METHOD FOR FORMATION OF ENRICHED ZONES OF TECHNOGENIC PLACERS BY CYCLIC ACTION OF FILTRATION FLOW Russian patent published in 2020 - IPC E21C41/30 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and is intended for open development of man-made placer deposits of precious metals, primarily used by open separate or underwater method. Method comprises a pebble dump removed from boundaries of a prepared block of sands, a prepared block of sands, designed uniformly in terms of power, a water-outlet ditch in the upper part of the prepared block of sands, an accumulation ditch in the lower part of the prepared sands block, intermediate ditches passed in parallel and perpendicular to the direction of the filtration flow and dividing the prepared sands block into sub-blocks. To intensify migration of gold particles and reduce consumption of process water, cyclic action of filtration flow is carried out on prepared block of sands, which provides migration of high-density particles and formation of enriched layer of sands, flushing is performed on flushing device with developed enrichment circuit. Sands with low content move beyond prepared sands block boundaries.

EFFECT: technical result of the invention consists in process efficiency of preparation for mining of technogenic placer deposits of noble metals due to intensification of process of migration of valuable components, reduction of volumes of washing of sand and reduction of volume of process water.

1 cl, 2 dwg