Numerical Simulation of Thermal and Iron Ore Reduction Conditions in Pre-reduction Shaft Furnace Based on Reducing Gas Composition and Temperature  

作　　者：徐健 吴胜利 郭新颖 寇明银 

机构地区：[1]School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

出　　处：《Journal of Shanghai Jiaotong university(Science)》2011年第3期375-379,共5页上海交通大学学报（英文版）

摘　　要：Based on the principles of mass,momentum and heat transfers between the reducing gas and the iron ore solid,a two-dimensional mathematical model for above two phases is established to study the influences of reducing gas composition on thermal and reduction conditions in pre-reduction shaft furnace with the temperature ranging from 1 023 to 1 223 K.Due to the strong endothermic effect of iron ore reduction participated by hydrogen （H2）,increasing the ratio of carbon monoxide（CO）to H2 enlarges high temperature zone under present calculation conditions,thus improves reduction efficiency inside the furnace.In addition,replacing of the reducing gas with an appropriate proportion of nitrogen（N2）featuring the same temperature has a potential to reduce fuel consumption by as much as 6.5%while the products of similar quality are yielded.Based on the principles of mass, momentum and heat transfers between the reducing gas and the iron ore solid, a two-dimensional mathematical model for above two phases is established to study the influences of reducing gas composition on thermal and reduction conditions in pre-reduction shaft furnace with the temperature ranging from 1023 to 1223 K. Due to the strong endothermic effect of iron ore reduction participated by hydrogen （H2）, increasing the ratio of carbon monoxide （CO） to H2 enlarges high temperature zone under present calculation conditions, thus improves reduction efficiency inside the furnace. In addition, replacing of the reducing gas with an appropriate proportion of nitrogen （N2） featuring the same temperature has a potential to reduce fuel consumption by as much as 6.5% while the products of similar quality are yielded.

关 键 词：mathematical model reducing gas composition thermal state METALLIZATION shaft furnace 

分 类 号：TF533.1[冶金工程—钢铁冶金]