Float-sink separation of coal with liquid SO.sub.2

Details Float-sink separation of coal with liquid SO.sub.2 Float-sink separation of coal with liquid SO.sub.2

1978-12-26

1980-04-15

Hill, Ralph J.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209172, 299 5, 241 20, 241 1, 44 1SR, B03B 544

Patent

active

041982916

ABSTRACT:
The float-sink separation of coal from pyrite and ash in a bath of liquid SO.sub.2 is disclosed. The specific gravity of the bath may adjusted by the addition of inert materials such as miscible materials or finely divided solids. Additional separation in another dense medium may be employed. The communition, conveying and mining of coal with liquid SO.sub.2 is also disclosed.

REFERENCES:
patent: 3863846 (1975-02-01), Keller et al.
patent: 3926575 (1975-12-01), Meyers
patent: 3997435 (1976-12-01), Farnum et al.
patent: 4120664 (1978-10-01), Gleim
patent: 4146366 (1979-03-01), Keller

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