煤粉与熔剂混合喷吹管道偏析行为的数值模拟  

Numerical simulation for segregation behavior of pulverized coal and flux mixed injection pipeline

作　　者：王凯 何晓霞 赵满祥[4] 张建良[1] 贾国利[5] 徐润生[1] WANG Kai;HE Xiao-xia;ZHAO Man-xiang;ZHANG Jian-liang;JIA Guo-li;XU Run-sheng(School of Metallurgy and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Shougang Co.,Ltd.,Beijing 100041,China;State Key Laboratory of Advanced Iron and Steel Metallurgy Technology,University of Science and Technology Beijing,Beijing 100083,China;Qianshun Technology Center,Beijing Shougang Co.,Ltd.,100041,China;Ironmaking Operation Department,Beijing Shougang Co.,Ltd.,Beijing 100041,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京首钢股份有限公司,北京100041 [3]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [4]北京首钢股份有限公司迁顺技术中心,北京100041 [5]北京首钢股份有限公司炼铁作业部,北京100041

出　　处：《中国冶金》2023年第5期37-43,共7页China Metallurgy

基　　金：安徽省重点研发计划资助项目(202210700037);国家自然科学基金资助项目(52274316)。

摘　　要：为了探究高炉煤粉与熔剂混合喷吹时的偏析行为,对高炉喷吹煤粉和熔剂取样并进行测试,得到喷吹煤粉的工业分析结果和元素分析结果,以及煤粉和熔剂的成分检测结果。在此基础上使用Fluent软件对喷吹煤粉与熔剂混合喷吹输送过程中的不同颗粒沉降规律进行数值模拟分析,解析熔剂添加量、载气速度以及管道长度对偏析的影响。试验结果表明,熔剂添加量对偏析的影响较小;随着载气速度的增大,偏析程度逐渐降低;管道越长,受偏析影响的粉煤量也越多。因此,提高载气速度有助于抑制偏析;管道过长不仅会增加颗粒的沉降度,还会加大偏析的影响。研究结果可为煤粉和熔剂混合喷吹技术的应用提供指导。In order to explore the segregation behavior for mixed injection of pulverized coal and flux in blast furnace,the pulverized coal and flux were sampled and tested,and the industrial analysis results and elemental analysis results of pulverized coal were obtained,as well as the composition detection results of pulverized coal and flux.On this basis,Fluent software was used to numerically simulate and analyze the sedimentation law of different particles during the mixed injection and conveying process of pulverized coal and flux,and the effects of flux addition,carrier gas velocity and pipeline length on segregation were analyzed.The results show that the flux addition has little effect on the segregation.With the increase of carrier gas velocity,the degree of segregation gradually decreases.The longer the pipeline,the more pulverized coal is affected by segregation.Therefore,increasing the carrier gas velocity helps to suppress segregation.Excessive pipe length will not only increase the degree of particles sedimentation,but also increase the influence of segregation.The research results can provide guidance for the application of pulverized coal and flux mixed injection technology.

关 键 词：煤粉 熔剂 混合喷吹 气力输送 偏析 数值模拟 

分 类 号：TF538.6[冶金工程—钢铁冶金]