Abstract
A comparison of the amount of collector sodium diisobutyl dithiophosphinate (DBPhos) adsorbed on the surface of galena and pyrite has been investigated by time of flight secondary ion mass spectrometry (TOF-SIMS). Statistical comparison of spectra from both galena and pyrite particles showed that there was approximately 12 times more collector on galena compared to pyrite. Galena particles that reported to the concentrate showed statistically less calcium, lead hydroxide and oxy-sulphur species on their surfaces compared to tail particles. The major contributions that assisted the flotation of galena were the presence of hydrophobic DBPhos and PbDBPhos. Reduced collector adsorption and increased hydrophilic species concentrations inhibited the flotation of pyrite.
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