CIRCULATION CLASSIFIER Russian patent published in 1994 - IPC

FIELD: gradation analysis. SUBSTANCE: circulation classifier has housing 1 and blade wheel 13 disposed in front of chamber 4. Metering device 25 mounted on branch pipe 19 is communicated with dust-loaded air withdrawal branch pipe 20. Separating chamber 4 has cover 7 movable in axial direction and tangential plates. Such embodiment of classifier allows classification of powders to be effectuated within the range of 5-50 μmm, with part of contaminants in final fraction not exceeding 5% of mass of separated fraction within the whole range of regulation. EFFECT: increased efficiency and high quality of product. 3 dwg