Study on Technological Process Innovation of Non-Cyanide Leaching

Nowadays, there are many gold leaching processes, and the dominant one is cyanidation, but virulence of cyanidation seriously endangers environment human health. In order to reduce environmental pollution improve recovery rate gold, metallurgical workers put forward a variety new methods, which can be roughly divided into two types: develop pretreatment technology on basis traditional method; The other non-cyanide gold. Based existing Non-Cyanide technology, this paper puts process innovation thiourea method dilute nitric acid pre-oxidation treatment process. system was investigated. According situation silver in raw ore, innovative scheme selected. Compared with overcome danger high pressure, nitrogen oxide gas produced oxidation recycled, basically does not pollute environment.