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采用数值模拟与现场实测相结合的方法,对大方坯结晶器电磁搅拌(M-EMS)过程进行了耦合数值模拟,研究了电磁搅拌参数及结晶器铜管厚度对钢液磁场和流场分布的影响。结果表明:当其他参数不变时,磁感应强度、电磁力和流速随着电流的增大而增加。磁感应强度随频率增加而减小,电磁力和流速随频率的增加而增大;且随着频率的增加,最大磁感应强度、电磁力和流速的变化值减小。对于连铸470mm×350mm大方坯,电磁搅拌电流和频率分别为550A和2Hz,结晶器铜板厚度为35mm时,能起到良好的电磁搅拌效果。
The numerical simulations and field measurements were used to simulate the M-EMS process of bloom. The effects of electromagnetic stirring parameters and the thickness of copper tube on the distribution of magnetic field and flow field influences. The results show that the magnetic induction, electromagnetic force and flow rate increase with the increase of current when the other parameters are constant. The magnetic induction intensity decreases with the increase of the frequency. The electromagnetic force and the flow rate increase with the increase of the frequency. With the increase of the frequency, the change of the maximum magnetic induction, the electromagnetic force and the flow rate decreases. For the continuous casting of 470mm × 350mm bloom, electromagnetic stirring current and frequency were 550A and 2Hz, respectively, the mold copper thickness of 35mm, can play a good electromagnetic stirring effect.