FIELD: concentration of minerals; extraction of gold fines in handling technological placers. SUBSTANCE: concentrator has bath widening upward, chambers-accumulators of heavy concentrate, transporting spirals equipped with agitating pins above heavy concentrate accumulating chamber, drive, loading device, drain sills set by level and unloading device. Bath is provided with inclined settling plates mounted above transporting spiral. EFFECT: increased degree of extraction of gold fines; improved ecological situation in performing mining jobs. 3 dwg
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