Abstract: Tundish with the channel type induction heating is a powerful tool to control the superheat degree of molten steel in the mold precisely, so commercial software ANSYS and CFX were applied to analyze the electromagnetic field, velocity field and temperature field of molten steel in order to describe the process of electromagnetic metallurgy in the tundish. Numerical results indicated that, the induced current density in the channel was greater than that in the receiving chamber and the distributing chamber. In the channel, the nonuniform spatial distribution of magnetic field and electromagnetic force causes the molten steel to rotate, and there were two vortices at the cross section of the channel. But in the tundish with the channel type induction heating, the temperature of the molten steel was uniform, and the maximum temperature difference was only 1 K at the cross section of outlet. Without induction heating, the temperature drop between the inlet and the outlets was 7 K. With channel induction heater, the temperature drop could be made up.

Key words: tundish, channel induction heating, electromagnetic force, joule heating, temperature field, flow field