Screen cleaning in cil and cip systems

Details Screen cleaning in cil and cip systems Screen cleaning in cil and cip systems

C - Chemistry, Metallurgy

22

B

53/226

C22B 3/24 (2006.01) B01D 11/02 (2006.01) B01D 29/11 (2006.01) B01D 33/01 (2006.01) B01D 36/00 (2006.01) B07B 1/50 (2006.01) C22B 11/08 (2006.01) B01D 11/00 (2006.01)

Patent

CA 1311362

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concentrate the carbon (charcoal) particles at the far end of the slow stroke, and the concentrated particles can be withdrawn and recirculated to other tanks in the system.

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