25 kA熔盐电解法制备稀土镨钕合金非稀土杂质有效控制的研究

为实现熔盐电解法制备稀土合金工艺大型化、低能耗和高效性，采用25 kA电解电流在氟化物体系中的熔盐电解工艺制备稀土镨钕合金.通过工业实践，探究了电解过程中电解槽结构、电解温度、电流密度、电解质组分、搅炉操作及坩埚材质对电解产品纯度的影响.实验研究确立了25 kA熔盐电解法制备稀土镨钕合金有效控制非稀土杂质含量的工艺参数. 

On the effective control of non-rare earth impurity in the preparation of praseodymium neodymium alloy by 25 kA molten salt electrolysis

In order to achieve the large-scale, low-energy and high efficiency in the preparation of the rare earth alloy by the molten salt electrolysis, 25 kA electrolysis current was adopted in the preparation of praseodymium neodymium alloys in fluoride salt system. Through the industrial practice, the impacts of electrolytic tank structure, electrolytic temperature, and current density, electrolyte composition, stirring furnace operation and crucible material on the quality of electrolytic products were explored. Experiment establishes the technologic parameter for the effective control of non-rare earth impurity in the preparation of praseodymium neodymium alloy by 25 kA molten salt electrolysis.