Coal washing apparatus

Details Coal washing apparatus Coal washing apparatus

1977-08-08

1979-06-26

Lutter, Frank W.

Classifying, separating, and assorting solids

Plural, diverse separating operations

Sifting and stratifying

209 17, 209270, 209291, 209452, B03B 700

Patent

active

041592425

ABSTRACT:
An apparatus for separating coarse and fine particles of intermediate specific gravity from an aggregate containing said particles of intermediate specific gravity as well as fine and coarse particles of higher specific gravity by use of a liquid of lesser specific gravity than any of said particles, which apparatus includes a pair of inclined, axially rotating, concentrically disposed helical ribbon flights separately secured within an annular housing such that the rotating action of said flights transports the fine and coarse particles of heavier specific gravity out of the flowing aggregate slurry. The fluid is then drained from the intermediate specific gravity particles passing with the fluid through the lower end of the annular housing in a screened cylinder.

REFERENCES:
patent: 2323154 (1943-06-01), Ransohoff
patent: 3462018 (1969-08-01), Hastrup
patent: 3815737 (1974-06-01), Katter

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