FIELD: machine building.
SUBSTANCE: invention relates to technique of electrical mass-classifiers and is provided for continuous separation for fractions of heterogenous powder-like materials, including anthropogenic and natural raw materials. Device for dust extraction from powders includes feeder, installed with clearance to walls in bin of heart cut cylindrical separation chamber with annular partitions and bottom, in which there are implemented central and circumferential openings. Rotor with radial blades in separation chamber, receiver of thin fraction with screen under central opening in bottom of separation chamber. Circumferential openings of separation chamber are implemented by segments and under them there are located pipe branches for withdrawal of coarse grain, in bins of medium and thin fraction there are installed chokes, forming buffer zones. Rotor blades are implemented as F-shaped. Over receiver of thin fraction there are co-axial installed pipes.
EFFECT: refinement of received fractions and efficiency of device, and also effectiveness increase of particles removing of dimension less than 20-30 mcm from powder materials.
5 cl, 1 dwg
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