On the Question of the Complex Processing of Pyrite Cinders

A complex processing variant for pyrite cinders, i.e., the technogenic waste generated in production of sulfuric acid, was proposed. This method provided preliminary chemical activation initial raw materials that comprised thermal treatment with a sodium bicarbonate solution and resulted structural phase changes separate minerals. Due to activation, it possible nonferrous metals into products (in addition partial extraction iron) then concentrate noble residue. The were able be extracted through leaching process reagent based on sulfur compounds subsequent cementation zinc dust. developed method, unlike pyrometallurgical methods, is less energy-consuming more easily implemented than known hydrometallurgical variants, enabling separation iron middlings at first stage. Noble are concentrated residue from it.