工程科学学报2017，Vol.39Issue(5)：702-709,8.DOI:10.13374/j.issn2095-9389.2017.05.008
Al--Ca复合合金钢水脱氧机理的研究
Study on steel deoxidation with Al-Ca compound alloy
王晓英 1仇圣桃 2邹宗树 2干勇1
作者信息
- 1. 东北大学冶金学院, 沈阳110819
- 2. 钢铁研究总院连铸技术国家工程研究中心, 北京100081
- 折叠
摘要
Abstract
The thermodynamic diagram of calcium-aluminum-oxygen ternary system was determined through thermodynamic equi-librium calculation of liquid steel deoxidation. Based on this thermodynamic diagram and assuming 100% yield of Ca addition, the evolution mechanisms of inclusions with three different deoxidation schemes were predicted, including M kg addition of mCa/mAl =5 al-loy, M kg addition of mCa/mAl =0. 2 alloy and 0. 2M kg addition of mCa/mAl =0. 2 alloy. The calculated results show that the evolution history of inclusion is affected by both the addition quantity and Ca/Al mass ratio of Al-Ca deoxidizer. The optimal deoxidation scheme is that the Ca/Al mass ratio is 5 and addition quantity is M kg, which makes the initial [ Ca] content of 0. 01% and initial [ Al] content of 0. 002% in liquid steel. Under such a condition, the evolution history of inclusions is 12CaO·7Al2O3(l)/CaO·Al2O3(l)→CaO(s)→12CaO·7Al2O3(l)/CaO·Al2O3(l)→CaO(s)→12CaO·7Al2O3(l)/CaO·Al2O3(l), and the desirable alternative forma-tions of solid and liquid inclusions can be realized during LF refining, which can greatly enhance the effective collision and promote the floating up of inclusions. The results can be applied in industry for steel deoxidizer selection and deoxidation operation.关键词
铝钙钢水脱氧合金/夹杂物/演变机理/热力学计算/铝酸钙Key words
aluminum-calcium steel deoxidizer/inclusions/evolution mechanism/thermodynamic calculation/calcium alumi-nate分类
矿业与冶金引用本文复制引用
王晓英,仇圣桃,邹宗树,干勇..Al--Ca复合合金钢水脱氧机理的研究[J].工程科学学报,2017,39(5):702-709,8.
