Patent ID: 6491241
Filing Date: 2002-12-10
Classification: B02C

Abstract:
A powder handling device comprising:a cyclone comprising (i) one or more surfaces at the outer circumference of the cyclone along which fluidized powder flows in a circular pattern during operation of the cyclone, (ii), intersecting one of the surfaces, an inlet, (iii), intersecting one of the surfaces, a recycle outlet, and (iv), substantially orthogonal to the circular pattern, a product outlet; and a source conduit of fluidized powder connected to the inlet comprising (i) a powder conduit connecting from the recycle outlet, and (ii), connected to the powder conduit, a venturi (a) with an aspirator inlet adapted to accept a gas feed and (b) effective to create turbulence in the fluidized powder, wherein the recycle outlet is not connected to the aspirator inlet.