中文摘要：

基于熔渣结构离子与分子共存理论和Butler方程,建立了CaF2-CaO-Al2O3-MgOSiO2熔渣表面张力计算模型。本模型利用纯组元的表面张力和摩尔体积以及熔渣中各组元表面相和体相中作用浓度（活度）可以计算出CaF2-CaO-Al2O3-MgO-SiO2熔渣表面张力随熔渣成分、温度的变化规律。将计算得到的表面张力值与文献实测值进行对比,计算结果与文献实测值吻合很好。进一步考察了炉渣成分对表面张力的影响,以期为电渣重熔法精炼铜铬合金过程渣系的控制提供理论参考。

英文摘要：

A thermodynamic model was developed for determining the surface tension of CaF2-CaO-Al2O3-MgO-SiO2 molten slag based on the ion and molecule coexistence theory（ IMCT） of slag structure and Butler ＇s equation. The temperature and composition dependence of the surface tensions in molten CaF2-CaO-Al2O3-MgO-SiO2 slag systems was reproduced by the present model using surface tensions and molar volumes of pure oxides,as well as the mass action concentrations（ activities） at the surface and at the bulk phase of the slag component. The evaluated results for the surface tension showed good agreements with literature data. The effect of slag composition on the surface tension was also investigated,which provided theoretical basis for refining slag control in CuCr alloy electroslag remelting process.