Method and apparatus for classifying particles

Classifying – separating – and assorting solids – Fluid suspension – Gaseous

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209144, 55261, B07B 300

Patent

active

044709021

ABSTRACT:
A mixture of air and particles to be classified is ejected through a nozzle located at a lower portion of a vertical housing to deposit the ejected particles on an inner surface of the housing and to convey separated fine particles by a whirling upward air flow. Air is ejected radially beneath the nozzle to separate fine particles from the particles deposited on the inner wall and to convey upward the separated fine particles by the whirling upward air flow and to cause the coarse particles to fall down to the outside of the housing. A rotating disc with vanes is disposed in an enlarged upper portion of the housing to separate and classify said fine particles from the whirling upward air flow. The air conditioning the remaining fine particles is conveyed to a cyclone separator to separate the remaining fine particles. Preferably, the air discharged from the cyclone separator is circulated again through the housing and the cyclone separator.

REFERENCES:
patent: 1723034 (1929-08-01), Hawley
patent: 1950069 (1934-03-01), Stein
patent: 2069398 (1937-02-01), Wallace
patent: 2294921 (1942-09-01), Lykken
patent: 3455449 (1969-07-01), Nara
patent: 3670886 (1972-06-01), Hosokawa et al.
patent: 3680695 (1972-08-01), Yoshimori et al.
patent: 4059507 (1977-11-01), Yoshimori
patent: 4260478 (1981-04-01), Hosokawa et al.
patent: 4266673 (1981-05-01), Haidlen et al.

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