FIELD: process and geological researches and mineral concentration. SUBSTANCE: method includes preliminary disintegration of initial material particles, heating, mixing etc. by transfer it into vertical gas flow whose velocity drops stepwise as it moves. Gas flow with particles is tangentially supplied. Disintegration is carried out in working chamber with use of impact of gas flow with particles against obstacle with braking in horizontal direction. Withdrawal of the heaviest fraction is effected through holes located in lower part of working chamber. For classification of the finest (lightest) fraction of initial material, use is made of horizontal classifier with gas filter installed at its outlet. For selection of optimal conditions of classification, velocity of flow in classifier chamber is regulated by diaphragming their outlet holes. EFFECT: higher productivity and quality of classification. 5 cl, 1 dwg, 1 tbl, 3 ex
