Method and system for recycling copper zinc and cyanide from copper-bearing gold ore cyanide gold refining

The invention provides a method and system for recycling copper zinc and cyanide from high-copper gold ore cyanide gold refining. Sodium cyanide is adopted to leach copper-bearing gold ore, ultrafiltration and nanofiltration membrane concentration are carried out on a leaching agent, concentrated acid and dissolvable sulfide are sequentially put into concentrated liquor, Cu2S (copper sludge) is produced, the copper sludge can be recycled after water removal, and copper-dissolved sodium cyanide is recycled synchronously; lime milk is added into a liquid supernatant to adjust the pH value, the liquid supernatant obtained after solid-liquid separation is mixed with the nanofiltration membrane leaching agent, and then has a replacement reaction with zinc powder to generate gold, ultrafiltration and nanofiltration membrane concentration are carried out on a barren solution, concentrated acid and soluble sulfide are put into concentrated liquor sequentially, ZnS (zinc sludge) is generated, and recycled after water removal, and zinc-dissolved cyanide is recycled synchronously; and the lime milk is added into the liquid supernatant to adjust the pH value, and the liquid supernatant obtained after solid-liquid separation is mixed with the nanofiltration membrane leaching agent and returns to a leaching pool. The copper zinc and the cyanide are recycled, and therefore the problem that copper-bearing gold ore is high in leaching cost is solved; and meanwhile, the zero discharging of the cyanide liquid in the whole technology is achieved.