FIELD: separation of grain mixtures. SUBSTANCE: apparatus has closed box with one or two table for separating into layers. Tables are mounted in inclined position for oscillating together with box. Tables are blown by air flow. Part of box adjacent to table lower end has air-duct for recycling return air flow. Air-duct is extending along box height and has inlet part communicated with pressure part of fan and outlet part communicated with cavity under table. Sucking part of fan is communicated through cleaner with branch pipe for discharging air from box. EFFECT: increased efficiency of cleaning grain material. 4 cl, 5 dwg
