Influence of hydrogen concentration on Fe2O3 particle reduction in fluidized beds under constant drag force
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第1期
论文作者：Lei Guo Han Gao Jin-tao Yu Zong-liang Zhang Zhan-cheng Guo
文章页码：12 - 20
摘 要：The fixed-gas drag force from a model calculation method that stabilizes the agitation capabilities of different gas ratios was used to explore the influence of temperature and hydrogen concentration on fluidizing duration,metallization ratio,utilization rate of reduction gas,and sticking behavior.Different hydrogen concentrations from 5vol%to 100vol%at 1073 and 1273 K were used while the drag force with the flow of N2 and H2(N2:2 L·min-1;H2:2 L·min-1) at 1073 K was chosen as the standard drag force.The metallization ratio,mean reduction rate,and utilization rate of reduction gas were observed to generally increase with increasing hydrogen concentration.Faster reduction rates and higher metallization ratios were obtained when the reduction temperature decreased from 1273 to 1073 K.A numerical relation among particle diameter,particle drag force,and fluidization state was plotted in a diagram by this model.
Lei Guo，Han Gao，Jin-tao Yu，Zong-liang Zhang，Zhan-cheng Guo
State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing
摘 要：The fixed-gas drag force from a model calculation method that stabilizes the agitation capabilities of different gas ratios was used to explore the influence of temperature and hydrogen concentration on fluidizing duration,metallization ratio,utilization rate of reduction gas,and sticking behavior.Different hydrogen concentrations from 5vol%to 100vol%at 1073 and 1273 K were used while the drag force with the flow of N2 and H2(N2:2 L·min-1;H2:2 L·min-1) at 1073 K was chosen as the standard drag force.The metallization ratio,mean reduction rate,and utilization rate of reduction gas were observed to generally increase with increasing hydrogen concentration.Faster reduction rates and higher metallization ratios were obtained when the reduction temperature decreased from 1273 to 1073 K.A numerical relation among particle diameter,particle drag force,and fluidization state was plotted in a diagram by this model.
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