Research on the Green Combined Depressor for Flotation Separation of Lead from Copper
The study of a combined depressor for flotation separation of lead from copper has been carried
on aim at solving the copper-lead separation problem. Test results show that the depressor of CMC
(Carboxy Methylated Cellulose) or sodium sulfite perform an important function on selectivity inhibit
of the galena flotation, when combine the two reagents above, the selectivity depressing effect on the
galena is even more. And the further test results show when the CMC and sodium sulfite proportion is
1:4, selectivity co-inhibition on galena was the strongest, and the content of lead in the copper
concentrate is the lowest.
Closed-circuit test show that under the condition of certain slurry pH value, with the best
proportion of CMC and sodium sulfite as depressor, the copper concentrate with 28.23% copper,
4.12% lead can be obtained , and the copper recovery rate is 84.87% ; Lead concentrate containing
68.12% lead, 0.86% copper was obtained, the lead recovery was 92.20%, realize the efficient
separation of copper and lead.
KEYWORDS
separation of copper and lead, combined depressor, CMC, sodium sulfite