FIELD: separation of solid materials by means of liquid at technological treatment of mineral raw material and study of such materials. SUBSTANCE: proposed device includes bed frame, starting material and liquid loading mechanism, inclined working surface, barriers located over edges of working surface which are provided with holes for escape of fractions of starting material and reciprocating mechanism. Device has metal framework with limiting hole on one side where spring- loaded rod transversal motion is located; this rod is connected with drive of reciprocating mechanism; device is also provided with slider fitted with guide secured at angle relative to transversal direction of working surface and fitted with tightening spring. Secured on bed frame near lower unloading part of working surface are limiting barriers of reciprocating motion and limiting barrier connected with spring-loaded longitudinal motion rod is located at upper part of working surface; working surface is rigidly secured on metal framework. Barriers located over edges of working surface are so mounted that they narrowing chutes. EFFECT: increased productivity; simplified construction. 2 cl, 1 dwg
