Based on the established mathematical and physical model for calculating the three-dimensional electromagnetic field in soft-contact continuous casting mold

effects of exciting current density

varied at 2.2×106 A/m2 to 1.32×107 A/m2

on the distribution of magnetic induction intensity and electromagnetic forces in soft-contact mold were simulated. The results show that the magnetic induction intensity and electromagnetic force in the surface layer of molten steel or billet can be effectively increased in the beginning solidification region

however

the heterogeneities of magnetic induction intensity and electromagnetic forces along the circumference direction are enhanced with the increase of exciting current intensity. The values of magnetic induction intensity and electromagnetic forces at slits are evidently higher than that at the segment center. Besides

change gradient of electromagnetic forces along height direction of mold is increased with increasing in exciting current density

resulting in the deterioration of homogeneity. So the exciting current density should be controlled at a accepted range to ensure the quality of billet.