Suppression and Control of Vortex Formation Caused by Boundary Disturbance during Ladle Teeming Process

Abstract

During the final stage of ladle teeming, vortex formation leads to air entrainment and slag entrapment, resulting in steel degradation. To effectively control this formation during ladle pouring, reverse rotation is introduced in the vortex to generate boundary disturbances. Further, water modeling is performed to investigate the influences of container diameter, nozzle diameter, initial disturbance, and reverse rotation on vortex formation. While larger‐diameter containers facilitate easier vortex formation, smaller‐diameter nozzles trigger faster vortex formation. Vortex penetration height and maintenance time increase with increasing initial tangential velocity. In addition, boundary disturbances resulting from reverse rotation effectively suppress vortex formation. Overall, to eliminate vortices, the applied disturbances must counteract the gradually accumulating angular momentum of the vortices.