Effects of Eccentric Mold Electromagnetic Stirring on Continuous Casting Large Steel Round Blooms

In this paper, a coupled 3D mathematical model is established to study the electromagnetic, flow and temperature fields of round blooms with different degrees of eccentric mold electromagnetic stirring (M-EMS). The results show that under the action of severely eccentric M-EMS, the magnetic flux density and time-averaged electromagnetic force near the external arc side of a Φ380 mm round bloom are greater than those near the inner arc side; the inertial impingement jet from the nozzle is deflected toward the external arc sides, and the temperature of molten steel on the external arc side is higher. As the degree of M-EMS eccentricity decreases, the differences in the electromagnetic, flow and temperature fields between the inner and external arc sides of the round blooms gradually decrease. The molten steel temperature on the inner arc side increases significantly after moving the nozzle position to the inner arc side of the Φ380 mm round bloom, so this method is not suitable to eliminate the effects of M-EMS eccentricity on Φ380 mm round blooms.