Process and apparatus for separating solid granular...

B - Operations – Transporting – 07 – B

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B07B 9/00 (2006.01) B07B 4/08 (2006.01)

Patent

CA 1059951

ABSTRACT OF THE DISCLOSURE: In a process of separating solid granular metallui- gical products and their precursors by providing a plurality of linearly vibrating inclined screens spatially arranged one over the other, in a housing, each screen having an inclination greater than that of the screen above and wherein the width of the mesh openings in each screen is less than that of the screen above and the width of the mesh openings of each screen is 1.5 to 15 times larger than the desired parting size, and feeding the solids to be separated onto the uppermost screen at the upper end of said housing, comprising flowing a gaseous fluid through at least part of the working space required for screening in a direction approximately transverse to the direction in which the solids pass through the screens at a rate and in an amount to effect entrain- ment of those solids having a lower specific gravity between successive adjacent screens by the gaseous fluid flowing through the working space and to effect the resulting gaseous fluid laden with the solids of lower specific gravity to flow into a separating chamber, and separating the solids of lower specific gravity from the flowing gaseous fluid in the separating chamber. And, an apparatus to carry out the above process.

272391

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