COREX预还原竖炉反应进程的物理模拟  

Physical simulation of reaction progress in COREX shaft furnace

作　　者：应伟峰[1] 孙野[1] 罗志国[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《材料与冶金学报》2010年第1期1-6,共6页Journal of Materials and Metallurgy

摘　　要：COREX工艺主要由预还原竖炉和熔化气化炉两部分组成,预还原竖炉作为气-固逆流式反应器,炉内铁氧化物的还原情况至关重要,关系到整个流程的生产效益.本文通过建立1∶20的半圆周冷态模型,利用硅胶吸水逐渐变色的特性进行预还原竖炉内气-固反应进程的可视化模拟实验,测定了不同气体流量下填充床内铁矿石的还原情况.结果表明炉内径向铁矿石还原率相差较大,随着气体流量增大而炉内气-固反应进程加快,反应进程在轴向、径向上很不均匀.COREX process is composed of a reduction shaft furnace and a smelter-gasifier furnace.The shaft furnace is a typical gas-solid countercurrent reaction device,so the reduction condition of iron oxides in shaft furnace is of crucial importance,and it determines the efficiency of whole process.In order to discuss the reduction degree of the product at the different gas-flow rates,the process was studied through a 1∶20 semi-circle cold model visual experiment,with allochroic silica gel.The result shows that the reduction degree of the ore is different in the radial direction position of the model.The reaction rate between solid and gas varies with the gas-flow rate.The reduction is nonuniform in both axial and radial directions.

关 键 词：预还原竖炉 气-固反应进程 可视化实验 物理模拟 

分 类 号：TF557[冶金工程—钢铁冶金]