According to Maxwell electromagnetic field theory a mathematical model for simulating the mold electromagnetic rotary stirring for 360 mm x 450 mm bloom concasting has been established to analyze the distribution characteristics of magnetic flux density and electromagnetic stirring force
and the effect of current strength (300-700 A) and stirring frequency (2.0-3.0 Hz) on flux density and stirring force. Results show that the rotary magnetic field can generate the electromagnetic force in mold to make molten steel whirling at horizontal section ; the relation between magnetic flux intensity of induction and stirring current is linearity
and with lower stirring frequency the effect of frequency on electromagnetic stirring intensity is slight.