Molten slag gasification dephosphorization method during converter splash protection process

Abstract

The invention relates the gasification removing the phosphor method in the course of converter slag, belonging to steelmaking technology field. The main question is following: at the condition of not adding dedicated device and impacting the rhythmic production, removing sulfur-phosphorous harmful substance, realizing recirculation, reducing electrical energy consumption, and reducing pollution. The method comprises the following steps: an adjusting furnace slag and tapping: FeO content being above 12%, separating slag and tapping; b adding carbonaceous and silica reducing agent; c splash slag furnace: adding reducing agent, after 5-10 seconds, falling gun and splashing slag, providing nitrogen intensity being 2.8-4.8Nm3/tíñmin; d ending the splashing slag and finishing the dephosphorization. The method neední»t improve the equipment, saving the slag, energy consumption and added operation, forming the highly effective technology integration, realizing the resource utilization, and reducing the environmental contamination.