大型板坯电渣重熔过程的脱氧热力学模型

以12Cr2Mo1R钢所用渣系为研究对象，选择Al作为脱氧剂，建立脱氧热力学模型.在不同的Al添加量条件下对12Cr2Mo1R钢熔渣-金属界面处各物质的平衡质量分数进行计算，分析各物质平衡质量分数随Al添加量的变化规律，为在给定Al添加量条件下进行终点成分预报，以及根据钢种成分要求选择Al添加量范围提供理论依据.结果表明，随Al添加量的增加，Si，Mn，Al，Al2O3的平衡质量分数呈上升趋势；SiO2，MnO，FeO的平衡质量分数呈下降趋势.若仅从Si，Mn，Al成分合格的角度考虑，Al的添加量占吨钢的百分比不能超过02%.

Thermodynamics Model of Deoxidation in ESR Process for Large Slab Ingots

A thermodynamics model for deoxidation in the slag system of 12Cr2Mo1R steel with Al as a deoxidizer was developed. The equilibrium mass fraction of 12Cr2Mo1R steel with different Al additions was calculated at the interface of slag metal substance. The dependence of the equilibrium mass fraction on the Al additions was investigated， which provided a theoretical basis to the end composition prediction with the given amount of Al and to the limits on the amount of Al according to the composition required by certain steels. The results show that， the mass fractions of Si， Mn， Al and Al2O3 increase with the increasing Al content， while the mass fractions of SiO2， MnO and FeO tend to decrease. Considering the limitation of Si， Mn and Al mass fraction， the amount of Al added in one ton steel should not exceed 02%.