The Investigation of Phase Transition and Solute Transport for Bloom Continuous Casting with Steel Strip-Feeding Process and Mold Electromagnetic Stirring: A Comparative Study

Based on the finite volume method, a continuum model that coupled enthalpy-porosity approach is developed herein to investigate the fluid flow, phase transition, and macrosegregation in the solidification process for bloom continuous casting. The optimal parameters of the process of feeding strip technology (FST) are obtained, and the effects of different processes of regular continuous casting, mold electromagnetic stirring (M-EMS), and FST on the superheat degree and macrosegregation are compared. The results show that the process of FST can not only greatly reduce the superheat degree of liquid steel and improve the macrosegregation in the bloom center, but also effectively avoid the deterioration of negative segregation defects at the edge of bloom, compared with the processes of regular continuous casting and M-EMS. The best process parameters for the process of FST are as follows: the strip feeding position is 0.12 m far away from the bloom centerline, and the steel strip feeding velocity is 0.20 m s(-1).