Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension and sifting
Patent
1980-03-03
1981-08-04
Hill, Ralph J.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension and sifting
2091725, 209454, 209496, B03B 700, B03B 566
Patent
active
042820880
ABSTRACT:
A process for the wet concentration and cleaning of fine coal is provided which comprises the steps of desliming and thickening a dilute slurry of fine coal and contaminant particles having a size of less than about 10 mm by introducing the same to a hydrocyclone separator to retain a slurry of particles having a size greater than about 0.1 mm, wet concentrating the last-named slurry and removing the heavier contaminant particles by introducing it to an autogenous dense medium separation vessel having a manifold for injecting water at an intermediate level and controlling the underflow of heavier than coal particles to maintain a fluidized bed of heavier particles and causing a slurry of the lighter coal particles to overflow, and concentrating and dewatering the overflow by means of a static or vibratory sizing screen.
REFERENCES:
patent: 1895505 (1933-01-01), Wuensch
patent: 2417660 (1947-03-01), Remick
patent: 2497790 (1950-02-01), Pauvrasseau
patent: 4028228 (1977-06-01), Ferris et al.
Hill Ralph J.
Linatex Corporation of America
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