Recycling method for zinc smelting nickel and cobalt slag

Provided is a recycling method for zinc smelting nickel and cobalt slag. The method comprises the steps that nickel and cobalt slag which is produced through three-section reverse antimony and two-section purification production is added to be subjected to one-section purification after being pulpified; copper and cadmium are removed in one-section purification by zinc powder remaining in the nickel and cobalt slag, copper cadmium cobalt slag is formed by the used slag, and then nickel and cobalt slag is not produced any more through purification. The copper cadmium cobalt slag is recycled by cadmium and is leached to separate copper and cadmium, the content of cobalt in the solution is 150-1000 mg/l, and the solution is returned back to a main system after the cobalt is recycled by an organic reagent. According to the recycling method, consumption of purification zinc powder is lowered by fully utilizing zinc powder remaining in the nickel and cobalt slag; a new way is developed for recycling of dangerous solid waste, like the nickel and cobalt slag, produced in wet zinc smelting; the technological process of cadmium recycling production is simplified, production operation is simple, and no precedent reports exist at home and abroad.