Screen cleaning in CIL and CIP systems

Details Screen cleaning in CIL and CIP systems Screen cleaning in CIL and CIP systems

1985-09-20

1990-02-13

Kashnikow, Andres

Classifying, separating, and assorting solids

Plural, diverse separating operations

Aqueous suspension and sifting

209269, 209317, 209346, 209360, 210384, 210388, B01D 3300

Patent

active

049004301

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concentrate the carbon (charcoal) particles at the far end of the slow stroke, and the concentrated particles can be withdrawn and recirculated to other tanks in the system.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: 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

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