METHOD FOR EXTRACTION OF FREE GOLD FROM ALLUVIAL AND ORES AND DEVICE FOR THIS METHOD IMPLEMENTATION (VERSIONS) Russian patent published in 2013 - IPC C22B11/00 C22B3/24 C22B3/02 B03B5/30 

FIELD: metallurgy.

SUBSTANCE: gold-bearing pulp from alluvial and ores is prepared, absorbent based on liquid hydrocarbons is used. Density of this absorbent is lower than density of the pulp. Then pulp contacts absorbent, during this process free gold transfers from pulp to absorbent. Free gold is extracted from absorbent by absorbent filtration in filter press. Volumetric contact of pulp with absorbent is performed due to pulp filtration in downward direction through at least one layer of absorbent, at that used absorbent has oxidation-reduction potential (Eh) not less than +1400 mV and is characterised by adhesion value to free gold not less than 40 Pa. Process efficiency of production plant for filtration-absorption extraction of gold from gold-bearing pulp is 800-1000 m³/day.

EFFECT: improving extraction efficiency of free gold of small, thin, pulverescent and disperse classes from alluvial and ores.

16 cl, 1 dwg, 5 tbl, 5 ex