Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension and sifting
Patent
1984-06-06
1986-04-22
Lutter, Frank W.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension and sifting
2091725, 209211, B03B 700
Patent
active
045840946
ABSTRACT:
A method and system for reclaiming coal by separating useable coal from refuse includes a pre-conditioning stage wherein a raw feed stock of coal and refuse is mixed with a liquid medium, and a separation stage wherein the pre-conditioned feed stock is processed to separate useable coal from the refuse. In the pre-conditioning stage, the raw feed stock is used to prepare a slurried medium containing particulate material of a predetermined particulate size and of a pre-selected specific gravity. In the washing stage, the slurried medium is separated into two separated slurries, one being of lesser specific gravity than the slurried medium and the other being of greater specific gravity than the slurried medium. Usable coal is separated from the slurry of lesser specific gravity and refuse is separated from the slurry of greater specific gravity. The effluent from the slurries of lesser and greater specific gravities is collected for use in preparing the slurried medium in the pre-conditioning stage.
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Lithgow Thomas M.
Lutter Frank W.
Winger Jon C.
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