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The collector reagents favour the hydrophobic and aerophilic condition of the sulphide particles of the metals to be recovered, so that they separate from the water and adhere to the air bubbles.

They should be used by selecting the mineral of primary interest to prevent the recovery of other minerals.

  • Xanthates:  Chemical reagents used for mineral concentration by the conventional flotation method. Composed of alcohols, Sodium and Potassium. Mainly used as a primary collector in sulphide minerals, polymetallic PAX, SIPX, SIBX
  • Thiocarbamate:  Are oily collectors derived from Ethyl Propyl thiocarbamate. It is generally used in flotation circuits in PH from 4 to 12. Used mainly for the recovery of copper, silver, gold and nickel minerals in the presence of oxidized minerals or silty clays.
  • Dithiophosphates:  Highly selective collector, for this reason it is used as a secondary collector. Used mainly for gold and silver recovery when associated with sulphide minerals.
  • Dithiocarbamate:  Secondary collectors, preferably used in sulfate-associated minerals. Like copper and silver sulfates. Provides higher flotation speed and high selectivity.