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我国现行稀土氟盐电解采用ＬｉＦ作添加剂，电解操作困难，电解成本高。采用廉价的ＮａＦ或其它碱金属氟化物替代或部分替代ＬｉＦ，是稀土电解的一个研究方向。本文测定ＮｄＦ３－ＮａＦ熔体对Ｎｄ２Ｏ３的溶解能力，采用二因子三次正交回归设计研究了ＮｄＦ３－ＮａＦ－ＬｉＦ系的初晶温度，得出该体系初晶温度回归方程的数学模型，分析了ＮａＦ、ＬｉＦ对初晶温度的影响。研究结果表明，从降低熔体初晶温度和提高熔体对Ｎｄ２Ｏ３溶解能力的角度出发，ＮａＦ替代或部分替代ＬｉＦ作为氟盐体系电解金属钕的支持电解质是可行的。
China’s current rare earth fluoride electrolysis using LiF as additive, electrolysis operation difficult, high cost of electrolysis. The use of cheap NaF or other alkali metal fluoride instead of LiF or partial replacement of Li is a research direction of rare earth electrolysis. The solubility of NdF3-NaF melt to Nd2O3 was measured in this paper. The temperature of primary crystallization of NdF3-NaF-LiF system was studied by two-factor cubic orthogonal regression. The mathematical model of the primary temperature regression equation was obtained. The effects of NaF , LiF on the primary crystal temperature. The results show that it is feasible to use NaF instead of LiF as the fluoride electrolyte to electrolyze neodymium supporting electrolyte from the viewpoint of reducing the temperature of the melt and increasing the solubility of the melt.