COREX CGD竖炉内煤气流分布的数值模拟  

Numerical simulation of gas distribution in COREX shaft furnace with CGD

作　　者：张兴胜 邹宗树[1,2] 周恒 王春松 邢力勇 罗志国 Zhang Xingsheng;Zou Zongshu;Zhou Heng;Wang Chunsong;Xing Liyong;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》2018年第3期166-170,共5页Journal of Materials and Metallurgy

基　　金：国家自然科学基金(51574064)

摘　　要：为研究COREX CGD预还原竖炉内煤气流分布特点,本文建立三维数学模型对CGD竖炉内气流速度分布、压差分布及煤气反窜进行了数值模拟研究.结果表明,CGD装置的安装减小了竖炉底部的煤气流动滞止区,有利于气固相间的传热传质.此外,CGD装置的安装还可降低炉内压差,抑制煤气反窜.对比1#C-3000竖炉,CGD竖炉压差由35066 Pa降至32532 Pa,煤气反窜比例由17. 39%降至15. 64%.A three-dimensional mathematical model was developed to investigate the characteristics of gas flow distribution in the COREX shaft furnace with CGD,including the distributions of gas velocity,differential pressure,as well as the ratio of DRI pipe gas.The results showed that the installment of CGD decreases the gas flow inactive zone at the bottom of the furnace,which is beneficial to the heat and mass transfers between the gas and solid phases.In addition,the installment of CGD not only reduces the differential pressure,but also restrains the gas flow through the DRI pipe.Compared with the 1#C-3000 shaft furnace,the difference pressure of the CGD shaft furnace decreases from 35066 Pa to 32532 Pa and the ratio of DRI pipe gas decreases from 17.39%to 15.64%.

关 键 词：COREX竖炉 中心供气(CGD) 气流分布 压差 数值模拟 

分 类 号：TF557[冶金工程—钢铁冶金]