冰晶石熔体中Al热还原法制备Al-Sc合金  

PREPARATION OF Al Sc MASTER ALLOY BY ALUMINOTHERMY IN n NaF·AlF 3 MOLTEN SALT

作　　者：路贵民[1] 刘学山[1] 

机构地区：[1]东北大学材料冶金学院

出　　处：《中国有色金属学报》1999年第1期171-174,共4页The Chinese Journal of Nonferrous Metals

基　　金：辽宁省科技基金

摘　　要：在ｎＮａＦ·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２ｈ。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。Sc 2O 3 was melted in n NaF·AlF 3 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 Sc 2O 3 was 1%～2% of the molten salt, the temperature about 1 093 K 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 Sc 2O 3 reduction by Al is not a simply one step reduction, but a complex multiple step reaction.

关 键 词：冰晶石熔体 Al-ScW合金 铝热还原 铝合金 制备 

分 类 号：TF821.051[冶金工程—有色金属冶金]