PROCESSING OF OXIDIZED ZINC-LEAD BEARING RAW MATERIALS

摘要

At present, a large volume of ores is not processed due to complex mineral composition of the raw materials represented by hard-to-enrich minerals, their close association with barren rock and with each other in the form of fine superficial films of different minerals or peripheral films, and low content of nonferrous metals, which predetermines their significant loss with wastes. Involvement into processing of hard to enrich oxidized zinc-lead bearing ores is possible by combining the process of preliminary sulfidization of oxidized compounds with elemental sulfur or pyrite with subsequent magnetic and flotation enrichment of products of sulfidization. The investigation has provided proof of the possibility of obtaining hydrophobic zinc and lead sulfides as the result of sulfidization. The hydrophoby of pyrite dissociation products decreases in the process of sulfidization with simultaneous increase of magnetic permeability of pyrrhotite formed during pyrite decomposition. This predetermines the technological flow sheet of processing of hard to enrich oxidized finely disseminated lead-zinc bearing ores.