中文摘要：

利用Fact Sage热力学软件Phase Diagram和Equilib模块分别计算了Ca O含量对Ca O-Al2O3-22%Mg O-1%Si O2-2%Fe O系液相线的影响以及Ca O、调渣剂Ca F2和B2O3单独或复合添加对Al2O3-Mg O-25%Ca O-1%Si O2-2%Fe O系1700℃液相量的影响.通过差热分析测定了现场实验炉渣的熔化开始温度和结束温度,验证了理论计算变化规律.结果发现：电铝热法生产Fe V的炉渣中Ca O质量分数应该控制在25%左右,此时熔化性能较好;调渣剂Ca F2的调渣效果好于B2O3,且Al2O3/Mg O质量比较高时二者不能复合使用;考虑到工业应用效果和环境保护,Ca F2添加量应控制在2%~5%.

英文摘要：

The effect of CaO content on the liquidus of a CaO-A1203 -22% MgO-1% SiO2 -2% FeO system and the influence of CaF2 and B203 contents on the liquid content of the slag at 1700 ℃ were calculated using Phase Diagram and Equilib module in ther- modynamic software FactSage. The starting and ending melting temperatures of the sXag obtained from production were measured by dif- ferential thermal analysis. When the CaO content in the slag is controlled at 25% approximately for FeV alloy production by the elec- trical thermite method, the melting property of the slag is good. The effect of CaF2 on the melting point depression of the slag is better than that of B2O3. Meanwhile, these two fluxes are not suitable to be used together when the mass ratio of A1203/MgO is high in the slag. Considering industrial application and environmental protection, the best addition of CaF2 in the slag is 2% to 5%.