METHOD FOR EXTRACTION OF GOLD FROM CLAY ORE AND TECHNOGENIC RAW MATERIAL Russian patent published in 2013 - IPC C22B11/00 B03B5/00 

FIELD: metallurgy.

SUBSTANCE: method involves electrical blasting treatment of raw material with high-voltage electrical discharges. With that, electrical blasting treatment is performed for disintegration of clay aggregates to particles with the size that does not exceed 5-9 mcm. The proposed method is implemented at separate exit from a reactor of concentrate of fraction of coarse particles and discharge to a tray of suspension with fine particles of rock and thin gold with further deposition of thin gold on a mat in the tray and treatment of concentrate of coarse particles to obtain secondary products and extraction of gold. Concentrate of coarse particles is treated with chlorhydric acid, and the obtained calcium and magnesium chlorides are used as anti-icing materials, and gold is leached out of the deposition. Also, water is removed from concentrate of coarse particles, which contains carbonates, 1-2% of sodium chloride is added and baked during 1 hour at 850±50°C, and the obtained calcium and magnesium oxides are cooled down and leached; solution is used to obtain building mortars or raw material for binding materials, and gold is wholly leached from the deposition.

EFFECT: improving extraction of gold with fineness of less than 50 mcm.

3 cl, 2 ex