Classifying – separating – and assorting solids – Plural – diverse separating operations – Gaseous suspension – sifting – and stratifying
Patent
1989-08-07
1991-06-25
Hajec, Donald T.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Gaseous suspension, sifting, and stratifying
209 20, 209 24, 209 32, 209152, B03B 700, B07B 902
Patent
active
050259296
ABSTRACT:
An air classifier for separating light reusable materials from a stream of non-shredded solid waste is provided. The air classifier employs two operating phases. The first operating phase, the desired light fraction is entrained in an air stream and is conveyed above the remainder of the solid waste. The waste material is then received by a second conveyor so that the lighter fraction is received on top of the heavier fraction. Thus, the first phase of the apparatus effects mass stratification. During the second operating phase, the light fraction is actually removed from the heavy fraction by a high velocity air stream which is preferably induced by a reducing cross-section portion of the apparatus. The air flow through the apparatus is captured and recycled and the light fraction being separated therefrom in, for example, a cyclone.
REFERENCES:
patent: 132577 (1872-10-01), Hillman
patent: 3113099 (1963-12-01), Schmitz
patent: 3447678 (1969-06-01), Henry
patent: 4107034 (1978-08-01), Paterson et al.
patent: 4150632 (1979-04-01), Matthews
patent: 4278532 (1981-07-01), Birch et al.
patent: 4853112 (1989-08-01), Brown
Hajec Donald T.
Sorain Cecchini Recovery, Incorporated
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