3D Coupled Model on Dynamic Initial Solidification and Slag Infiltration at the Corner of Slab Continuous Casting Mold

Abstract

Herein, a 3D mathematical model is established to elucidate the dynamic initial solidification and slag infiltration at the corner of the mold. The three‐phase fluid flow, heat transfer, the solidification of the steel, and the mold oscillation are considered. The slag movement and the variation of the meniscus solidification are revealed with the mold oscillation, and explained by the variation of the pressure in the gap and the heat flux at the meniscus. The direction of the liquid slag near the corner flowing into and out of the gap changes during the positive and negative strip stage, respectively. The liquid slag near the corner and that far from the corner can be supplied reciprocally along the gap. The speed of the liquid slag film at the corner has positive correlation with the pressure difference at the mouth of the gap and in the gap. The meniscus solidification near the corner varies with the mold oscillation, and is the smallest approximately 1.0 mm at the start of the negative strip stage. Therefore, the meniscus solidification and slag lubrication can be improved through the optimization of the mold oscillation.