METHOD FOR ADDITIONAL EXTRACTION OF GOLD FROM GALE-LIXIVIATION DUMPS AND TAILINGS FOR WASHING SANDS OF PLACER DEPOSITS Russian patent published in 2021 - IPC B03C1/08 B03B5/70 

FIELD: enrichment of minerals.

SUBSTANCE: disclosed invention relates to enrichment of minerals, in particular placer gold deposits, and can be used for processing of man-made formations—gale-lixiviation dumps and tailings for washing sand of gold-bearing placers. Method for additional extraction of gold from gale-effluent dumps and tails of washing sands of placer deposits includes sedimentation of mineral particles due to creation in general linear-wave flow of water-mineral mixture, local vortex flows formed by vertically oriented magnetic swirlers, providing formation on the movement path of water-mineral mixture, along the entire height of its flow of cylinder-shaped accumulations of fine particles of magnetic minerals, delaying "thin" and platelet particles of gold and accompanying valuable minerals, after which, on the way of movement of water-mineral mixture, along the entire height of its flow, creating a secondary zone of local vortex flows by electrohydrocyclones, on which, when voltage is applied, small gas bubbles of electrolytic hydrogen are separated, retaining "thin" gold particles and providing flotation movement to upper layers of main flow of mixture of gold plate-like particles, to enhance adhesion of the latter to the surface of bubbles of electrolytic gases, a solution containing a floatation agent and a collector is dosed. In the zone of electrolytic treatment secondary local vortex flows of reduced diameter are formed, providing removal of light particles of vein minerals and deposition of placer minerals and fine gold particles in it, intensification of deposition or flotation of flaked and plate gold particles. Flotation agent is fed into the head of the process. Deposited "thin" particles of the valuable component are periodically extracted with a cleanup. Floated plate particles are directed in separated flow top layer into catcher.

EFFECT: technical result is higher efficiency of dispersed polymineral material enrichment.

1 cl, 1 ex, 2 dwg