首钢薄板洁净钢生产技术进展.pdfVIP

首钢薄板洁净钢生产技术进展 朱国森1 李海波 1 刘柏松 1 陈斌 1 杨健 2 亢小敏 2 (1. 首钢技术研究院，北京100043；2. 河北省首钢迁安钢铁责任有限公司，迁安市064404) 摘 要 首钢搬迁后，将产品定位于优质薄板。本文以抗HIC 管线钢和IF 钢为代表，介绍了薄板洁净钢生产技术 研究进展。采用全流程硫含量控制技术，其中 “铁水预处理（扒渣95% 以上）→转炉精料（抑制回硫）→出钢预 精炼→LF 炉快速成高还原渣＋还原性气氛＋强搅拌”工艺冶炼的极低硫钢水中的硫含量平均为5.5ppm。RH 自然 脱碳工艺条件下，12min 真空精炼处理后，可以将钢水碳含量脱至0.001% 。开发了管线钢和汽车用钢夹杂物控制技 术，能够将管线钢条串状夹杂物大于2.0 级的比例控制在2% 以下，汽车板用钢的夹杂物绝大多数为微小(5 微米) 块状Al O 夹杂物。 2 3 关键词 洁净钢；夹杂物；管线钢；汽车板 Progress of Clean Steel Plate Production Technology in Shougang Zhu Guosen1 Li Haibo1 Liu Baisong1 Chen Bin1 Yang Jian2 Kang Xiaomin2 (1. Shougang Research Institute of Technology, Beijing, 100043; 2. Heibei Shougang Qian’an Iron Steel Co.,Ltd., Qian’an, 064404) Abstract After moving of Shougang, the high quality strip is confirmed as the most important production. Take the pipeline steel and automobile steel as representation, the paper expatiates the progress of clean steel production technology. Using the production routine, “De-S of hot metal(slag remove more than 95%)→BOF refining→tapping pre-refining→ strong reductive slag, reductive atmosphere and strong blowing in LF refining”, the average of sulfur content in hot metal is -4%. Using the RH nature decarburization technology, the carbon content could be controlled below 0.001% after 5.5×10 12min. The inclusions controlling technology of pipeline steel and automobile steel was developed. With the technology, the percentage of catenulate inclusions over than 2.0 grade in pipeline steel could be controlled below 2% and the inclusions of Al O in automobile stee