METHOD AND DEVICE FOR CYANIC LEACHING OF NOBLE METALS FROM ORES, CONCENTRATES, TECHNOGENIC AND MINERAL WASTES Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: it can also be used in processing of non-ferrous, rare and other metals. Method implies charging of ore, concentrates or wastes, and leaching solution into chamber, pouring of leaching solution from chamber into vessel, pumping slurry from one chamber to another with circulation up to preset extraction, mixing of solid and liquid phases of slurry by delivering flow of leaching solution into bottom part of chamber, pouring solution from chamber into collecting vessel, aeration of leaching solution. Pumping of slurry from chambers is effected by ejection and solution of air or oxygen in pressure stream of hydroelevator operating after withdrawing of slurry, in solution pumping mode. Device has two or more chambers hydraulically interconnected by circulation pipelines. Chambers have pipe unions for charging and discharge of material. Also provided are pipelines for discharge and delivery of solutions. One ends of circulation pipelines for interconnection of chambers are located inside chambers in their upper part, and other ends are located in lower part of chambers. Pipe unions of solution delivery pipelines are provided with head-pieces of hydroelevators. EFFECT: high efficiency. 3 cl, 1 dwg