方坯连铸结晶器电磁搅拌的数值模拟

来源期刊：钢铁钒钛2010年第4期

论文作者：魏宁 包燕平 吴华杰 王国新 留津津

文章页码：67 - 72

关键词：结晶器； 电磁搅拌； 电磁场； 数值模拟

Key words：mold； electromagnetic stirring； electromagnetic field； numerical simulation

摘    要：根据麦克斯韦电磁理论,利用有限元分析软件ANSYS对240mm×280mm方坯结晶器电磁搅拌的磁场进行数值模拟。分析电流强度、电流频率及结晶器铜管等对搅拌器内磁场分布的影响,得到了磁场特性与电磁搅拌参数的关系。研究结果表明:旋转磁场在结晶器搅拌区域内产生旋转电磁力,使钢液在水平方向形成旋转流动;磁感应强度随电流强度的增大呈线性递增;在低频搅拌条件下频率对电磁搅拌强度的影响较小,而铜管厚度对磁场强度影响较大;模拟结果与实测结果基本吻合。

Abstract: According to Maxwell electromagnetic field theory,the electromagnetic field during the mold electromagnetic stirring for 240mm×280mm bloom casting was simulated by means of ANSYS software.The effects of the current intensity,frequency,and mold copper on magnetic field distribution in the electromagnetic stirrer were analyzed and the relationship between the characteristics of the magnetic field and parameters of electromagnetic stirring was obtained.Results show that the rotary magnetic field can generate rotary electromagnetic force in mold to make molten steel whirling at horizontal section.The magnetic induction density increases linearly with the current intensity increase,the effect of frequency on electromagnetic stirring intensity is slight when the frequency is low,while the thickness of the mold copper has a great impact on the electromagnetic stirring intensity.The simulation results are consistent with the measured ones.