METHOD FOR GROUP LIXIVIATION OF METALS FROM FROZEN ROCKS Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes removal of soil from portion, meant for construction of stack of rocks for lixiviation of metals, forming of anti-filtering base, mounting equipment for draining productive solution, placing lixiviated rocks on prepared base and feeding reagents solutions into stack. In the stack vertical perforated polymer pipes are placed for feeding solution of working reagents and admixtures - concentrated solutions of easily soluble salts of alkali and other metals with low eutectics temperature, upper surface of stack of frozen rocks is made concave. Durable film is placed thereon or a wooden board platform for displacement of generator plant along these, then hot solution of working reagents and admixtures is fed onto stack, below film or platform, and stack is subjected to effect of UHF electromagnetic field by a generator plant, displaced along upper surface of stack by shuttle method for even heating thereof. Concurrently hot solution of working reagents and admixtures is gradually fed under pressure through vertical perforated polymer pipes with increase of amount of melted working zone and displacement of melting front downwards, until reaching stack base and finishing metals lixiviation from stack independently from current season of the year.

EFFECT: higher efficiency.