast furnace. Therefore, a three dimensional model of the upper part of serial type bell-less top blast furnace is established based on discrete element method. The effects of chute shape and chute angle on the burden distribution on the chute and at the throat of blast...Go to contribution page
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Mr Mingshun ZHOU (Ansteel Group)26/09/2018, 13:30For raising sinter productivity and quality while reducing energy consumption and raw material cost, a new blending method has been created in Ansteel to optimise sintering blends. Traditionally the granulation of sintering blends in Ansteel has been adopted in disc pelletisers, which was recently found to be one of the causes to unstable blast furnace operation due to their low mixing...Go to contribution page
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Prof. Brian Monaghan (School of Mechanical, Materials, Mechatronic and Biomedical Engineering and ARC Research Hub for Australian Steel Manufacturing, University of Wollongong)26/09/2018, 13:50The recycling of steel plant by-products is a key issue for all steelmakers. For these materials to be fully utilised without incurring environmental and economical penalties they need to be better understood with respect to their composition (morphology, phases and phase distribution). Research is being undertaken that aims to realise the value of steel plant by-products to the Australian...Go to contribution page
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Mr Debanik Mitra (Tata Steel)26/09/2018, 13:50Tata Steel is the pioneer in steel industry of India. Production started way back in 1911. However, the first sinter plant (known as SP1) was commissioned in 1958. It was a modest beginning at first, with production of acid sinter. Tata Steel has been sintering captive iron ore fines having high alumina (above 4%) and silica (about 1%). This typically represents the Indian situation where most...Go to contribution page
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Dr Liming Lu (CSIRO)26/09/2018, 13:50Blast furnace cohesive zone has a profound impact on the hot metal productivity and quality, fuel consumption, operation stability and lining life of the blast furnace. The high temperature properties of ferrous burden materials determine the configuration and location of the cohesive zone, and have therefore attracted increased attention. While numerous standard testing methods are in use...Go to contribution page
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Mr Oscar Bjareborn (Victoria University of Wellington, New Zealand)26/09/2018, 13:50New Zealand ironsand is an unconventional titaniferous ore (typically ~8% TiO2 by mass) which is commercially utilised to produce DRI, and as a blending component within BF sinters. Oxidative sintering of this titanomagnetite sand enables high-strength porous pellets to be formed, and such pre-oxidation is known to significantly enhance the gas-solid reduction rate compared to unoxidised...Go to contribution page
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Dr Yakov Gordon (Technical Director, Hatch)26/09/2018, 14:10The straight grate and grate kiln indurating processes are the two proven and widely accepted iron ore pelletizing technologies. Hatch performed a technical and economic comparison between the two processes, emphasizing their specific advantages and applicability for selected regional conditions. The technology comparison is based on publicly available literature and our extensive database of...Go to contribution page
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Mr SEUNGYEON WON (Hyundai Steel Company)26/09/2018, 14:10Recently, steel industry confronts a high risk of deterioration of Iron ore property as well as mitigation of green-house gas and particulate in response to the environmental regulation. For particular, iron ore sintering in the integrated steelmaking process generates a high level of particulate due to use of fine ore. It is impossible to recover energy through by-product gas like BFG and COG...Go to contribution page
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Mr Anton Andersson (Luleå University of Technology)26/09/2018, 14:10Ore-based steelmaking generates a variety of residues including dusts, sludges, scales and slags. Recycling of these residues within the process or via other applications is essential for sustainable production from both environmental and economic aspects. In blast furnace (BF) ironmaking, the gas-cleaning equipment recovers the particles in the off-gas as BF dust and sludge. Traditionally,...Go to contribution page
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Prof. Zhengkai Gao (University of Science & Technology Beijing)26/09/2018, 14:10Abstract: No.8 blast furnace (3200m3) of HanSteel is equipped with an online laser detector of burden surface profile. During the furnace running, images of burden surfacecan be obtained with laser scanning.All data and curves of theburden profile are processed bycomputer to provide real-time BF information for operators. This system can be used to detect burden surface profile and...Go to contribution page
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Dr Yakov Gordon (Technical Director, Hatch)26/09/2018, 14:30Automation and digitalization in coke and ironmakingOral PresentationModern Iron & Steel Works as a rule are equipped with powerful distributed control systems (DCS) and databases. Implementation of DSC system solves the problem of storage, control, protection, entry, editing and retrieving of information, as well as creation of the necessary reporting data. At the same time, Russian domestic and international experience shows that improvement in quality,...Go to contribution page
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Ms Katarina Lundkvist (Swerea MEFOS AB, Box 812, SE-97125 Luleå, Sweden)26/09/2018, 14:30At SSAB Europe’s integrated steel plant in Luleå, Sweden, much effort is directed towards maximising the recycling of in-plant residues. As the blast furnace (BF) operates with a 100 % pellet burden, the main part of all dusts and sludge are recycled via a BF cold bonded briquette and by the BF-injection of its flue dust. However, BF sludge is not presently recycled due to concerns regarding...Go to contribution page
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Prof. Jianliang Zhang (University of Science and Technology Beijing & the University of Queensland)26/09/2018, 14:30Basic characteristics of forsterite were systematically studied by chemical analysis, XRD, SEM-EDS. A series of experiments were performed to investigate the effect of forsterite fineness on pellets strength and porosity by changing pre-grinding time of olivine. It could be found that prolong the pre-treatment time of forsterite is beneficial to the promotion of pellets strength; there are two...Go to contribution page
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Thomas Bürgler (voestalpine Stahl GmbH)26/09/2018, 14:30Direct reduced iron (DRI) can be used after briquetting in form of HBI in the blast furnace to decrease the consumption of reducing agents as well as to increase the production of hot metal. voestalpine Stahl GmbH Linz uses HBI from its own plant in Corpus Christi (Texas) at the blast furnaces 5 and 6. In this article the influence of the usage of HBI in the blast furnaces on the consumption...Go to contribution page
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Prof. Wei Wang (Wuhan University of Science and Technology)26/09/2018, 14:50With the rapid development of iron and steel industry in China, the iron ore pellet as an essential raw material plays an important role in the blast furnace. Due to large-scale production of iron ore pellet, microscopic characterization is an important step in quality control. The structure and distribution of minerals in a pellet and the bonding types at point contacts between the grains...Go to contribution page
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Dr Zhengjian Liu (University of Science and Technology Beijing)26/09/2018, 14:50COREX shaft furnace dust contains large amounts of valuable elements, such as iron and carbon, and compared with blast furnace dust, it contains more metallic iron. Therefore, take appropriate process to recycle the COREX dust can further achieve efficient utilization of resources. The chemical composition, particle size distribution, microstructure and mineral composition of the dust were...Go to contribution page
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Mr Vladan Andrejic (HBIS GROUP Serbia Iron & Steel)26/09/2018, 14:50HBIS GROUP Serbia Iron & Steel is integral Steel plant owned by the HBIS Group that in its composition has 2 Blast furnaces and 3 lines for sinter production. Usual ore burden of the blast furnace is: 35%sinter+62%pellets+3%B-scrap. During January and February 2016, test periods were performed at the Blast Furnace 1, where the ratio of the sinter was gradually reduced to final excluding....Go to contribution page
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Mr Alexander Baryshnikov (LDS)26/09/2018, 14:50Automation and digitalization in coke and ironmakingOral PresentationDuring mining, beneficiation and processing stages in production it’s necessary to know chemistry of materials in real-time for optimal process control and improve final product quality. Using online information about chemistry it’s possible correct distribute iron ore and concentrate between stockpiles, optimal dosage fluxes and coke for stabilize sinter basicity before it is too late for a...Go to contribution page
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Mr Fan Zhou (Beijing Engineering Incorporation of Iron & Steel Technology, Beijing, China)26/09/2018, 15:10According to the comparative analysis of different blast furnace slag granulation methods and water-slag separation processes, we have combined the granulation tank, the innovative filtration process and the heat recovery together to ensure the slag granulation production reliable, energy-saving, environmental friendly, practical, economic and efficient. By the analysis of using grab crane to...Go to contribution page
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Kexin Jiao (University of Science and Technology Beijing)26/09/2018, 15:11In order to evaluate the performance of UCAR carbon brick in blast furnace, the production technology characteristics and the application of UCAR carbon brick in blast furnace were analyzed. Analytic hierarchy process was used to calculate the weight of the performance index for carbon brick, the erosion resistance of carbon brick in molten iron was considered as the key performance. The...Go to contribution page
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Mrs Rong li Sang (North China University of Science and Technology)26/09/2018, 15:12ZnO/activated semi-coke desulfurizer was synthesized using hydrothermal method. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N2 adsorption. The effects of the loading amounts of ZnO, reaction time and temperature on the performance of ZnO/activated semi-coke’s desulfurization capability were investigated in a...Go to contribution page
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Dr Mingyin Kou (University of Science and Technology Beijing), Mr Shun Yao (School of Metallurgical and Ecological Engineering, Beijing University of Science and Technology, Beijing 100083, China)26/09/2018, 15:13Blast furnace emission reduction optimization model is based on substance conservation and energy conservation of ironmaking process. The mathematical model is established using the multiple-objective optimization method with the cost and CO2 emission taken as objective functions. The optimization variables and constraints are determined by the characteristics of blast furnace ironmaking...Go to contribution page
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Jianliang Zhang (School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing)26/09/2018, 15:14In order to clarify the impact mechanism of CaO/SiO2 and MgO on the performance of Jiusteel blast furnace slag, based on the actual composition of Jiusteel blast furnace slag, the influences of CaO/SiO2 and MgO on viscosity and melting temperature of slags were investigated. Furthermore, the activity, liquidus temperature, liquid region and phase change of slag from 1600℃ to 1000℃ were...Go to contribution page
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Mr Sigit Prabowo (Robinson Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt 5046, New Zealand)26/09/2018, 15:15Substantial deposits of titanomagnetite ironsand are found throughout the west coast of the North Island of New Zealand (NZ). This titaniferous iron ore contains approximately 8% TiO2 equivalent, which prevents its use as a feedstock concentrate for conventional blast furnace (BF) processes. However, at present ~1.5 Mt pa is utilized in the rotary-kiln production of direct reduced iron (DRI),...Go to contribution page
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Dr Chao Liu (Northeastern University)26/09/2018, 15:16The flue gas circulation sintering process can not only realize the comprehensive utilization of resources, but also can realize clean production which by recycling sintering flue gas to conduct iron ore sintering and significantly reducing the flue gas processing in the terminal treatment. The flue gas directly recycling use in sinter production will affect the sinter properties, because the...Go to contribution page
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Prof. Xiangxin Xue (Northeastern University)26/09/2018, 15:17The effect of ordinary magnetite ratios on the basic characteristics of Hongge high-chromium vanadium-titanium mixed ores was investigated through micro-sinter methods. The researches including assimilation characteristic, crystal intensity characteristic, bonding strength characteristic and fluidity characteristic were studied. With increase of ordinary magnetite ratios in Hongge...Go to contribution page
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Dr Xuesong Zhang (ShouGang Group)26/09/2018, 15:18Laboratory test of removal of titanium from hot metalis developed in different remover, different proportion and different granularity.The suitable remover and parameters for industrial production test are found. At the same time the removable titanium removal device is designed and developed. Industrial test of removal of titanium from hot metalin blast furnace of Shou-gang stock company is...Go to contribution page
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Mr Bruno Flores (Federal University of Rio Grande do Sul - Brazil (UFRGS))26/09/2018, 15:19Brazil has a large coal reserve, which is mainly located in the Parana Basin, southern region of the country. Despite that, the steel sector, which is the largest coal consumer in Brazil, needs to import 100% of its demand. The coal from Barro Branco seam in Santa Catarina-Brazil is a potential raw material for coke production due to its well-known coking properties. Thus, the present study...Go to contribution page
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Prof. Eduardo Osório (UFRGS)26/09/2018, 15:21Metallurgical coke remains an irreplaceable material in the production of hot metal in blast furnaces, providing the heat and the reducible gases necessary for the process. Coke also play an important structural role in the blast furnace, providing a permeable bed for the passage of gases and liquids. Coke mechanical strength is a key factor for the performance of blast furnace and is...Go to contribution page
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Prof. Haibin zuo (University of Science and Technology Beijing)26/09/2018, 15:22Abstract: In order to effectively use of low rank coal and biomass, the co-liquefied product was extracted from two kinds of low-rank coals and biomass by N-2-methyl-2-purrolidinone(NMP) at high temperature and high pressure. The structures of the co-liquefied product and residues were characterized by element analysis, FT-IR spectra. The effects of temperatures, coal rank, solid-liquid ratio...Go to contribution page
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Dr Yue Kang (Northeastern University)26/09/2018, 15:23Blast furnace slag(BFS) is the most important by-product in iron and steel industry. Due to its high output and high slag temperature, the BFS is a very good heat source. Recovery of sensible heat from BFS is essential for saving energy, reducing emission and improving energy utilization efficiency in iron and steel industry. The process of bead-forming of BFS by gas quenching can effectively...Go to contribution page
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Prof. Jing LI (University of Science&Technology Liaoning)26/09/2018, 15:24The state of blast furnace (BF) campaign life and the erosion mechanism of BF hearth and bottom are summarized. According to the design and erosion conditions of hearth and bottom of a blast furnace with effective volume of 3200m3, a two-dimensional mathematical model was developed using the theory of heat transfer with ANSYS to monitor the erosion state of blast furnace’s hearth and bottom....Go to contribution page
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Prof. Shengli Wu (University of Science and Technology Beijing), Ms Yanan Lu (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing)26/09/2018, 15:25COREX process has obvious advantages in environment protection but still has some disadvantages, for example, the content of sulfur in hot metal is high and fluctuant severely. In the present work, the effects of the slag ratio, temperature of hot metal, binary basicity (R2) and the ratio of MgO/Al2O3 of the slag on the sulfur content in hot metal are investigated. Correlation analysis and...Go to contribution page
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Dr Runsheng Xu (Wuhan University of Science and Technology,China), Prof. Wei Wang (Wuhan University of Science and Technology,China), Mr Xu Wen (Shanghai University,China)26/09/2018, 15:26The blast furnace (BF) crucible breakout is not uncommon. More and more attentions have been paid on the penetration of molten iron and hearth lining erosion of BF. The iron skull, which is a layer of iron attached on the inner surface of the lining, provides a barrier between carbon brick and molten iron. Formation of a stable iron skull on the inner surface of the hearth lining could largely...Go to contribution page
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Dr Shungo Natsui (Hokkaido University)26/09/2018, 15:27A state-of-the-art numerical model was developed for analyzing packed bed structures containing non-spherical solids such as cokes and the high-temperature melt trickle flow characteristics of such beds. This enables the direct 3-dimensional analysis of packed beds that are difficult to visualize in experimental tests. The advanced discrete element method with 3D scanning technology is...Go to contribution page
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Mr HYUNGWOO KIM (POSCO)26/09/2018, 15:29Pohang No.3 BF has been repaired it from February 24th to June 6th for 102 days. POSCO intend to improve operation efficiency and save costs by enlarging inner volume from 4,350 to 5,600m3. The relining criterion are that remaining of hearth refractory, wear of body shell, needs for increasing production and so on. Recently, the most critical point among them is the remaining of hearth...Go to contribution page
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Dr Mingyin Kou (University of Science and Technology Beijing)26/09/2018, 15:31The liquid phase fluidity of iron ore is one of the vital index of sintering characteristic, as the suitable melt fluidity can get a stronger bonding strength of sintered body. In this paper, FactSage thermodynamic calculation software and visible micro-sintering test device were conducted to research liquid phase fluidity and the main influence factors of melt formation characteristics. The...Go to contribution page
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Dr juhua Zhang (Wuhan University of Science and Technology)26/09/2018, 15:32The converter vanadium slag is a byproduct of the iron making process when using the vanadium titanomagnetite as the iron raw material. A cleaner process including calcified roasting, dilute acid leaching, precipitation purification, vanadium precipitation with ammonium salt followed by pyrogenic decomposition was proposed to extract vanadium resource from this slag. And then vanadium...Go to contribution page
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Mr Li ZHU (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing), Dr Wenlong ZHAN (School of Materials and Metallurgy, University of Science and Technology Liaoning)26/09/2018, 15:33The blowpipe of blast furnace (BF) air supply apparatus is always the weakest link of the hot blast pipe system. The local air leak, high surface temperature and short service life of blowpipe were ubiquity in the air supply apparatus after being used for a period of time. The average service life of No.2 BF tuyere blowpipe with conventional liner in Shouqin Company was 250 days at the initial...Go to contribution page
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Dr jiliang zhou (ShouGang Group)26/09/2018, 15:34The process of spraying steam on surface of sintering bed was studied by using Fluent in this paper. The model was simplified into 2D and only front part of sinter machine was studied. As simulation results show that : (1) average temperature of sintering bed raised 20.3℃ and temperature of off-gas raised 35.42℃ after spraying steam; (2) the CO in off-gas became lower and CO2 in off-gas...Go to contribution page
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Dr Runsheng Xu (Wuhan University of Science and Technology), Prof. Wei Wang (Wuhan University of Science and Technology)26/09/2018, 15:35Under the pressures of the decreases of high quality iron ore, the iron and steel enterprises in China turn to use low-quality ores which contain elements such as much silicon, aluminum, et al, in sintering. In order to understand the metallogenic and reduction mechanism of the low-quality iron ore sinter, in situ test were used in this study. The sinter samples were analyzed by X-ray...Go to contribution page
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Dr Wei Zhang (Wuhan University of Science and Technology)26/09/2018, 15:36Flash ironmaking is a new smelting reduction process. The extent of molten iron carburization is close to saturation in the blast furnace process. However, the extent of carburization in a flash ironmaking process is unexpected because there is no compression of solid charge and no carburization reactions occurred between the deadman bottom and hot metal. To this end, iron powder reduced and...Go to contribution page
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Mr Dmitrii Tikhonov (DDG cooperation technologies)26/09/2018, 16:00Increase in blast furnace useful volume in course of reconstruction projects and increase in intensity of furnace operation is the major trends in hot metal production in Russian Federation. In majority of furnace enlargement projects the supporting structure, furnace foundation and part of the infrastructure remains the same, while furnace proper is completely replaced with installation of...Go to contribution page
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Mr Alexander Schlemminger (SECOPTA analytics GmbH)26/09/2018, 16:00CO2 reduction and energy savingOral PresentationContent ======= 1. Initial situation 2. New requirements lead to innovative analysis methods 3. Applicable applications for LIBS based smart process control 3.1 Applicable applications –LIBS on the feeding side 3.2 Applicable applications –LIBS in the melt shop 3.3 Applicable applications –LIBS in the milling, rolling and processing lines 3.4Applicable applications – LIBS in...Go to contribution page
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Prof. yaowei yu (shanghai university)26/09/2018, 16:00Canadian hematite acid pellet with low magnetite content fluxed and olivine were isothermally reduced with hydrogen and carbon monoxide at 600 to 1000℃. The course of reduction was investigated by measuring the oxygen weight loss as a function of time using a thermogravimetric analysis. Macroscopic and microscopic examination, X-ray and carbon analyses were also used to elucidate the...Go to contribution page
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Mr yuman che (Technology Center of Angang Steel Co.Ltd.，Anshan 114009，Liaoning，China)26/09/2018, 16:00Abstract: In this paper, on the basis of system of CDQ dust block test, thermal insulation performance test of CDQ dust in laboratory and industrial application is studied, the performance of CDQ dust as thermal insulation agent of molten iron and impact of [S] in iron is comprehensive analyzed, and on the performance of CDQ dust, carbonized rice husk and composite preservation agent etc is...Go to contribution page
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Dr Naoto Yasuda (Nippon Steel & Sumitomo Metal Corporation)26/09/2018, 16:20In order to formulate shrinkage behavior of sinter during softening process, the effects of load and reducing gas composition on the shrinkage rate of sinter packed bed has been investigated using a softening-melting furnace. As a result, the shrinkage rate increased with increasing the load on the packed bed in temperature range from 1000 to 1200 °C, and decreased with increasing the...Go to contribution page
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IVICA NUJIC (WIKA Alexander Wiegand SE & Co. KG)26/09/2018, 16:20Automation and digitalization in coke and ironmakingOral PresentationEfficiency, Productivity, Reliability in conjunction with Big Data analysis are key requirements to secure a competitive position in the steel industry. It all starts with the collection of data provided by sensing elements in the measurement points. Durability, repeatability and long-term stability beats oversophisticated and overpriced measurement solutions. Reliable and...Go to contribution page
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Mr Dharm Jeet Gavel (TU Delft)26/09/2018, 16:40Blast furnace productivity is limited by the resistance offered to the gas flow in the cohesive zone. Mixed use of nut coke with iron ore proved beneficial for decreasing this resistance. In present study effect of nut coke addition on the olivine iron ore pellet bed was studied under simulated blast furnace condition. Nut coke mixing degree (replacement of regular coke) varied from 0 to 40...Go to contribution page
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Dr Hamid Ghorbani (Hatch)27/09/2018, 08:30Copper staves are used in blast furnaces to protect the steel shell from process heat loads. Staves have experienced premature failures such as cracks, broken water pipes/water leakage, and abrasion related wear. Relationships between copper stave failure and stave deformation have been reported in literature. A detailed assessment methodology is presented to estimate the thermomechanical...Go to contribution page
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Dr Yury Kapelyushin (South Ural State National Research University)27/09/2018, 08:30Abstract An existing scheme of vanadium production from low-titanium magnetite concentrates is energy-consuming and associated with loss of valuable elements, e.g. titanium. The present work investigates the possibility of obtaining products, which are different from the processing using the conventional technological scheme, for further development of an energy-efficient and wasteless...Go to contribution page
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Prof. Hiroshi Nogami (Tohoku University)27/09/2018, 08:30Modelling and simulation in coke and ironmakingOral PresentationThe cohesive zone of the blast furnace generates major part of the pressure drop. It is considered that the thickness of the cohesive zone increases with decreasing the reducing agent rate and increasing the usage of the low grade raw materials in future. Thickening the cohesive zone increases the pressure drop and the failure of the blast furnace operation could occur in the extreme...Go to contribution page
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Prof. Noritaka Saito (Kyushu University)27/09/2018, 08:30Permeability at the cohesive and dripping zones in blast furnace is mainly controlled by the dripping behavior of molten slags in the cokes aggregates layer. Thus, wettability of cokes (graphite) which contains ash minerals should be one of the most important controlling factors on the dripping behavior. In the present study, the wettability of graphite-alumina composites with different...Go to contribution page
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Dr Koji Saito (Nippon Steel & Sumitomo Metals Corporation)27/09/2018, 08:50Coke degradation by the reaction with carbon dioxide is known to cause the fine particle generation, deteriorating gas and liquid permeability in a blast furnace. Coke degradation must be suppressed or controlled in order to achieve stable operation of blast furnace. In this study, the mechanism of the coke degradation by the reaction with carbon dioxide, i.e. solution loss reaction, was...Go to contribution page
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Mr Frederik Bambauer (Ruhr-Universität Bochum)27/09/2018, 08:50Modelling and simulation in coke and ironmakingOral PresentationSteelmaking following the blast furnace process route has a share of approximately 75 % of the worldwide steel production and thus is the primary source of steel. Due to the large size of blast furnaces and the extreme process conditions therein, the accessibility for measurements inside the furnace is very limited. Nevertheless, since the campaign life is closely related to the multiphase...Go to contribution page
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Mr Mahdi Farahani (ArcelorMittal.USA)27/09/2018, 08:50This article presents a novel experimental procedure that simulates the complicated counter-current DR shaft process. This lab test is recently developed in ArcelorMittal Global R&D and shows good correlation with actual direct reduction process. The method provides a unique tool to study the impact of DR plant operation parameters in the laboratory scale, and enables the study of raw...Go to contribution page
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Mr DUSTIN VICKRESS (HATCH)27/09/2018, 08:50Copper stave failure is a major cause for interim blast furnace repairs, at great cost to the blast furnace owner, primarily due to: a) abrasive wear on the exposed hot-face; b) cracking of welded pipe connections; and c) low cooling density resulting from ineffective cooling layout. Under these damaging conditions, traditional staves often begin to leak water, overheat and exhibit cascading...Go to contribution page
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Dr Mihaela Grigore (CSIRO Energy)27/09/2018, 09:10Coke reactivity is one of the most important parameters that defines coke quality. Although coal parameters such as coal rank, maceral composition and ash chemistry are used as indicators of coke reactivity, they cannot fully predict it. It is well recognized that reactivity of coke is controlled by catalytic mineral matter and its porosity, particularly its nanoporosity (pores of nm in size)....Go to contribution page
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Mr Kazuto NISHIHIRO (Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University, Japan)27/09/2018, 09:10CO-H2 mixture gas is often used for gas-based DRI process where carbon deposition reaction and Fe3C metal dusting play serious roles for a stable reduction operation. Fe3C decomposition leads to the formation of iron particles which is a catalyst for carbon fiber deposition. Because of the parallel occurrence of these reactions, kinetic analysis of them would...Go to contribution page
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Dr xuefeng Dong (Associate Research Fellow)27/09/2018, 09:10Modelling and simulation in coke and ironmakingOral PresentationIn a modern blast furnace (BF) operation, the hearth is a critical area influencing both the routine casting performance and campaign life, where the liquid flow distribution, coke bed structure and condition, and the in-service refractory profile are all contributing factors. However, direct measurement is nearly impossible because of the high temperature conditions in the hearth. In...Go to contribution page
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Mr David Osborne (Primetals Technologies Ltd)27/09/2018, 09:10> Primarily used in the high heat zones of the furnace the copper stave has proved to be a hugely popular choice for blast furnace cooling. Despite its many successes, some plants have suffered with copper stave problems in two particular areas: stave bending (leading to water leaks at back of the stave) and stave wear (erosion on the hot face). The root causes of these failures can be defined...Go to contribution page
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Mr Bert Gols (Tata Steel IJmuiden)27/09/2018, 09:30Coke quality plays an important role in the blast furnace process. The current coke quality parameters used in Tata Steel, IJmuiden are the I40, I10 and CSR. With the introduction of more different types of coals there is a need for a more detailed characterisation of the coke. Especially for the behaviour of coke in the lower parts of the blast furnace a parameter is lacking. Previous...Go to contribution page
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Andrii Kalantarenko (TeraWatt Group LLC,), Olexandr Vynohradov (M Technology LLC)27/09/2018, 09:30Throughout the past 3 years TeraWatt Group have participated in over than 30 blast furnace reconstruction projects. Over a dozen projects were focused on solving one of the most challenging issuess of the modern blast furnace process – significant standard cooling system (with untreated water) useful lifetime decrease, caused by rapid failure of cooling plates under pulverized coal injection...Go to contribution page
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Mr Mathias Vångö (Department of Particulate Flow Modelling, Johannes Kepler University, Linz)27/09/2018, 09:30Modelling and simulation in coke and ironmakingOral PresentationThe campaign length of a blast furnace is limited by the hearth inner lining lifetime. In order to maximize the campaign length and ensure a good draining of hot metal and slag, a good understanding of the flow in the hearth is essential. Challenges in modeling the flow involve several continuous phases (hot metal, slag and hot blast) as well as the presence of the deadman, a dense bed of coke...Go to contribution page
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Mr Ao Zhang (Robinson Research Institute, Victoria University of Wellington)27/09/2018, 09:30Ironsand is a potential cheap source of iron with possible other values such as titania and vanadium oxide. Direct reduction is regarded as one of the promising processes to deal with ironsand in both an economically and environmentally sustainable manner. In this study, the reduction characteristics of pelletised ironsand ore by hydrogen gas were investigated. The pelletising and sintering of...Go to contribution page
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Dr Fuming Zhang (Vice General Engineer)27/09/2018, 10:20Since 21 century, the application of copper cooling stave has been an important technical measure to prolong the campaign life of modern blast furnace. Combined with the application of blast furnace copper cooling stave at Shougang Qian’an steel plant, the optimum design of copper cooling stave heat transfer research and structure parameters are discussed. The heat transfer parameters,...Go to contribution page
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Dr Lei Guo (University of Science and Technology Beijing)27/09/2018, 10:20Due to the very fast reduction rate and its possibility to get rid of coke and other technical advantages the flash reduction iron making process has drawn a lot of concern by many experts and scholars in recent years. According to relative literatures, the derivative process of flash reduction of iron ore is analyzed. The development of the flash reduction iron making process at home and...Go to contribution page
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Mehdi Baniasadi (University of Luxembourg)27/09/2018, 10:20Modelling and simulation in coke and ironmakingOral PresentationThe blast furnace iron making is the main method to produce liquid iron. A blast furnace is charged with ore and coke from the top along with a preheated gas introduced to the furnace through the tuyeres in the lower part. The combustion of coke generates reducing gas ascending through the blast furnace to reduce iron-bearing materials. The reduced iron-bearing particles start softening...Go to contribution page
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Prof. Xin Jiang (School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110004 China)27/09/2018, 10:20Abstract: The unburned pulverized coal in the blast furnace has an effect on the slag properties, which affects the quality of the hot metal. The effect of unburned pulverized coal made from Yongcheng anthracite on slag viscosity is studied by means of high temperature melt physical characteristics synthetic test instrument, and the reason of slag viscosity change was illuminated by observing...Go to contribution page
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Prof. Tom Honeyands (The University of Newcastle Australia), Dr Xinliang Liu (The University of Newcastle Australia)27/09/2018, 10:40Many efforts have been made to investigate the softening-melting (SM) behaviour of ferrous burden material as it governs the formation of the cohesive zone (CZ) inside the ironmaking blast furnace (BF). Usually, the SM property of individual lump ore is thought to be inferior to iron ore sinter, however, it has been demonstrated that results for a mixed burden of ≈80% sinter and ≈20% lump ore...Go to contribution page
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Dario Pauluzzi (Danieli & Officine Meccaniche)27/09/2018, 10:40Compared to the traditional Blast Furnace – Basic Oxygen Furnace way of producing steel, more than 50% of CO2 emissions can saved if steel is produced by means of the Energiron Direct Reduction – Electric Arc Furnace way. This target is achieved partly thanks to the use of reducing sources cleaner than coal, and partly thanks to the selective capture of up to 90% of the CO2 produced, that can...Go to contribution page
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Mr Man Xiang zhao (Shougang Qian'an Iron & Stell Co.,Ltd.)27/09/2018, 10:40The damage of copper cooling stave in several china’s blast furnace is investigated. Furthermore, the damage mechanism has also been analyzed. It’s shows that the breakage of copper cooling stave mainly due to unstable slag skull and frequent wearing by furnace burden and gas flow, as well as improper design. Based on which some measures were suggested for prolonging the service life of copper...Go to contribution page
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Mr Ismael Flores (Universidade Federal de Minas Gerais)27/09/2018, 10:40Modelling and simulation in coke and ironmakingOral PresentationIn the blast furnace, the onset of softening and melting of ferrous burdens give origin to the region known as the cohesive zone, which is critical to process stability and performance. The softening and meltdown temperatures of ferrous burdens are usually accessed by high temperature softening melting (HTSM) apparatus, which can, to some extent, simulate the blast furnace reduction,...Go to contribution page
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Dr Alexander Babich (RWTH Aachen University)27/09/2018, 11:00The rising amount of injected through the tuyeres pulverised coal makes increasingly difficult its conversion within the raceway zones despite of numerous measures to improve gasification of coal particles. Unburnt particles can nevertheless be partly consumed outside the raceway by so called secondary conversion reactions. From this point of view, properties of char that leaves the raceway...Go to contribution page
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Prof. Marc Hölling (Hamburg University of Applied Science, Dept. of Process Engineering)27/09/2018, 11:00The future of the European steel industry demands solutions for carbon free production routes to fulfil the challenging goals of today‘s climate policies. In terms of CO2-emissions, the reduction process is the most relevant process – be it in a blast furnace or in a direct reduction plant. One solution to this issue could be the transition from fossil-based to hydrogen-based reduction of iron...Go to contribution page
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Dr Yakov Gordon (Technical Director, Hatch)27/09/2018, 11:00Modelling and simulation in coke and ironmakingOral PresentationAny expert system of blast furnace should include the following models: the model to estimate material and gas distribution and their temperatures at the furnace top based on measurements by radioisotope profile scanner (or other type) and industrial IR-camera; conditions and dimensions of the furnace raceway; slag model which allow estimate the viscosity of primary, intermediate and final...Go to contribution page
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Mr Yung Chang Ko (China Steel Corporation)27/09/2018, 11:00Modern blast furnace with long campaign life will install copper stave as its cooling element in bosh, belly and low shaft area. However, copper is not a good material for wear-resistance and deformation-resistance. The wears caused by burden material or high heat load damage make the stave thinning and leakage. Therefore, blast furnace with copper stave has to focus on its thickness. This...Go to contribution page
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Mr Robert Millner (Primetals Technologies Austria GmbH)27/09/2018, 11:20Midrex and Primetals Technologies have successfully completed their latest HBI projects for voestalpine Texas LLC/USA and LGOK/Russia. This paper discusses some further possibilities for improvements of Direct reduction plants in order to increase the plant competitiveness and/or flexibility. Such plant improvements have been either already implemented in the latest projects for the first...Go to contribution page
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Dr Alexander Babich (RWTH Aachen University)27/09/2018, 11:20The benefits of biomass usage as renewable energy source and reducing agent in the steel industry, particularly, by its injection into the blast furnace tuyeres is known. This contribution focuses on two aspects, which could increase the economic efficiency of this technology. The first one is related to the thermal treatment of biomass. Woody biomass waste and biomass residues were pyrolysed...Go to contribution page
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Mr Sergey Ivlev (KALUGIN JSC)27/09/2018, 11:20Heating of blast has been and remains one of the most important parameters which determine the economic efficiency of blast furnace production. However, for several decades the maximum level of blast temperatures remains unchanged (1200-1250°C). This shows the limited capacity of conventional hot stoves with internal and external combustion chambers. The paper presents a new unique design of...Go to contribution page
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Dr Rodrigo MAGALHÃES DE CARVALHO (Universidade Federal do Rio de Janeiro)27/09/2018, 11:20Modelling and simulation in coke and ironmakingOral PresentationTo achieve a stable and efficient blast furnace operation it is important to have a controlled gas flow inside the furnace with a proper burden distribution, thus a strict control of the particulate material size distribution inside the charge is required to avoid generation of preferential paths of the gas molecules through the burden. This work uses Discrete Element Method (DEM) to simulate...Go to contribution page
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Prof. Yongzhi Sha (China Iron and Steel Research Institute)27/09/2018, 12:40A large quantity of return fines recycling is a serious shortage of current sinter + BF ironmaking process, which causes big increases in sintering operation cost and pollutant emissions. No Return Fine (BF) Ironmaking Process (NRIP) is conceived to use return fines in BF directly, after removing minus 1 mm part of dust from it. NRIP could make sinter+BF ironmaking process more efficient and...Go to contribution page
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Mr Ka Wing Ng (Natural Resources Canada)27/09/2018, 12:40Pulverized coal injection is a commonly used practice in modern blast furnace operation. To further increase the PCI rate, a detailed understanding of gasification kinetics behavior of injected coal in tuyere and characteristics of combustion residues is critical. Using the PCI injection simulation rig at CanmetENERGY, the combustion behavior of selected typical PCI coals was examined. The...Go to contribution page
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Mr Robert Mawer (Primetals)27/09/2018, 12:40Environmental control in coke and ironmakingOral PresentationThe majority of existing blast furnaces plants use a dustcatcher as the primary process for removal of the process dust from the top gas. In recent years, there has been a trend to replace the dustcatcher with a cyclone: increasing the efficiency of dust removal, increasing the dry dust recycle to (for example) the sinter plant, and reducing the sludge volume generated from wet gas cleaning....Go to contribution page
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Dr Bernd Weiss (Primetals Technologies GmbH)27/09/2018, 12:40Modelling and simulation in coke and ironmakingOral PresentationIron and steel making requires a wide range of different raw materials significantly influencing process performance which demands a continuous optimization of process routes also with respect to energy efficiency as well as environmental emissions. Steadily changing raw material prices and qualities, market situations and product variations are challenging integrated steel plant operators in...Go to contribution page
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Mr Sang Gyun Shin (Material science and engineering, Yonsei University)27/09/2018, 13:00The Influence of pore on reduction behavior of iron oxide is very important. The pore affects the reduction gas diffusion and thus the reduction behavior is affected. However, in most studies, porosity was used only as a tool for the resultant interpretation of the reduction. There is insufficient studies to identify porosity by artificially changing pore. In this study, we investigate the...Go to contribution page
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Dr HUI CHEN (shougang Group Research Institute of Technology)27/09/2018, 13:00In recent years, dry de-dusting technology has been widely used. Alkali liquor spray scrubber was added after dry dust-catch process to removal such the corrosive medium as chlorine. However, the problem of corrosion cracking often occurred in the gas and hot blast pipes. The evaluating method was present through directly measuring the chlorine content in gas before and after alkali liquor...Go to contribution page
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Mr Andreas Steinwandter (Primetals Technology Austria GmbH)27/09/2018, 13:00Environmental control in coke and ironmakingOral PresentationThe demand for increasing energy efficiency is one of the global megatrends of our time. Although the steel industry suffers from a volatile economic environment, steel plant operators are interested to find opportunities for sustainable cost reduction. Steel mills are trying to cut electrical power and energy costs as these are among the biggest cost factors that can be influenced. The...Go to contribution page
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Mr Chao Ma (Shougang Group)27/09/2018, 13:00Modelling and simulation in coke and ironmakingOral PresentationCombustion processes of heating gas for 7.63m coke oven in Shougang were simulated by the adoption of CFD modeling. Through calculation and analysis, the following conclusions were obtained: (1) As the heating gas flow rate decreased, the average velocity of gas inside the combustion chamber was reduced; (2)When the gas flow rate in the vertical flue was reduced by 5m3/h, the average...Go to contribution page
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Dr Martina Hanel (Mettop GmbH)27/09/2018, 13:20Environmental control in coke and ironmakingOral PresentationIt is the increasing demand for an economic and cost saving operation mode that requires effective cooling in order to achieve low refractory wear and good furnace lifetime, which is making cooling technology an important aspect of furnace operation. In addition, the requirements for safety are getting more and more into focus. However, the use of water - today’s standard cooling medium - has...Go to contribution page
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Mr Michel Leite (Vale)27/09/2018, 13:20Modelling and simulation in coke and ironmakingOral PresentationDirect reduction and electric arc furnace are important routes for steel production in the world. The DRI production in 2016 was 72.8 Mt, from which 64.8% was by Midrex Process, 17.5% by coal-based, 17.4% by Hyl/Energiron and 0.3% by Other processes. The metallic charge of direct reduction is mainly composed by iron ore agglomerate in the form of pellets and the direct reduction of iron...Go to contribution page
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Mr MAHESH AGARWAL (TATA STEEL LTD.)27/09/2018, 13:20Non-drainable trough repairs are inevitable in blast furnaces, limiting the drainage facilities. This issue became a bottleneck at G blast furnace leading to a reduction in the production levels. There are two drainable troughs at G Blast furnace with a campaign life of around 160ktons. Two types of repairs are carried out; minor repair after a life of 100ktons and major repair post the trough...Go to contribution page
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Mr DONGMYUNG SEO (Hyundai Steel Company)27/09/2018, 13:20Pulverized Coal Injection (PCI) into the Blast Furnace (BF) is well-known process for cost saving of the BF. Most of the ironmaking companies are trying to enhance the amount of Pulverized Coal Ratio (PCR) for the purpose of cost reduction. Two key factors, flowability and combustibility, of pulverized coal should be estimated to achieve higher PCR under stable operation condition. The...Go to contribution page
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Prof. Haibin Zuo (University of Science and Technology Beijing)27/09/2018, 13:40Copper stave has been widely applied in large blast furnaces especially whose inner volume exceed 2000m3 due to high cooling capacity. In the past years, cooper staves suffered damages in some blast furnace, dwindling the campaign life of blast furnace. For this problem, the damage mechanism of the cooling stave was studied by analyzing the chemical composition, thermal conductivity,...Go to contribution page
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Mr Ki-Gun Hong (POSCO)27/09/2018, 13:40Environmental control in coke and ironmakingOral PresentationGwangyang No.1 blast furnace blowed in 2013 with 6,000㎥ inner volume (first half in 2017, Po 2.36t/d/㎥, RR 488.0kg/t-p), and dry-type dedusting system is installed at that time. The introduction background is electricity cost saving through TRT power generation and reducing the amount of waste water discharge, compared with wet-type dedusting system. The dedusting system of Gwangyang No.1 BF...Go to contribution page
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Dr Ansgar Schepers (Beck u. Kaltheuner Feuerfeste Erzeugnisse GmbH & Co. KG)27/09/2018, 13:40Blast furnace taphole clays can be extremely sophisticated refractory products. The correct selection is affected by several blast furnace operating factors. The complexity of these formulations mirrors the multitude of often conflicting properties and characteristics that are demanded from the modern day taphole clay, e.g. refractory properties, plasticity, erosion stability and the...Go to contribution page
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Mr Christian de Gruiter (Paul Wurth S.A.), Mr Cristiano Castagnola (PW Italia S.P.A)27/09/2018, 14:00The Bell Less Top Charging System invented and developed by Paul Wurth, is commonly recognized as Best Available Technology in the domain of blast furnace charging. This paper describes how the 2nd gen Bell Less Top, combined with stockhouse improvements and intelligent sampling devices can be used in order to expand blast furnace charging process know-how and to further optimize Blast Furnace...Go to contribution page
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Kyohei Suzuki (JFE Steel)27/09/2018, 14:00Improved permeability and increased gas utilization have been desired in order to achieve low coke rate operation of blast furnaces. Coke mixed charging in the ore layer is one measure for realizing these improvements. A new charging technique for mixing nut coke in the ore layer at a blast furnace with a center feed type bell-less top was developed and investigated in an experiment with a...Go to contribution page
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Mr Yue Wu (Chongqing University)27/09/2018, 14:00Environmental control in coke and ironmakingOral PresentationNantong coal (NTC) and Laigang coal (LGC), the two typical high-sulfur coking coal in China, were investigated on their desulfurization processes with the addition of NaOH-H2O2 under microwave treatment. X-ray diffraction (XRD), inductively coupled plasma (ICP) and fourier transform infrared (FT-IR) were performed to unravel the migration of organic sulfur in the two coal. In addition, the...Go to contribution page
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