FIELD: manufacture of building materials. SUBSTANCE: material under investigation is fed into working chamber, is heated up to temperature more than 100 C, is dried at that temperature. Then the material is mixed simultaneously with introducing gas flow into chamber and with creating electric discharge with the help of electrodes being in working chamber. The material sizing is carried out in cycles. In each subsequent cycle the velocity of gas flow is increased. EFFECT: enhanced quality of material classification. 1 dwg
