Optimizing Design of Vortex Suppression Utilizing Static Electromagnetic Field during Steel Teeming from Ladle

Vortex slag entrapment during ladle teeming process causes liquid steel pollution and nozzle clogging, etc. Tangential velocity of molten steel is directly related to the vortex. In this paper, the tangential velocity was reduced by the electromagnetic force generated by the interaction between a static electromagnetic field and molten steel. Through the multi-physical field simulation, influences of the electromagnetic parameter, coil structure, coil position and ladle structure on the vortex were investigated. Results demonstrate that magnetic induction intensity is proportional to the coil ampere-turns, thereby affecting the vortex suppression. The action region of the static electromagnetic field expands when the coil diameter increases from 180 mm to 360 mm, it is beneficial to reduce the vortex critical height by 37.9%. The reduction of the distance between the coil and molten steel also promotes the vortex suppression. The coil misalignment is beneficial to fully utilize the electromagnetic field, the critical height is reduced by 15%. The tangential velocity is changed when the nozzle diameter and eccentricity are optimized, and the vortex suppression will be amplified by using the electromagnetic field. This work provides the theoretical guidance for the optimizing design of the vortex suppression utilizing the static electromagnetic field. This article is protected by copyright. All rights reserved.