(东北大学材料冶金学院， *黄金学院， 沈阳 110006)
摘 要: 在n NaF·AlF3-KCl-NaCl熔盐体系中， 用液体Al还原Sc2O3成功制取了Al-Sc中间合金。 最佳工艺条件为：Sc2O3加入量约2%， 温度1093K左右， 反应时间2 h。 合金中Sc含量最高为1%， 金属收得率接近80%。 此工艺操作简单， 反应温度低， 同时避免了金属的烧损， 可大大降低合金生产成本。 实验结果及热力学分析表明， 在冰晶石熔体中， Al还原Sc2O3的过程并非是简单的一步还原过程， 而是由复杂的多步反应(如络合等)构成的。
关键字: 冰晶石熔体 Al热还原 Al-Sc合金
ALUMINOTHERMY IN nNaF·AlF3 MOLTEN SALT
（School of Materials and Metallurgy, *School of Gold, Northeastern University, Shenyang 110006, P. R. China
）
Abstract:Sc2O3 was melted in n NaF·AlF3-KCl-NaCl molten salt and liquid Al was used as the reductant to prepare Al-Sc master alloy. The optimum conditions were:the addition of Sc2O3 was 1%～2% of the molten salt, the temperature about 1093K and the reaction time 2 hours. The Sc content in the alloy reached 1% and the recovery rate of the metal approached 80%. This process has characteristics of simple operation, low reaction temperature,no burnt-loss and low production cost. The experimental results and thermodynamic analysis showed the process of Sc2O3 reduction by Al is not a simply one-step reduction, but a complex multiple step reaction.
Key words: fluoride molten salt aluminothermic reduction Al-Sc alloy
