FIELD: mining industry.
SUBSTANCE: method includes removal of melted soil from portion meant for construction of stack, placement of anti-filter base, mounting of equipment for draining productive solution and placement onto prepared base of stack of lixiviated rock solids. Stack is formed from frozen clotted or frozen rock solids broken by freeze fractures in open capacitance made of non-combustive materials with possibly sealed gates at ends for comfortable use of stack and its removal in case of multiple use, combustive liquid is injected into lower portion of stack and is ignited. After burning for start of lixiviation process reagents solution is injected with additions in form of easily soluble metal salts with low eutectics temperature, which do not engage in reactions with working reagents and possible intermediate products of chemical reactions, with concentration close to saturation for lowering temperature of solution freezing down to eutectic for given salt, and combustible liquid, which is forced upward due to lower specific weight, it is ignited, and then into lower portion of stack concurrently fed are combustible liquid and solution of reagents with additions, so that burning front moves upward up to its exit to upper limit of stack and as a result lixiviation of metals is provided for in parallel with stack melting.
EFFECT: possible lixiviation of metals from frozen clotted or broken by freeze fractures rock solids at any time of year, simplicity and effectiveness of method.
