Method for improving purification efficiency of electrolyte

The invention discloses a method for improving the purification efficiency of an electrolyte, and belongs to the technical field of copper electrolytic refining. The method comprises five procedures: a, a copper removal procedure, b, a copper sulfate procedure, c, a primary arsenic removal procedure, d, a nickel sulfate procedure and e, a secondary arsenic removal procedure. According to the method, the impurity removal efficiency of the electrolyte is improved, the arsenic content in the arsenic slag is increased, the purification and impurity removal energy consumption and the impurity removal cost are reduced, and a nickel sulfate product can be produced when the nickel concentration of the electrolyte is low. According to the method, in the purification process of the electrolytic waste liquid, only A-grade copper is produced, a black copper plate is not produced, meanwhile, the arsenic concentration of the arsenic removal replenishing liquid can be remarkably improved through the evaporated and concentra