Collision Mechanism for Al2O3 Inclusion Modification after Calcium Treatment for Al-killed Steel

摘要：

　　In present manuscript,Steel samples were taken out during LF refining,and the inclusion information in them was monitored by SEM combined with EDS to understand how Al2O3 inclusions modify during LF refining especially after Ca-treatment for Al-steel.Based on the inclusion observation,collision mechanism of Al2O3 inclusion modification was proposed: CaS and/or CaO based inclusions precipitate after calcium treatment due to higher Ca concentration around calcium bubble,and then CaO based inclusions and l2O3 inclusion collide together and further react with each other,finally to form liquid calcium aluminates.It is supposed about approximating 42% of inclusion modified by the collision.The modified rate of collision mechanism is much faster than the rate of Al2O3 inclusion modification only by chemical reaction.It explains partly why many Al2O3 are well modified in several minutes after Ca-treatment.

关键词： collision modification calcium treatment LF refining

作者: Guo Jing CHENG Zi-jian CHENG Shu-sen

作者单位: State Key Laboratory of Advanced Metallurgy& School of metallurgy and ecology engineering,University State Key Laboratory of Advanced Metallurgy& School of metallurgy and ecology engineering,University

会议类型: 国际会议

会议名称: Asia Steel International conference 2012(第五届亚洲钢铁大会)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2012-09-23（万方平台首次上网日期，不代表论文的发表时间）