Control of Reverse Emulsification and Mixing Time in a Bottom Blown Bath Covered with Top Slag

Abstract

Water model experiments were carried out to seek a possibility to control reverse emulsification, i.e., entrapment of slag droplets and mixing time in the molten metal layer covered with top slag. The bath was agitated by centric bottom gas injection. A circular plate was immersed in the bath to change the flow pattern. When the diameter of the plate was larger than the width of the bubble dispersion region formed above the centric nozzle, the recirculating flow was significantly strengthened. As a result, the reverse emulsification and mixing time were systematically controlled by moving the plate in the vertical direction.