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We have a Pb/Cu operation. We make a bulk concentrate and then float the Cu and depress the Pb.
We would like to evaluate using Carboxymethyl Cellulose (CMC) along with other new reagents in a Cu/Pb separation circuit to eliminate using Sulfur Dioxide (SO2). We currently use SO2/Sodium Bichromate/Starch to lower the pH to 4.0 and float the chalcopyrite away from galena.
I have seen that a mixture of (1) CMC with Potassium Dichromate and Monosodium Phosphate and (2) CMC with Sodium Bisulfite Sodium Phosphate will also allow separation of Cu from Pb. What is the typical reagent dosages (cc/min or g per tonne of feed) for using mixture 1 (Potassium Dichromate/CMC/Monosodium Phosphate) and dosage for mixture 2 (Sodium Bisulfite/CMC/Sodium Phosphate)? Are there any published papers on these reagent schemes I can reference? Thanks!