A New Method to Reduce the Shielding Effect of Copper Mold in the Bloom Continuous Casting with M-EMS

To reduce the shielding effect, insulating layers are placed in a copper mold. A numerical model is built to simulate the electromagnetic field, fluid flow, and solidification behavior in bloom continuous casting with M-EMS. The results show that the magnetic flux density in the strand decreases obviously with the current frequency increase, and the tangential electromagnetic force reaches the maximum as the current frequency is set at 2 or 3 Hz. With the dual transverse insulating layers placed near the stirrer center, the shielding effect of copper mold is obviously reduced and the electromagnetic force increases clearly, which promotes the strand center temperature decreasing. As the combination of vertical and dual transverse insulating layers are placed, 98.1% of the magnetic field can penetrate through the copper mold, which is very close to that without considering the shielding effect of copper mold.