METHOD FOR PREPARING A BACTERIAL OXIDATION PRODUCT FOR HYDROMETALLURGICAL PROCESSING Russian patent published in 2023 - IPC B01D21/26 C22B11/00 

FIELD: non-ferrous metallurgy.

SUBSTANCE: preparation of sulfide gold-bearing concentrates for further hydrometallurgical processing used to recover gold from refractory sulfide gold-arsenic ores. Variants of the process include hydrocyclone to produce overflows and sands. The sands are further oxidized, combined with the drain and sent for centrifugation in the presence of a flocculant. The resulting cake and centrate are sent for neutralization. Centrate after neutralization, together with flotation tailings, is stored in a tailing dump. The cake after neutralization is directed to hydrocyclone to obtain overflow and sands. The sands are sent for grinding and returned to hydrocyclone, and the drain - for further processing. In options of the method, a flocculant is used on the entire volume of the biopulp during the centrifugation operation, as well as on a part of the pulp with the circulation of the resulting centrifuge.

EFFECT: more complete and economical extraction of gold from various gold-bearing ores and expansion of the scope of such means.

3 cl, 2 dwg, 2 ex