METHOD OF LEACHING OF SULPHIDE CONTAINING PRODUCTS Russian patent published in 2008 - IPC C22B3/08 C22B15/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to hydro-metallurgy of non-ferrous metals, particularly to hydro-metallurgical processing of ores, concentrates, tails, slag and sulphide containing metals by vat, heap and underground methods. The method includes contacting of sulphide containing product with water solution of sulphuric acid of concentration more, than 1.8 g/dcm³ at presence of ions of trivalent iron and oxidisation of bivalent iron in the leaching solution. Contacting is performed by means of pumping of the leaching solution through a hydro-dynamic emitter which is fed with gas phase containing ozone of concentration more, than 20 g/m³ and further inflow of the gas-liquid mixture from the hydro-dynamic emitter into a lower part of a contact chamber before a barring surface. The solution is returned to leaching after iron oxidisation.

EFFECT: improved condition of weight exchange of reactions in a system liquid-gas for performing leaching, also higher level of regeneration kinetics of oxidant, sulphides decomposition and extraction of metals into a solution at reduced time of leaching.

7 cl, 2 ex