FIELD: gravitational extraction of useful components at hydromechanized mining of placers and weathering crust. SUBSTANCE: proposed concentrator has housing mounted for performing vibrations, cone-shaped screen lying on concentric partitions forming circular compartments equipped with pipe lines fitted with cocks for control of pressure of medium adequate to thickness of suspension of material above compartments, fixed comb for smooth loosening of entire volume of suspension. Charging unit is provided with branch pipe for delivery of starting material inside cone- shaped screen below level of suspension of material. Branch pipe for discharge of heavy fraction is provided with unit for delivery of counter- flow medium at adjustable head in form of additional branch pipe fitted with ball cock and detachable transparent plastic container with ball cock in front of it for outlet of preset volume of heavy fraction. EFFECT: increased extraction of valuable minerals due to avoidance of interaction of separable fractions. 1 dwg
