Synergistic Effect of Diethylenetriamine and Sodium Metabisulphite on Xanthate-Induced Flotation of Cu-activated Pyrite

  • Samuel Asare-Asher
Keywords: Pyrite, DETA, SMBS, Flotation, Surface Analysis

Abstract

The present study investigates the effect of diethylenetriamine (DETA) and sodium metabisulfite (SMBS) on Cu-activated pyrite flotation induced by xanthate using X-ray spectroscopy (XPS) under aerated and non-aerated conditions. The study showed that DETA is more effective for pyrite depression than SMBS on an individual basis, however, high dosages of DETA (500 g/t) are required. Oxidation (aeration of the flotation pulp) of Cu-activated pyrite induced by xanthate before DETA addition has a greater effect on the surface chemistry of the pyrite particles and subsequently increased pyrite depression. The above condition decreased pyrite recovery drastically from 92% to 12%. The XPS analysis showed that the significant pyrite depression observed in the presence of DETA than SMBS, was due to significant removal of adsorbed surface Cu and the formation of Cu(I)-DETA complex on pyrite surface. 

References

Agorhom, E.A., Skinner, W. and Zanin, M., (2014), “Diethylenetriamine depression of Cu-activated pyrite hydrophobised by xanthate”, Minerals Engineering, Vol. 57, pp. 36-42.

Illyuvieva, G.V., Gorshtein, A.E. and Toropova, M.N., (1984), “Role of sulphite and thiosulphate ions in the copper-nickel sulphide ore flotation”, Chem. Abs., pp. 101: 17514n.

Kelebek, S., Fekete, S.O. and Wells, P.F., (1995), “Selective depression of pyrrhotite using sulphur dioxide-diethylenetriamine reagent combination”, In: Proc. XIX International Mineral Processing Congress, SME, Colorado, USA, Vol. 3, pp. 181-187.

Kelebek, S. and Tukel, C., (1999), “The effect of sodium metabisulfite and triethylenetetramine system on pentlandite-pyrrhotite separation”, International Journal of Mineral Processing, Vol. 57, pp. 135-152.

Mermilled-Blondin, R., Kongolo, M., de Donato, P., Benzaazous, M., Barres, O., Bussiere, B. and Aubertin, M., (2005), “Pyrite flotation with xanthate under alkaline conditions-application to environmental desulfurisation”, Centenary of Sympossium, AusIMM, Brisbane, QLD. pp. 683-692.

Miller, J.D., (1970), “Pyrite depression by reduction of solution oxidation potential”, Report to EPA Water Quality Office, Grant No. 12010 DIM.

Misra, M., Miller, J.D. and Song, Q.Y., (1985), “The effect of SO2 in the flotation of sphalerite and chalcopyrite”, In: Flotation of sulphide minerals, Forssberg, K.S.E. (Ed.), Developments in Mineral Processing, Elservier, Amsterdam, pp. 175-196.

Sui, C., Finch, J.A. and Xu, Z., (1998), “Effect of diethylenetriamine on xanthate interaction with Pb-contaminated pyrite”, Minerals Engineering, Vol. 11(7), pp. 639-649.

Voigt, S., Szargan, R. and Suoninen, E., (1994), “Interaction of Cu(II) ions with pyrite and its influence on ethyl xanthate adsorption”, Surface and Interface Analysis, Vol. 21, pp. 526-536.

Von Oertzen, G.U., Skinner, W.M., Nesbitt, H.W., Pratt, A.R. and Buckley, A.N., (2007), “Cu adsorption on pyrite (100): Ab initio and spectroscopic study”, Surface Science, Vol. 601, pp. 5794-5799.

Yamamoto, T., (1980), “Mechanism of depression of pyrite and sphalerite by sulphite”, In: Complex Sulphide Ores, Jones, M.J., (Ed.), Inst. Miner. Metall., London, pp. 71-78.

Yoon, R.H., Basilio, C.I., Marticorena, M.A., Kerr, A.N. and Stration-Crawley, R., (1995), “A study of the pyrrhotite depression mechanism by diethylenetriamine”, Minerals Engineering, Vol. 8(7), pp. 807-816.

Zanin, M. and Farrokhpay, S., (2011), “Depression of pyrite in porphyry copper flotation”, In: Proc. 8th International Mineral Processing Seminar, Procemin2011, Santiago, Chile. pp. 135-143.

Published
2018-12-28