FIELD: investigation and concentration of mineral materials. SUBSTANCE: method includes introduction into working chamber of initial material and gas flow, accommodation in working chamber of rotor and stator plates for disintegration and classification of material in which heaviest particles of initial material falls down between internal surface of casing and stator plates into pocket of heavy fraction accumulation. Light particles are entrapped through chamber outlet hole to gas conduit producing vertical flow whose velocity reduces stepwise due to successive stepwise increase of diameters of classifier chambers installed above working chamber. Classified material is withdrawn from chambers. EFFECT: higher quality of classification of powder material particles. 12 cl, 1 dwg, 3 ex
