FIELD: introduction of difficult-to-flow additives. SUBSTANCE: device has auxiliary substance hopper, provided with rod-shaped mixer with pins rigidly secured to upper part of mixer and blades formed as vertical metal frames disposed below pins. Outlines of blades are interconnected by springy wire and horizontal screens made from springy wire, which are fixed to hopper wall at both sides of blades in zigzag way. Segment-shaped support with central through openings is disposed in lower part of hopper. Metering mechanism gate is disposed above each opening. Metering mechanism is made in the form of drum with chute on its surface. Device has compressed air supplying mechanism and nozzle for blowing-off substance to be metered away from chute. Drum has electric drive connected with its shaft. EFFECT: increased efficiency, simplified construction and wider operational capabilities. 4 dwg
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