含锌粉尘内配碳球团还原模型  

Reduction model of carbon-containing pellets made of zinc-bearing dust

作　　者：安秀伟[1] 王静松[1] 佘雪峰[1] 丁银贵[1] 薛庆国[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《北京科技大学学报》2013年第2期155-160,共6页Journal of University of Science and Technology Beijing

基　　金：国家科技支撑计划资助项目(2008BAB32B05)

摘　　要：以转底炉处理钢铁厂含锌粉尘为背景,结合转底炉实际生产工艺条件,建立了含锌粉尘内配碳球团直接还原一维非稳态数学模型.模型不仅考虑了铁氧化物的还原反应和碳的气化反应,还加入了氧化锌的还原反应,并通过实验验证了模型的准确性.利用计算结果分析讨论了炉温、球团半径及孔隙率对球团还原的影响.炉温对球团的金属化率和脱锌率均有显著影响,孔隙率和球团半径仅对球团的金属化率影响较小,而对脱锌率基本没有影响.Taking the treatment of zinc-bearing dust by rotary hearth furnaces （RHF） as the a direct reduction mathematical model of carbon-containing pellets made of zinc-bearing dust was built in combination with the actual production process of RHF. The model takes into account not only the reduction of iron oxides and Boudouard reaction but also the reduction of zinc oxide. Experimental results proved the validity of the model. The effects of furnace temperature, pellet radius and porosity on the reduction of the pellets were investigated on the basis of calculation data by the model. Furnace temperature has significant effect on the metallization rate and zinc removal rate; but pellet radius and porosity have less influence on metallization rate and no influence on the zinc removal rate.

关 键 词：粉尘 球团 冶金炉 矿石还原 动力学 数学模型 

分 类 号：TF046[冶金工程—冶金物理化学]