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 metals lixiviation, forming of anti-filtering base, mounting equipment for draining productive solution, placing lixiviated rocks on prepared base and feeding working reagents solutions into stack. Stack of rocks meant for lixiviation of metals is formed in cold season of the year from frozen fractured rocks, with added layers of easily-soluble metal salts with high energy of forming of their water solutions and low eutectics temperature. Perforated pipes are placed in the stack for feeding working reagents solution, above the stack heat-protective device is constructed for preventing melting stack from freezing. Surface of stack is made concave and then hot solution of working reagents is sprayed onto stack or injected therein, which dissolves slats in the stack and as a result of produced heat, heat, brought by working reagents from outside and low freezing temperature of formed solution stack of frozen rocks is melted and metals lixiviation process is started and finished therein.

EFFECT: higher efficiency.