METHOD OF HEAP BACTERIAL LEACHING OF SULPHIDE CONTAINING PRODUCTS Russian patent published in 2008 - IPC C22B3/18 C22B15/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to hydro-metallurgical production and can be implemented at heap leaching of suplhide products, containing various non-ferrous and precious metals. The method includes leaching of sulphide containing ore stacked in a heap on a water impregnable base with water solution, containing sulphuric acid of concentration 2-10 g/l, trivalent iron ions 1-20 g/l and iron oxidising bacteria with microelements. Regeneration of bivalent iron is performed in a liquid phase of leaching in a separate assembly; it is performed by means of iron oxidising bacteria with aeration with ozone-air mixture at concentration of ozone 0.5-5 mg/l and consumption 0.1-1 l per litre of a treated liquid phase in a minute and at pH 1.5-2.2.

EFFECT: increased degree of metal extraction out of sulphide containing product and increased rate of leaching.

4 cl, 2 ex