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Dr Yakov Gordon (GTechnical Director, I & S. Hatch)25/09/2018, 10:45Blast furnace ironmakingOral PresentationIntensive 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 Anrin Bhattacharyya (Montanuniversitaet Leoben)25/09/2018, 11:05Blast furnace ironmakingOral PresentationCoke, 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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Rudolf Hebel (Paul Wurth Deutschland GmbH)25/09/2018, 11:25Blast furnace ironmakingOral PresentationSignificant 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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Dr Afshin Sadri (Hatch Global Director of Non-Destructive Testing (NDT) Group)25/09/2018, 11:45Blast furnace ironmakingOral PresentationThe 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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Mrs BEATRIZ FAUSTA GANDRA (USIMINAS)25/09/2018, 14:30Blast furnace ironmakingOral PresentationIn 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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Dr Mikko Helle (ร bo Akademi University)25/09/2018, 14:50Blast furnace ironmakingOral PresentationA 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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Mr Ujjal Ghosh (Tata Steel)25/09/2018, 15:10Blast furnace ironmakingOral PresentationTuyere 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 โ 2300...Go to contribution page
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Mr Ian Cameron (Hatch Ltd.), Dr Mitren Sukhram (Hatch Ltd.)25/09/2018, 15:30Blast furnace ironmakingOral PresentationHot 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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Johanna Alatalo (LKAB - Research & Development)25/09/2018, 16:15Iron ore production and handlingOral PresentationSince 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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Dr Daisuke Maruoka (Graduate School of Environmental Studies, Tohoku University)25/09/2018, 16:35Blast furnace ironmakingOral PresentationSilico-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 Yuman CHE (Ansteel Group)25/09/2018, 16:55Blast furnace ironmakingOral PresentationAbstract: 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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Dr Maarten Geerdes (Geerdes Advies)25/09/2018, 17:15Blast furnace ironmakingOral PresentationThe 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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Dieter Bettinger (Primetals Technologies Austria GmbH)26/09/2018, 09:00Blast furnace ironmakingOral PresentationThe 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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Prof. Zhengkai Gao (University of Science & Technology Beijing)26/09/2018, 09:00Blast furnace ironmakingOral PresentationAbstract: 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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Dr Maarten Geerdes (Geerdes Advies)26/09/2018, 09:20Blast furnace ironmakingOral PresentationThe 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, 09:20Blast furnace ironmakingOral PresentationChanges 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, 09:40Blast furnace ironmakingOral PresentationA 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, 09:40Blast furnace ironmakingOral PresentationTo 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 Yakov Gordon (Technical Director, Hatch)26/09/2018, 10:00Blast furnace ironmakingOral PresentationThe 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, 10:00Blast furnace ironmakingOral PresentationIn 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, 10:50Blast furnace ironmakingOral PresentationLow 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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Prof. Fengman Shen (School of Metallurgy, Northeastern University,Shenyang, Liaoning 110004 China)26/09/2018, 10:50Smelting reductionOral Presentation**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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Mrs Amanda Gullberg (Swerea MEFOS AB)26/09/2018, 11:10Blast furnace ironmakingOral PresentationIn 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, 11:10SinteringOral PresentationFor 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 Gi Ho La (Department of MSE, Yonsei Univ., Seoul Korea)26/09/2018, 11:30Iron ore production and handlingOral PresentationLimonitic 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)Oโ(OH)โH2O. 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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Mr Gang Li (Chongqing University)26/09/2018, 11:30Smelting reductionOral PresentationIn the current work, the reduction route of CaOยทFe2O3 (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 10Kยทminโ1 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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Mr chunlong wang (Capital Engineering ๏ผResearch Incorporation Limited)26/09/2018, 11:50Blast furnace ironmakingOral PresentationHearth 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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Dr James Small (Tata Steel, IJmuiden, Netherlands)26/09/2018, 11:50SinteringOral PresentationAdvanced 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, 13:30Smelting reductionOral PresentationAbstract: 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 Mingyin Kou (University of Science and Technology Beijing)26/09/2018, 13:30Blast furnace ironmakingOral PresentationThe 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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Dr Liming Lu (CSIRO)26/09/2018, 13:50Blast furnace ironmakingOral PresentationBlast 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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Prof. Zhengkai Gao (University of Science & Technology Beijing)26/09/2018, 14:10Blast furnace ironmakingOral PresentationAbstract: 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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Thomas Bรผrgler (voestalpine Stahl GmbH)26/09/2018, 14:30Blast furnace ironmakingOral PresentationDirect 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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Mr Vladan Andrejic (HBIS GROUP Serbia Iron & Steel)26/09/2018, 14:50Blast furnace ironmakingOral PresentationHBIS 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 Dmitrii Tikhonov (DDG cooperation technologies)26/09/2018, 16:00Blast furnace ironmakingOral PresentationIncrease 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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Dr Naoto Yasuda (Nippon Steel & Sumitomo Metal Corporation)26/09/2018, 16:20Blast furnace ironmakingOral PresentationIn 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 ยฐC, and decreased with increasing the...Go to contribution page
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Mr Dharm Jeet Gavel (TU Delft)26/09/2018, 16:40Blast furnace ironmakingOral PresentationBlast 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, 08:30Blast furnace ironmakingOral PresentationCopper 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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Prof. Noritaka Saito (Kyushu University)27/09/2018, 08:30Blast furnace ironmakingOral PresentationPermeability 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, 08:50Blast furnace ironmakingOral PresentationCoke 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 DUSTIN VICKRESS (HATCH)27/09/2018, 08:50Blast furnace ironmakingOral PresentationCopper 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, 09:10Blast furnace ironmakingOral PresentationCoke 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 David Osborne (Primetals Technologies Ltd)27/09/2018, 09:10Blast furnace ironmakingOral Presentation> 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, 09:30Blast furnace ironmakingOral PresentationCoke 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, 09:30Blast furnace ironmakingOral PresentationThroughout 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 โ 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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Dr Fuming Zhang (Vice General Engineer)27/09/2018, 10:20Blast furnace ironmakingOral PresentationSince 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 Qianโan 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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Prof. Xin Jiang (School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110004 China)27/09/2018, 10:20Iron ore production and handlingOral PresentationAbstract: 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, 10:40Blast furnace ironmakingOral PresentationMany 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 โ80% sinter and โ20% lump ore...Go to contribution page
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Mr Man Xiang zhao (Shougang Qian'an Iron & Stell Co.,Ltd.)27/09/2018, 10:40Blast furnace ironmakingOral PresentationThe damage of copper cooling stave in several chinaโs blast furnace is investigated. Furthermore, the damage mechanism has also been analyzed. Itโs 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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Dr Alexander Babich (RWTH Aachen University)27/09/2018, 11:00Blast furnace ironmakingOral PresentationThe 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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Mr Yung Chang Ko (China Steel Corporation)27/09/2018, 11:00Iron ore production and handlingOral PresentationModern 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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Dr Alexander Babich (RWTH Aachen University)27/09/2018, 11:20Blast furnace ironmakingOral PresentationThe 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, 11:20Blast furnace ironmakingOral PresentationHeating 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 (1200-1250ยฐC). 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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Prof. Yongzhi Sha (China Iron and Steel Research Institute)27/09/2018, 12:40Blast furnace ironmakingOral PresentationA 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, 12:40Blast furnace ironmakingOral PresentationPulverized 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 Sang Gyun Shin (Material science and engineering, Yonsei University)27/09/2018, 13:00Iron ore production and handlingOral PresentationThe 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, 13:00Blast furnace ironmakingOral PresentationIn 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 MAHESH AGARWAL (TATA STEEL LTD.)27/09/2018, 13:20Blast furnace ironmakingOral PresentationNon-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, 13:20Blast furnace ironmakingOral PresentationPulverized 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, 13:40Blast furnace ironmakingOral PresentationCopper 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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Dr Ansgar Schepers (Beck u. Kaltheuner Feuerfeste Erzeugnisse GmbH & Co. KG)27/09/2018, 13:40Blast furnace ironmakingOral PresentationBlast 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, 14:00Blast furnace ironmakingOral PresentationThe 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, 14:00Blast furnace ironmakingOral PresentationImproved 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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