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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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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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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 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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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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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 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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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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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 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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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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