OPENING METHOD OF PRODUCTS, CONTAINING PRECIOUS METALS Russian patent published in 2009 - IPC C22B11/00 C22B3/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to an area of precious metals metallurgy; in particular to methods of concentrates opening containing platinum-metals (PM) and gold. Method includes pressure leaching of material by solution containing sodium chloride, at temperature 200÷230°C and at partial pressure of oxygen 7-10 ati. Leaching is implemented by solution containing sodium chloride and hydrochloric acid, at consumption of chloride-ion, equal to 1.5÷3.0 g/g of sum of precious metals contained in initial material up to achievement of oxidation-reduction potential of platinum electrode in pulp relative to saturated chlorine-silver electrode equal to 690÷750 mV.

EFFECT: increasing of platinum-metals extraction into solution ensured by opening of thrust minerals, and also in simplification of process of following extraction of rare platinum metals (rhodium, ruthenium and iridium) from received chloride solutions.

2 cl, 1 tbl, 10 ex