布料制度对COREX CGD竖炉内气流分布影响的数值模拟  

Numerical modeling for effect of charging pattern on gas distribution in COREX shaft furnace with CGD

作　　者：张兴胜 邹宗树[1,2] 周恒 李海峰 罗志国[1,2] Zhang Xingsheng;Zou Zongshu;Zhou Heng;Li Haifeng;Luo Zhiguo(Key Laboratory of Ecological Utilization of Multi-Metal Intergrown ores,Ministry of Education, Northeastern University, Shenyang 110819, China;School of Metallurgy, Northeastern University, Shenyang 110819, China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]东北大学多金属共生矿生态利用教育部重点实验室,沈阳110819 [2]东北大学冶金学院,沈阳110819 [3]北京科技大学冶金与生态学院,北京100083

出　　处：《材料与冶金学报》2019年第1期19-24,共6页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(51574064)

摘　　要：为研究布料制度对COREX CGD预还原竖炉内煤气流分布的影响,本文建立三维数学模型对不同布料制度条件下CGD竖炉内气流速度分布、压差分布及煤气反窜比例进行了模拟研究.计算结果表明,对比中心布料制度,多环布料制度抑制了炉料偏析,使床层空隙度分布更加均匀,改善了竖炉中心煤气分布。多环布料制度增加了炉内压差并抑制了煤气反窜。随着布料档位外移,压差由35 053 Pa增至36 451 Pa,煤气反窜比例由15.64%降至13.68%.A three-dimensional mathematical model was developed to investigate the effect of charging pattern on the gas distribution in the COREX shaft furnace with CGD,included the distributions of gas velocity,differential pressure and the ratio of DRI pipe gas.The results showed that,compared with the center charging pattern,the multi-loop charging pattern can inhabit the particle segregation and can make the bed voidage more uniform,so it improved the distribution of gas flow in the center of the furnace.The multi-loop charging pattern increases the gas differential pressure and restrains the ratio of DRI pipe gas.With the charging radius moving outward,the gas differential pressure increases from 35053 Pa to 36451 Pa and the ratio of DRI pipe gas decreases from 15.64%to 13.68%.

关 键 词：COREX竖炉 CGD 布料制度 气流分布 反窜煤气 数值模拟 

分 类 号：TF557[冶金工程—钢铁冶金]