KR法中桨叶结构对搅拌效率影响的数值模拟研究  

Numerical simulation of the effect of blade structure on mixing efficiency in KR method

作　　者：晏颖 孙伟 贾舒渊 商少伟 吴志豪 欧阳德刚 贺铸[1,2] YAN Ying;SUN Wei;JIA Shuyuan;SHANG Shaowei;WU Zhihao;OUYANG Degang;HE Zhu(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Baosteel Central Research Institute(Qingshan),Wuhan 430083,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [3]宝钢股份中央研究院(青山),湖北武汉430083

出　　处：《炼钢》2023年第6期8-14,29,共8页Steelmaking

基　　金：国家自然科学基金资助项目(51974211)。

摘　　要：KR法是铁水预处理中主流的脱硫方法。采用数值模拟方法研究了正四叶桨、螺旋三叶桨和双层正四叶桨三种桨叶的搅拌效率,结果表明:双层正四叶桨的混匀时间比正四叶桨短7.3%,比螺旋三叶桨短37.9%;通过对铁水中轴向速度、湍动能分布的分析发现,双层正四叶桨搅拌器中铁水轴向速度更大,并且铁水中湍动能广泛扩散,双层正四叶桨的平均湍动能比正四叶桨大28%,比螺旋三叶桨大1.8%。KR(Kanbara Reactor)method is the mainstream desulfurization method in hot metal pretreatment.The mixing efficiency of three kinds of blades,namely,the regular four-blade propeller,the spiral three-blade propeller and the double-layer regular four-blade propeller,was studied by numerical simulation method.The results showed that the mixing time of the double-layer regular four-blade propeller was 7.3%shorter than that of the regular four-blade propeller,and 37.9%shorter than that of the spiral three-blade propeller.Through the analysis of the axial velocity and turbulent kinetic energy distribution in the molten iron,it was found that the axial velocity of the molten iron in the double-layer regular four-blade propeller agitator was larger,and the turbulent kinetic energy in the molten iron was widely diffused.The average turbulent kinetic energy of double-layer regular four-blade propeller was 28%greater than that of regular four-blade propeller and 1.8%greater than that of spiral three-blade propeller.

关 键 词：KR脱硫 混匀时间 湍动能 轴向速度 数值模拟 

分 类 号：TF535.22[冶金工程—钢铁冶金]