Abstract: The smelting of stainless steel has been developed by using powder injection process for desiliconization,  dephosphorization and desulphurization of hot metal with pretreatment device,a 30 t EBT UHP EAF for smelting iron alloy and partial scrap, a 75 t K-OBM-S top and bottom combincd blown converter and VOD refining at Taiyuan Steel. Its capacity has been up to 50× 10°t/a.The selection of processes,definition of major equipment,development of key technologies and application effect including hot metal dephosphorization,K-OBM-S smelting stainless steel model,free argon smeling  various stainless steels and high quality extra-pure ferrite stainless steel smelting are presented emphatically.

Key words: Charging,Stainless Steel,Pretreatment of Hot Metal,K-OBM-S Blown Smelting,VOD Refining

摘要： 太钢开发了通过预处理装置采用粉剂喷吹法对铁水进行脱硅、脱磷和脱硫;以30 t EBT UHPEAF熔化铁合金和部分废钢、75 t K-OBM-S顶底复吹转炉和VOD精炼的冶炼不锈钢工艺,生产能力已达50万t/a。重点介绍了工艺流程的选择、主体设备的确定和铁水脱磷、K-OBM-S冶炼不锈钢模型、无氩冶炼多种不锈钢和高质量超纯铁素体不锈钢冶炼等关键工艺技术的开发和效果。

关键词: 炉料, 不锈钢, 铁水预处理, K-OBM-S 吹炼, VOD精炼