电极插入深度对电渣重熔过程影响的数模研究

以电渣重熔系统电极、渣池和钢锭为研究对象,利用有限元分析软件求得稳定电渣重熔过程电磁场和焦耳热场分布,并通过计算流体动力学软件模拟分析了耦合电磁场和焦耳热场的三维电渣重熔过程在不同电极插入深度下温度场、速度场和电磁场的变化.结果表明:当电极插入深度为15 mm时,渣池两侧的逆时针方向旋转涡流之间出现一个顺时针方向旋转涡流,其尺寸随着电极插入深度的增加而增加;电极插入深度每增加15 mm,湍流动能的降幅约为21%,而最大温度值的降幅约为1%.

Numerical Simulation on Effects of Electrode Inserting Depth on Electroslag Remelting Processes

The distribution of magnetic field and joule heating in the electroslag remelting process， including electrode， slag and ingot， were obtained by finite element software. The changes in the temperature profiles， the velocity fields and the magnetic fields with different inserting depth of electrode were analyzed in the electroslag remelting process coupling the magnetic field and joule heating. The results show that when the inserting depth is 15mm， an intermediate region appears between the anti-clockwise circulation eddies in the bulk of the slag which is controlled by a clockwise circulation eddy. Its size increases with the increase of electrode inserting depth. The turbulent kinetic energy drops by 21% and the maximum temperature decreases about 1% for each additional 15mm of the inserting depth.