Method and apparatus for sorting particulate material

Details Method and apparatus for sorting particulate material Method and apparatus for sorting particulate material

1982-08-23

1985-04-16

Lutter, Frank W.

Classifying, separating, and assorting solids

Fluid suspension

Gaseous

209138, 209144, B07B 7083

Patent

active

045114625

ABSTRACT:
A method for separating particulate material into coarse and fine fractions is disclosed by suspending the material in a conveying gas flow having a radially symmetrical flow pattern, radially surrounding the gas suspension with a band of clean gas containing substantially no particulate and directing the concentric gas flow past a vaned rotating rotor having an axis of rotation axially aligned with the concentric axis of the gases. The rotor vanes fling the coarse fraction in a radially outwardly direction while the remaining fine fraction remains in the conveying gas flow for subsequent separation from the gas. An apparatus in the form of a separator is disclosed for sorting particulate material suspended within a conveying gas into coarse and fine fractions is also disclosed. The separator has a radially symmetrical wall for flow of conveying gas suspension therethrough, a vaned rotatable rotor axially aligned within the wall and means defining an annular chamber between itself and the wall for flow of a band of clean gas so that the clean gas radially surrounds the conveying gas.

REFERENCES:
patent: 667573 (1901-02-01), Pfeiffer
patent: 826772 (1906-07-01), Emerick
patent: 1457110 (1921-04-01), Gay
patent: 1756960 (1928-03-01), Stebbins
patent: 1876516 (1924-09-01), Fraser

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