关键词: 铁水罐喷吹脱磷, AOD一步法, 400系不锈钢, 成本

Abstract: The iron ladle injecting dephosphorization process is adopted to supply quality low phosphorus hot metal for a 70t AOD to melt 400 series stainless steel and replace the EAF melting link at stainless steel works, finally the new 1-step stainless steel steelmaking process is realized. The production practice shows that the initial hot metal [P] is 0. 20% , after iron ladle injecting dephosphorization treatment the hot metal [P] is 0.001%~0.010% , the hot metal [C] ≥3. 2% and temperature ≥1320°C , it is wholly to meet the requirement for AOD steelmaking 400 series stainless steels, as compared with original 70t EAF-AOD flowsheet, the production cost reduces greatly.