Copper cyanide removal method of one kind of partial smelting lean liquid Cyanide Process simultaneous silver

The present invention provides a partial removal of copper cyanide simultaneous smelting Process silver cyanide-containing liquid lean, cyanide barren solution into the cathode electrolysis chamber, an anode compartment containing an alkali or salt solution into the electrolytic cell, the cathode and anode of the cell room with a cation exchange membrane, a cation through the membrane into the cathode compartment, to achieve circuit loop Unicom, the cathode compartment electrolytic deposition of copper and CN-, transferred to a higher electrolytic cathode compartment electrodialysis freshwater reservoir tank CN- content reservoir, fresh water in the electrodialysis chamber CN- ions are transferred to and concentrated electrodialysis concentrate chamber, and the like can not be complex ions through the membrane, electrodialysis lower CN- ion concentration of the fresh water storage tank, which returns the electrolysis cathode chamber reservoir, and then electrolytic deposition of metallic copper and CN-. When CN-, fresh water storage tank electrodialysis ion concentration are relatively low, it was taken into concentrated aqueous electrodialysis concentrate water reservoir as electrodialysis. CN- concentration electrodialysis concentrate water storage tank when it is returned to the higher silver leaching step.