Extraction of Noble Metals from Pyrite Cinders

When obtaining sulfuric acid from pyrite concentrates, a significant amount of waste is generated in the form cinders that require disposal. The methods used processing this raw material are, as rule, pyrometallurgical processes chlorination and chloride sublimation, disadvantages which include increased energy consumption lack complexity extraction valuable components. Hydrometallurgical are less demand due to their multi-stage nature execution. method chemical activation developed at JSC “Institute Metallurgy Ore Beneficiation” makes it possible isolate iron non-ferrous metals into separate, middling products concentrate noble cake first stage. Physical studies found its basis comprises compounds. silver associated with pyrite, while gold hematite; also find AuCl3. content 1.5 g/t, 17.7 g/t. Based on physical data literature, various versions hydrochlorination proposed open cake.