The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Jingsong Wang - One of the best experts on this subject based on the ideXlab platform.
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coal flow and combustion characteristics under Oxygen enrichment way of Oxygen coal double Lance
Applied Thermal Engineering, 2017Co-Authors: Zhenfeng Zhou, Qingguo Xue, Guang Wang, Xuefeng She, Jingsong WangAbstract:Abstract Under great economic and environmental pressure, to further increase the pulverized coal rate and decrease the coke rate has been an urgent task for the production of the blast furnace. Compared to other methods, Oxygen-enrichment is a simpler, more effective and more economical method for increasing the pulverized coal rate. However, the effect of conventional Oxygen-enrichment in hot blast on coal combustion is less. The local Oxygen-enrichment way can increase the Oxygen concentration around the coal particles significantly, very benefiting coal combustion. However, the room-temperature Oxygen also has some adverse effect on coal combustion. Therefore, a proper local Oxygen-enrichment method is necessary for further increase of the pulverized coal rate. The coal combustion under local Oxygen-enrichment becomes more complex. To further increase the coal burnout and understand the Oxygen-coal combustion characteristic, in this study, a three dimensional model is developed to simulate the coal/Oxygen Lance-blowpipe-tuyere-raceway of a blast furnace. The effect of local Oxygen-enrichment method of Oxygen-coal double Lance on coal combustion is investigated in detail. The simulation results show that the local Oxygen-enrichment way of Oxygen-coal double Lance is very beneficial to coal combustion. The maximum increase of the coal burnout is about 12.84%.
Zhenfeng Zhou - One of the best experts on this subject based on the ideXlab platform.
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coal flow and combustion characteristics under Oxygen enrichment way of Oxygen coal double Lance
Applied Thermal Engineering, 2017Co-Authors: Zhenfeng Zhou, Qingguo Xue, Guang Wang, Xuefeng She, Jingsong WangAbstract:Abstract Under great economic and environmental pressure, to further increase the pulverized coal rate and decrease the coke rate has been an urgent task for the production of the blast furnace. Compared to other methods, Oxygen-enrichment is a simpler, more effective and more economical method for increasing the pulverized coal rate. However, the effect of conventional Oxygen-enrichment in hot blast on coal combustion is less. The local Oxygen-enrichment way can increase the Oxygen concentration around the coal particles significantly, very benefiting coal combustion. However, the room-temperature Oxygen also has some adverse effect on coal combustion. Therefore, a proper local Oxygen-enrichment method is necessary for further increase of the pulverized coal rate. The coal combustion under local Oxygen-enrichment becomes more complex. To further increase the coal burnout and understand the Oxygen-coal combustion characteristic, in this study, a three dimensional model is developed to simulate the coal/Oxygen Lance-blowpipe-tuyere-raceway of a blast furnace. The effect of local Oxygen-enrichment method of Oxygen-coal double Lance on coal combustion is investigated in detail. The simulation results show that the local Oxygen-enrichment way of Oxygen-coal double Lance is very beneficial to coal combustion. The maximum increase of the coal burnout is about 12.84%.
Zongshu Zou - One of the best experts on this subject based on the ideXlab platform.
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coalescence characteristics of supersonic jets from multi nozzle Oxygen Lance in steelmaking bof
Steel Research International, 2015Co-Authors: Shibo Kuang, Zongshu ZouAbstract:Hydrodynamic behaviors of multiple supersonic jets, especially their coalescence, are of paramount importance to effective design and operation of the Oxygen Lance in steelmaking basic Oxygen furnace (BOF) but not well understood. This paper presents a numerical study on the coalescence of supersonic jets from the multi-nozzle Oxygen Lance at a practical Mach number by a compressible and non-isothermal computational fluid dynamics model. The model is firstly validated and then used to study the effects of key variables (i.e. ambient temperature and arrangement of nozzles including inclination angle and number) on coalescence behavior under various operational conditions. The results show that the jets prefer to deviate from their own nozzle axes and tend to coalescence with decreasing ambient temperature/nozzle inclination angle or increasing nozzle number. The attenuations of the velocity and dynamic pressure at the jet centerline are delayed with the increase of ambient temperature or the decrease of nozzle number/inclination angle. The critical condition where the jets are free from interaction is identified with increasing nozzle inclination angle, and the critical value is 25° for the four-nozzle Lance considered. The simulation results are then used to estimate the cavity shape and splashing modes in BOFs.
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effect of operation parameters on supersonic jet behaviour of bof six nozzle Oxygen Lance
Ironmaking & Steelmaking, 2014Co-Authors: Zongshu ZouAbstract:AbstractA three-dimensional mathematical model of compressible supersonic free surrounding jets from six convergent–divergent nozzles Oxygen Lance was developed based on the Reynolds averaged Navier–Stokes equations. The modelling results were validated by experiment. A comparison between the standard k∼ω turbulence model and realisable k∼ϵ was carried out, and it shows that the standard k∼ω turbulence model is superior in being able to depict the flow characters of multiple jets. The effects of nozzle inclination angle and operation pressure on jet flow characteristics and coalescence behaviour were investigated, and the mechanism of jet coalescence is discussed. The results show that coalescence patterns of six nozzle jets are strongly affected by the inclination angle but hardly by the operation pressure. When jets impinge on the melt surface in a BOF, the nozzle inclination angle plays also an important role in the splashing phenomena and the shape of cavity. It can be expected that when the nozzle in...
Qingguo Xue - One of the best experts on this subject based on the ideXlab platform.
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coal flow and combustion characteristics under Oxygen enrichment way of Oxygen coal double Lance
Applied Thermal Engineering, 2017Co-Authors: Zhenfeng Zhou, Qingguo Xue, Guang Wang, Xuefeng She, Jingsong WangAbstract:Abstract Under great economic and environmental pressure, to further increase the pulverized coal rate and decrease the coke rate has been an urgent task for the production of the blast furnace. Compared to other methods, Oxygen-enrichment is a simpler, more effective and more economical method for increasing the pulverized coal rate. However, the effect of conventional Oxygen-enrichment in hot blast on coal combustion is less. The local Oxygen-enrichment way can increase the Oxygen concentration around the coal particles significantly, very benefiting coal combustion. However, the room-temperature Oxygen also has some adverse effect on coal combustion. Therefore, a proper local Oxygen-enrichment method is necessary for further increase of the pulverized coal rate. The coal combustion under local Oxygen-enrichment becomes more complex. To further increase the coal burnout and understand the Oxygen-coal combustion characteristic, in this study, a three dimensional model is developed to simulate the coal/Oxygen Lance-blowpipe-tuyere-raceway of a blast furnace. The effect of local Oxygen-enrichment method of Oxygen-coal double Lance on coal combustion is investigated in detail. The simulation results show that the local Oxygen-enrichment way of Oxygen-coal double Lance is very beneficial to coal combustion. The maximum increase of the coal burnout is about 12.84%.
Guang Wang - One of the best experts on this subject based on the ideXlab platform.
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coal flow and combustion characteristics under Oxygen enrichment way of Oxygen coal double Lance
Applied Thermal Engineering, 2017Co-Authors: Zhenfeng Zhou, Qingguo Xue, Guang Wang, Xuefeng She, Jingsong WangAbstract:Abstract Under great economic and environmental pressure, to further increase the pulverized coal rate and decrease the coke rate has been an urgent task for the production of the blast furnace. Compared to other methods, Oxygen-enrichment is a simpler, more effective and more economical method for increasing the pulverized coal rate. However, the effect of conventional Oxygen-enrichment in hot blast on coal combustion is less. The local Oxygen-enrichment way can increase the Oxygen concentration around the coal particles significantly, very benefiting coal combustion. However, the room-temperature Oxygen also has some adverse effect on coal combustion. Therefore, a proper local Oxygen-enrichment method is necessary for further increase of the pulverized coal rate. The coal combustion under local Oxygen-enrichment becomes more complex. To further increase the coal burnout and understand the Oxygen-coal combustion characteristic, in this study, a three dimensional model is developed to simulate the coal/Oxygen Lance-blowpipe-tuyere-raceway of a blast furnace. The effect of local Oxygen-enrichment method of Oxygen-coal double Lance on coal combustion is investigated in detail. The simulation results show that the local Oxygen-enrichment way of Oxygen-coal double Lance is very beneficial to coal combustion. The maximum increase of the coal burnout is about 12.84%.
