板坯结晶器电磁制动三维电磁场的数值模拟  

Numerical simulation of 3D electromagnetic field generated by electromagnetic brake in a slab continuous casting mold

作　　者：陆娟[1] 王建军[1] 岳强[1,2] 

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002 [2]湖南中科电气股份有限公司,湖南岳阳414100

出　　处：《连铸》2017年第3期58-63,共6页Continuous Casting

摘　　要：建立了板坯连铸结晶器电磁制动的电磁场的计算模型,分析在恒定电流作用条件下,结晶器内磁感应强度的分布情况,并与实测数据进行了对比。在不同电流作用下,讨论了结晶器内不同截面上磁感应强度的变化情况。结果表明:板坯结晶器电磁制动的磁场在铁芯处最大,并且在上下轭铁间形成了完整、封闭的磁回路,磁感应强度沿着结晶器高度方向呈现出类正弦分布的特征。在制动电流为300~700 A的工艺条件下,在距离结晶器上口约400~450 mm处,磁感应强度接近于0,此处的上部和下部区域内的磁感应强度的方向相反。电流大小的变化只会改变磁感应强度的大小,不会改变其分布,结晶器内磁场主要集中在水平方向,其它方向的分量较小。A three-dimensional model of the electromagnetic field of electromagnetic brake（EMBR） in the mold is presented.The computational model is applied to investigate the effects of magnetic induction intensity in slab mold under constant current conditions.The calculated results of magnetic induction intensity are compared with measured data in a steel plant.The magnetic induction intensity of different cross sections of mould is discussed with the different currents.The magnetic induction intensity in the iron core zone is larger than other parts,the magnetic induction intensity along the height direction of mold is characterized by sinusoidal distribution.Under braking current 300-700 A,the magnetic induction intensity is close to 0 in which the distance to the mold top about 400-450 mm.The magnetic induction intensity direction is opposite in the upper and lower mold.The magnetic induction intensity distribution is similar with various currents,but its value is changeable.The magnetic field in the mold is mainly concentrated in the horizontal direction,and the values of other direction component are smaller.

关 键 词：板坯 连铸结晶器 电磁制动 数值模拟 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]