COMBINED METHOD OF REBELLIOUS LEAD-ZINC ORES PROCESSING Russian patent published in 2016 - IPC C22B19/00 C22B13/00 B03B7/00 C22B3/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydrometallurgical processing of difficult to enrich lead-zinc ores. Method summary consists in direction of ore material to jigging with production of first finished lead concentrate, tailings and jigging middlings, which is after grinding is enriched on concentration tables with extraction of second finished lead concentrate, final tailings and table middlings. Middlings after re-grinding is directed to zinc bioleaching using bacterial complex of autophytic thione microorganisms with conversion of 90-95 % of zinc into productive solution. Bioleaching cake without re-grinding is delivered for recovery of lead by concentration on tables with production of lead middlings and final tailings.

EFFECT: technical result is enabling higher efficiency of difficult to enrich lead-zinc ores processing using simple and environmentally safe technology with increase in zinc and lead extraction degree.

4 cl, 2 ex