摘要
通过钢液-夹杂物的热力学基本理论，利用活度相互作用系数和Bjorkvall方法分别计算了CSP流程低碳铝镇静钢中钢和夹杂物的成分，详尽地分析了CaO-Al_2O_3二元系中中间相3CaO·Al_20_3，CaO·Al_2O_3，液态12CaO·7Al_2O_3和CaS夹杂的热力学性质，同时分析了钙处理过程中生成液态铝酸钙夹杂物，避免CaS夹杂析出的条件．模型的结果与工厂试验结果相符合．
The fundamental or common thermodynamical relations between calcium-treated aluminium-killed molten steel and non-metallic inclusions were discussed. The thermodynamic properties of low carbon Al-killed steel and inclusions in the CSP process were calculated using the interaction coefficients of activity and the Bjorkvall method respectively. A detailed analysis of the CaO·Al2O3 binary system established the modification of solid alumina inclusions via the following intermediate phases： 3CaO· Al2O3, CaO· Al2O3, liquid phase 12CaO·7Al2O3 and CaS. The conditions of forming liquid calcium-aluminate inclusions and avoiding the formation of CaS in calciumtreated aluminium-killed molten steel were also discussed using these thermodynamic relations. The results are in good agreement with the plant data.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2005年第6期666-670,共5页
Journal of University of Science and Technology Beijing
