Abstract:In this paper, it is introduced that the application of the technology of crude nickle sulphate production with electrothermal concentration process in the course of copper electrolyte purification is introduced. It puts emphasis on the principle of the electrothermal concentration process, its control method, the determination of the operation indexes, the characteristics and collocation requirements of the equipment structure. The practices in some domes tic smelters, existing problems and suggestions are also introduced herein.