Effect of EMBr on fluid flow,heat transfer and inclusion removing during CC

A computational fluid flow model was applied to investigate the effects of electromagnetic brake (EMBr) field strength on flow in the mold cavity. The three-dimensional, steady k-ε model of the nozzle and liquid cavity in the mold applied for the magnetic induction method in FLUENT to add the localized-type static EMBr field which was measured at a steel plant. The 3-D fluid flow, heat transfer, and inclusion removing on top free surface in a continuous casting strand with EMBr were investigated. It is found that EMBr effectively slows the speed of molten steel exiting from the nozzle outlet, reduces impingement impact of the jet on the narrow face, and shortens the penetration depth of the lower recirculation zone. It is also helpful to increase the temperature of molten mold flux at the meniscus by 2-5℃. Larger inclusions are easy to be entrapped by mold slag. The inclusion removing fraction increases with an increase in magnetic field strength when the diameters of inclusions exceed 30 μm.