B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
361/3, 53/324
B03D 1/02 (2006.01) B03B 9/00 (2006.01) B03D 1/06 (2006.01)
Patent
CA 1130934
ABSTRACT OF THE DISCLOSURE A process for the recovery of copper and zinc values from copper and zinc containing sulphidic ore in- cludes subjecting ground ore to a flotation operation. An initial copper concentrate is floated in a first flotation step, and the initial copper concentrate is fed to a second flotation step to float a relatively zinc free copper con- centrate. Remaining ore from the first flotation step is fed to a third flotation step to float an initial zinc concen- trate, and remaining ore from the third flotation step is fed to a fourth flotation step to float a copper and zinc containing material. An intermediate concentrate containing from about 5 to bout 25% copper and from about 2 to about 25% zinc, with a total of at least about 12% copper and zinc, is produced by selecting at least the remaining ore from the second flotation step, and a zinc concentrate containing at least about 20% zinc is produced by at least selecting a portion of the initial zinc concentrate.
345417
Gowling Lafleur Henderson Llp
Sherritt International Consultants Inc.
LandOfFree
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