120 t转炉顶底复吹过程多相流数值模拟研究  

Numerical simulation of multiphase flow in the top-bottom combined blowing process of 120 t converter

作　　者：罗康 辛同泽 魏代春 王栋 王峥 王敏[1,2] LUO Kang;XIN Tongze;WEI Daichun;WANG Dong;WANG Zheng;WANG Min(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting,University of Science and Technology Beijing,Beijing 100083,China;Shanxi Generalist Industry and Trade Co.,Ltd.,Linfen 041000,China)

机构地区：[1]北京科技大学绿色低碳钢铁冶金全国重点实验室,北京100083 [2]北京科技大学金属冶炼重大事故防控技术支撑基地,北京100083 [3]山西通才工贸有限公司,山西临汾041000

出　　处：《炼钢》2024年第5期29-37,共9页Steelmaking

基　　金：中央引导地方科技发展资金项目(2023JH6/100100046)。

摘　　要：以120 t五孔氧枪顶底复吹转炉为原型,基于Fluent数值模拟,对多组不同氧枪枪位与底吹气体流量方案进行建模计算,分析了五孔喷头顶吹超音速射流行为,以及不同方案下熔池冲击面积及冲击深度的变化规律。模拟结果与前人实测结果吻合,证明了模拟的准确性。模拟结果表明,由于顶底复吹作用,速度集中在钢液面附近,顶吹和底吹气流周围的区域钢液流速变慢;随着氧枪高度不断升高,冲击深度逐渐减小,冲击面积先增大后减小;当氧枪高度1.8 m时熔池冲击面积最大,单孔底吹流量为60 m^(3)/h,底吹效果最好。A 120 t five-hole oxygen lance top-bottom combined blowing converter was taken as a prototype,based on Fluent numerical simulation,the dynamic modeling and calculation of multiple groups of different oxygen lance positions and bottom-blowing gas flow schemes were carried out.And the supersonic jet behavior of the top blowing of the five-hole nozzle,as well as the variation of impact area and impact depth of the molten pool under different schemes were analyzed.The accuracy of the simulation results was verified by comparing with the previous measured results.The simulation results show that the velocity is concentrated near the molten steel level due to the top-bottom double blowing,and the flow velocity of the molten steel in the area around the top blowing and bottom blowing airflow slows down.As the height of the oxygen lance increases,the impact depth decreases gradually,and the impact area increases first and then decreases.When the height of the oxygen lance is 1.8 m,the impact area of the melt pool is the largest,and the bottom blowing effect is the best when the bottom blowing flow rate of a single hole is 60 m^(3)/h.

关 键 词：五孔氧枪 顶底复吹 数值模拟 冲击面积 冲击深度 

分 类 号：TF729[冶金工程—钢铁冶金]