NOUFERROUS METALLURGICAL EQUIPMENT

China has abundant lead-zinc mineral resources, but the zinc hydrometallurgical process produces a large amount of lead-silver slag, which usually contains various valuable metals such as lead, silver, zinc, copper, antimony, and may also contain harmful elements such as arsenic and cadmium. At present, there is a lack of systematic research on the evolution law of the antimony phase in lead-silver slag during the side-blown melting-fuming process. The paper determines the existence form of antimony in lead-silver slag through thermodynamic theory calculations and reveals the evolution law of the antimony phase under different experimental conditions by investigating the effects of factors such as temperature, atmosphere, and time on the evolution of the antimony phase during the side-blown melting and fuming process of lead-silver slag. The optimal process for antimony recovery in the side-blown melting-fuming process of lead-silver slag is determined: the reaction temperature is 1290℃, the carbon ratio is 17.60%, and the holding time is 125min. Under these conditions, the antimony recovery rate can reach 82.54%.The study provides a reference for recovery of antimony from lead silver slag and resource utilization of lead-silver slag.