铁水预处理冶炼一步法409钢种工艺优化探究  

Investigation on the Optimization of One-Step 409 Steel Grade Process of Iron Pretreatment Smelting

作　　者：虎晓东 李俊华 刘斌[1] 陈兴润[1] HU Xiaodong;LI Junhua;LIU Bin;CHEN Xingrun(Gansu Jiu Steel Group Hongxing Iron&Steel Co.Ltd.,Stainless Steel Branch,Jiayuguan 735100,China)

机构地区：[1]甘肃酒钢集团宏兴钢铁股份有限公司不锈钢分公司,甘肃嘉峪关735100

出　　处：《甘肃冶金》2025年第1期66-69,共4页Gansu Metallurgy

摘　　要：介绍了酒钢不锈钢铁水预处理区域冶炼一步法409钢种过程中出现的难题,通过现场跟踪剖析难题存在的根本原因,提出工艺优化方案,督促现场执行,保证一步法409钢种的冶炼。通过优化预处理冶炼工艺,取得了显著成果,具体为:脱磷站的冶炼比例提高37%,一步法409钢种连浇炉数由4炉提升至7炉,降低了一步法409钢种的冶炼成本。脱磷转炉处理铁量平均每炉增加6.4 t,进一步增加一步法409钢种合格板坯量。通过优化脱磷站处理工艺,在AOD的回磷量均控制在0.006%以内,保证了一步法409钢种的成品成分。Introduces the difficulties in the process of smelting one-step 409 steel grade in Jiusteel’s stainless steel iron pretreatment area,analyzes the root causes of the problems through on-site tracking,puts forward process optimization solutions,supervises on-site implementation,and ensures the smelting of one-step 409 steel grade.Through the optimization of pretreatment smelting process,significant results have been achieved,specifically:The smelting ratio of dephosphorization station has been increased by 37%,and the number of consecutive casting furnaces of one-step 409 steel grades has been increased from 4 furnaces to 7 furnaces,which reduces the smelting cost of one-step 409 steel grades.The average amount of iron handled in the dephosphorization converter increased by 6.4 tons per furnace,which further increased the amount of qualified slabs of one-step 409 steel grade.By optimizing the treatment process of dephosphorization station,the amount of phosphorus return in AOD is controlled within 0.006%,which ensures the finished product composition of one-step 409 steel grades.

关 键 词：一步法409钢种 铁水预处理 脱磷站 脱磷转炉 

分 类 号：TF764.1[冶金工程—钢铁冶金]