Abstract:In order to eliminate the influence of electrolyte impurities rising in the process of high impurity raw material production, several improved methods to improve the impurity removal ability of the net electrolyte in Guixi smelter are introduced in this article. The improvement of vacuum degree and heat transfer area, the conversion of induction method to segmented circulation method, and the improvement of frozen crystallization process of nickel sulfate are elaborated in details. Significant effects have been achieved in terms of impurity removal capacity of clean liquid process, meeting the existing production scale and improving the descretion tank surface environment.