中频炉电磁搅拌是如何形成的？

中频炉中的铁水在磁场中受到力到作用过程为：

1、坩锅中的铁水在感应圈产生的磁场中产生电动力，由于集肤效应，铁水产生的涡流与感应圈中通过的电流方向相反，产生相互排斥作用；

2、铁水受到的排斥力始终指向坩锅的轴线方向，铁水也被推向坩锅的中心；

3、又由于感应圈是短线圈，两头有短部效应，所以在感应圈两头相应电动力变小，电动力分布为上下两头小，中间大。

在这种力作用下，铁水首先从中部向坩锅轴线运动，到中心后分别向上和向下流去，此种现象不断的循环下去，便形成铁水的激烈运动。实际冶炼时可以清除看到铁水在坩锅中心部分向上隆起，上下翻腾的现象，这就是电磁搅拌。

How is the electromagnetic stirring of the induction melting furnace formed?

The molten iron in the induction melting furnace is forced to act in the magnetic field as follows:

1. The molten iron in the crucible generates electromotive force in the magnetic field generated by the induction coil. Due to the skin effect, the eddy current generated by the molten iron and the current passing through the induction coil are in the opposite direction, resulting in mutual repulsion;

2. The repulsive force received by the molten iron always points to the axis of the crucible, and the molten iron is also pushed to the center of the crucible;

3. Since the induction coil is a short coil, there is a short part effect at both ends, so the corresponding electric power at the two ends of the induction coil becomes smaller, and the electric power distribution is small at the upper and lower ends and large in the middle.

Under the action of this force, the molten iron first moves from the center to the axis of the crucible, and then flows upward and downward respectively after reaching the center. This phenomenon continues to circulate, forming a violent movement of the molten iron. In actual smelting, the phenomenon that the molten iron swells up and up and down in the center of the crucible can be cleared. This is electromagnetic stirring.