Key issues for improving of carbonaceous ore beneficiation processes for the extraction of valuable components

Abstract

The results of mineralogic-technological and geochemical research of black shale ores are presented. It has been proved that black shale is a new promising unconventional source of noble and rare metals. Black shale ores of the subjects under study are classified as highly refractory ores and therefore require a special technological approach. To substantiate effective recovery methods, we have studied flotation and extraction options to recover valuable trace elements. Carbonaceous shale of the Kimkan occurrence of the noble Au - Pt mineralization (the Far East) and dictyonema shale of the Leningrad region constituted the main subject of the research. According to the ore composition and structural features of black-shale blocks, the studied subjects are associated with big large-volume gold deposits belonging to black-shale formation: 1) dispersed, finely disseminated condition of noble metal mineralization; 2) presence of carbonaceous matter in ore-bearing rocks; 3) presence of native metals in ore (molybdenum, lead, zink, bizmuth, as well as gold and platinoids). The obtained results predetermine the general guidelines for creating new methods and techniques of processing carbonaceous material for integral development of solid minerals in the mining and oilfield areas of Russia.