中文摘要：

采用热力学软件FactSage中的Equilib和Phase Diagram模块分别对Al2 O3-CaO-MgO三元渣系的熔化性能及添加助熔剂后对渣系熔点的影响进行理论分析,并实验测定渣系的实际熔点.发现渣系熔点随w（ Al2 O3）/w（ CaO）比的升高先降低后升高,w（ MgO）为4%-5%时渣系熔点最低.对于w（ Al2 O3）/w（ MgO）＆gt;3的渣系,w（ CaO）〈30%时渣系熔点随w（ CaO）增加而降低.2〈w（Al2O3）/w（CaO）〈2.5,w（MgO）为15%-18%时,钒铁渣中加2.29% AlCl3、4.86% Fe2O3或4.77% Na2O时均可降低原渣熔化性温度约100℃.

英文摘要：

The melting performance of an Al2 O3-CaO-MgO ternary slag system and the effect of added fluxes on the melting point of the slag system were theoretically analyzed by using Equilib and Phase Diagram modules in thermodynamic software FactSage. The melting temperature of the slag system from production was measured. It is found that the melting point of the slag system decreases first and then increases with increasing w（ Al2 O3 ）/w（ CaO） ratio, and it reaches the lowest value when w（ MgO） is 4% to 5%. At the w （ Al2 O3 ）/w（ MgO） ratio more than 3 and w（ CaO） less than 30%, the melting point decreases with increasing w（ CaO） . When 2〈w （Al2O3）/w（CaO） 〈2.5 and w（MgO） is 15% to 18%, the melting point can decrease about 100℃ with the addition of 2.29%AlCl3 , 4.86% Fe2 O3 or 4.77% Na2 O in the slag system.