Quantitative analysis of molten metal flow in rotating stirring electromagnetic field

摘要

Electromagnetic stirring is an effective technique of improving the solidification structure and mechanical properties during continuous casting, because there is a notably effect of the flow on the density,segregation and inclusion of molten metal. In order to better understand the molten metal flow, the analysis software-ANSYS is used to simulate the 3D couple field of electromagnetic field and flow field for the self-developed rotating electromagnetic stirring equipment. The pure aluminum,tin and lead are used for both of experiment and simulation. The following results are obtained: 1) The magnetic induction intensity of liquid metal surface (BO) is in inversely proportional to the current frequency and is proportional to the input volt/current. 2) The maximum electromagnetic force is directly proportional to the square of magnetic induction intensity (BO) and the nth-power of current frequency decreases with the increase of the electric resistance of molten metal and changes from 1/2 to 3/2. The n is 1/2 for aluminum metal and 1 for tin metal and lead metal. 3) The rotating velocity of molten metal is directly proportional to the magnetic induction intensity(BO) and is in inversely proportional to the square root of the density of molten metal. The viscosity of molten metal has little effect on the rotating velocity. The above results are consistent with experiment results, which prove the credibility of simulate results.