Abstract

Rest potential and cyclic voltammetry studies were conducted on chalcocite and heazlewoodite as a function of pH in the presence and absence of the sulfllydryl collectors, sodium ethyl xanthate (EX) and the sodium salt ofmercaptobenzothiazole (MBT). The minerals showed a significant difference in their response both in the presence and absence of collectors. The voltammograms suggested that EX− and MBT− interact with the minerals in a similar manner. Most reactions of chalcocite and heazlewoodite in the presence and absence of EX were identified from the literature. For the case of MBT and chalcocite the following new reaction is proposed at E e = −0.060 V:Cu2S+2MBT− → 2CuMBT+S0+2e−. Résumé Des études du potentiel à repos et la voltammetrie cyclique ont été entreprisés sur le chalcocite et le heazlewoodite en fonction de pH en présence et en absence des collecteurs sulfhydryl sodium ethyl xanthate (EX) et le sel sodium de mercaptobenzothiazole (MBT). Les minéraux différents manifestent des réponses différentes, en présence et en absence des collecteurs. Les voltammogrammes indiquent que l'EX et I'MBT réagent avec les minéraux en façons semblables. La plupart des réactions du chalcocite et du heazlewoodite en présence et en absence de l'EX existent dans la littérature. Pour le cas de MBT/chalcocite à E e = −0.060 V, une nouvelle réaction est proposée:Cu2S+2MBT− → 2CuMBT+S0+2e−.

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