FIELD: metallurgy.
SUBSTANCE: procedure consists in storage of massif of rejects, in supply of leaching solution, in collection of production solution and in extraction of useful components out of it. Prior to supply of leaching solution massif of rejects is dried. Hygroscopic material is laid on surface of massif. Leaching solution is supplied into massif to complete saturation. Production solution accumulated in the hygroscopic layer is removed by pressing, evaporation, wave vibrations or by gravity flow. Also leaching solution is supplied in proportion to rate of removal of production solution from hygroscopic material.
EFFECT: reduced labour intensiveness and increased output of useful elements extraction.
5 cl, 1 dwg
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