全氢竖炉内气流分布特性的数值模拟  

Numerical modeling of gas distribution characteristics in a H2 shaft furnace

作　　者：余珊 孙野[1,2] 陈韧 邵磊[3] 邹宗树 Yu Shan;Sun Ye;Chen Ren;Shao Lei;Zou Zongshu(School of Metallurgy Engineering,Liaoning Institute of Science and Technology,Benxi 117004,China;Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore,Benxi 117004,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]辽宁科技学院冶金工程学院,辽宁本溪117004 [2]辽宁省低品位非伴生铁矿优化应用重点实验室,辽宁本溪117004 [3]东北大学冶金学院,沈阳110819

出　　处：《材料与冶金学报》2022年第6期391-395,447,共6页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(51604068,5150456)。

摘　　要：采用数值模拟方法对氢气竖炉内的气流分布特性进行解析,具体考察了竖炉底部中心辅助供气对炉内气相流动和压力分布等的影响.研究结果表明:实施中心辅助供气可有效提高氢气竖炉底部的气相速度,当中心供气比由0.05提高至0.20时,竖炉中心处气相速度的最小值从6.3 m/s增大至9.3 m/s;中心供气比的提高对竖炉内围管平面以上的气压分布影响不明显;对竖炉生产而言,压缩气体所需的总能耗随中心供气比的增大先降低后升高,中心供气比为0.10时达到最低,约为345 MJ/t.With the intent to analyze gas distribution characteristics in a H_(2) shaft furnace,a numerical model was utilized in the present paper to investigate the influence of supplementary central gas supply(CGS)on the furnace performance mainly in terms of in-furnace gas phase flow and pressure distribution.The results show that gas phase flowin the bottom region of the furnace can be promoted effectively with the application of CGS.When the proportion of CGS increases from 0.05 to 0.20,the minimal value of gas velocity at the furnace centerline rises from 6.3 m/s to 9.3 m/s.However,an increase in the proportion of CGS was seen to impose an inconspicuous effect on pressure distribution above the pipeline level.As for the shaft furnace production,the total energy requirement for gas compression was found to drop and then riseas the proportion of CGS increases.A minimum of the total energy requirement,which is around 345 MJ/t,is approached when the proportion of CGS is 0.10.

关 键 词：全氢竖炉 气流分布 数值模拟 直接还原 氢冶金 

分 类 号：TF572[冶金工程—钢铁冶金]