Collectorless Flotation Approach to a Low Grade Gold Ore

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Oluklulu S., Gökçen H. S., Bozkurt M. M. V., Ucbaş Y.

26th International Mining Congress and Exhibition of Turkey, Antalya, Türkiye, 16 - 19 Nisan 2019, ss.779-786 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.779-786
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In this study, flotation behavior of low grade dry ground gold ore was investigated comparatively without (collectorless) and with collector. The effects of pH and frother dosages were studied in collectorless flotation. Lime was used to adjust pH and AF70 was employed as a frother. Flotation tests with collector, potassium amyl xanthate (PAX), were performed at optimum conditions determined in collectorless flotation. Based on the results of those rougher flotation tests, open circuit flotation tests were carried out with and without (collectorless) collector. Final concentrate containing 112.39 g/t Au 12.11% Cu 13.72% Fe and 12.27% S were obtained with recoveries of 53.79% 38.64%, 1.78% and 5.71%, respectively in the case of collectorless flotation while obtaining a final concentrate having 85.80 g/t Au, 9.59% Cu, 35.16% Fe and 36.45% S with recoveries of 59.14%, 46.12%, 6.81% and 25.54% flotation with collector. It was also possible to obtain alternative final concentrate containing 221.57 g/t Au, 21.08 % Cu, 19.41% Fe and 21.32% S with recoveries of 43.89%, 31.55%, 0.99% and 4.22%, respectively by lowering the frother dosage in collectorless flotation.