Process for a selective flotation of a copper-lead-zinc sulfide

Details Process for a selective flotation of a copper-lead-zinc sulfide Process for a selective flotation of a copper-lead-zinc sulfide

B - Operations, Transporting

03

D

B03D 1/02 (2006.01) B03B 1/00 (2006.01) B03D 1/06 (2006.01)

Patent

CA 2107275

-18- ABSTRACT PROCESS FOR A SELECTIVE FLOTATION OF COPPER-LEAD- ZINC SULFIDE ORES In a process for a selective flotation of a copper-lead-zinc sulfide ore the raw ore is ground and slurried with water and the resulting suspension is aerated with air to adjust a certain oxidation-reduction potential and is subsequently successively conditioned with SO2, Ca(OH)2, and collecting and frothing agents, whereafter a flota- tion of Cu is effected. An oxidation-reduction poten- tial which is 70 to 90% of the oxidation-reduction potential desired for the flotation of Cu is adjusted by the aeration of the suspension with air before the flotation of Cu, the desired oxidation-reduction po- tential of 60 to 340 mV is adjusted during the flota- tion of Cu by the aeration with air, the flotation of Cu is effected at a pH of 8.5 to 10.5 and Cu is removed from the flotation process with the froth.

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