Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension and sifting
Patent
1989-09-20
1990-09-11
Hajec, Donald T.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension and sifting
75634, 75637, 209 3, 209269, 209360, 209380, 266101, B01D 3300
Patent
active
049554824
ABSTRACT:
In carbon-in-pulp (CIP) and carbon-in-leach (CIL) processes, especially those utilizing pure oxygen instead of normal air to increase the overall efficiency of the cyanide leaching-adsorption process in the recovery of gold and/or silver from ores, the screen within each tank which surrounds the slurry outlet is kept clean. The cleaning action is accomplished by linearly reciprocating the screen first slowly in one direction, and then quickly in another (to cause back flushing); or by rotating a cleaning rotor on the inside of a cylindrical screen. The cleaning rotor may be connected to the same shaft as an agitator disposed above a draft tube within the tank. The screen surface is tapered in its direction of movement, and during movement has a tendency to transport and concentrate the carbon (charcoal) particles at the far end of the slow stroke, and the concentrated particles can be withdrawn and recirculated to other tanks in the system.
REFERENCES:
patent: 2463526 (1949-03-01), Dickson
patent: 2874848 (1959-02-01), Cannon et al.
patent: 3870640 (1975-03-01), Reece
patent: 4033863 (1977-07-01), Stone
patent: 4041560 (1977-08-01), Jacobsen
patent: 4251352 (1981-02-01), Shoemaker
patent: 4368628 (1983-01-01), Jacobsen
patent: 4416774 (1983-11-01), Taylor
patent: 4754953 (1988-07-01), Brison et al.
patent: 4900430 (1990-02-01), Elmore et al.
"Gold and Silver Recovery Innovations", Phase III, vol. 7, Chapter 42, pp. 4079-4184, received 10-13-88.
Elmore Carl L.
Mitchell Phillip
Hajec Donald T.
Kamyr Inc.
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