Numerical simulation for EMS induced solidification and inclusion behavior in bloom caster CC mold with bifurcated SEN

Abstract

A three-dimensional mathematical model has been developed to investigate solidification and non-metallic inclusions behavior in bloom caster mold with bifurcated submerged entry nozzle (SEN) under the influence of in-mold electromagnetic stirring (EMS). An enthalpy porosity approach is applied for the solidification analysis and the stochastic tracking model is used to track the motion of non-metallic inclusions. A numerical investigation has been carried out to study the influence of the stirrer current intensity on turbulent flow, shell generation and inclusion transport. The complex interplay of the induced flow with the inertial impinging jet from the SEN has been investigated. The effect of inclusion density and size on the removal rate of non-metallic inclusion has also been analyzed. The results show that in-mold EMS plays a significant role in solidification and inclusion behavior. With current intensity of 375 A, the inclusion removal rate is higher than that of 0 A, 300 A and 450 A stirrer current. This research suggests that the optimal current intensity of EMS gives a better internal quality of the continuous casting (CC) bloom mold.