Copper Flotation

Chrysocolla Flotation

The effect of pH on the flotation response of Chrysocolla and chalcocite with potassium octyl hydroxamate as collector. The potential for the chalcocite system is slightly oxidizing.


A detailed electrochemical investigation of chalcocite with a collector that does not oxidize, namely a chelating compound, potassium octyl hydroxamate shows

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Effect of pH on Copper Cleaner Flotation (after Regrind Circuit)

In the study, batch cleaner tests were conducted to confirm the target regrind size and select the cleaner pH conditions. The objective of the high pH, collector-starved environment in the cleaners is:

  1. To liberate and reject attached silicates,
  2. Depress the previously-floated pyrite.

If the floatability imparted on the pyrite in rougher flotation is not adequately depressed during regrinding and cleaning, it will continue to float.

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Copper – Lead Separation by Lead Depression

Another method to separate Pb from Cu is in depressing the lead away from the copper to float. Here, three batch cleaner tests were performed with additional depressants to reject more lead from the copper flotation concentrate. The baseline test utilized no MBS depression in the rougher circuit to maximize copper recovery, but MBS depression

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