Study on LF Refining Slag and Slagging Regime of High-Aluminium Steel

摘要：

During secondary refining of molten steel, reaction of steel-slag has great influence on the quality of steel. Taking high aluminium steel (Al>0.8％) for instance, reaction control of 4Al+3(SiO2) = 2(Al2O3)+3Si was discussed by both thermodynamics calculation and industrial experiments. The results show that content of silicon increased sharply when content of SiO2 in slag exceeded 10％. In order to prevent the increment of silicon content and reoxidation for high aluminium steel, reasonable component range of LF refining slag is: ％CaO/％Al2O3=1.6-1.9, ％SiO2 <10. Results of the industrial experiments indicate that the CaO-Al2O3 based refining slag has strong ability of desulfurization and inclusion absorption. Average desulfurization rate is 80％, and T0 reduces above 50％ after refining, with the average sulfur content and T0 about 0.0025％ and 11x10-6,respectively, which can meet the requirements of secondary refining and obtain good castability of steel in continuous casting process.

关键词： high aluminium steel refining slag thermodynamics desulfurization inclusion

作者: ZENGJian-hua ZHANG Min CHEN Yong HE Sheng-ping WANG Qian

作者单位: PanGang Group Research Institute Co, Ltd, Chengdu 611731, Sichuan, China College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

会议类型: 国际会议

会议名称: The 2nd International Symposium on Clean Steel(第二届洁净钢生产技术学术研讨会)

会议地点: 沈阳

会议语种:英文

页码: 201-206

在线出版日期: 2011-08-23（万方平台首次上网日期，不代表论文的发表时间）