FIELD: cord tyres. SUBSTANCE: device for preparation and treatment of powder includes grinding unit made in form of taper stack of ceramic rings 23 mounted on shaft of drive. On one side stack is closed with casing 24 divided by partition into two chambers; each chamber is supplied with gas by means of pipe unions 26 and 27. Upper chamber of casing 24 is provided with slotted nozzle and lower chamber is provided with system of nozzles. Tyre detachable attachment unit contains shaft rotated by drive and fixed and movable flanges. Device for preparation and treatment of powder includes vortex layer apparatus 10 connected to powder receiver 9. EFFECT: enhanced efficiency. 6 cl, 6 dwg
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