Quantifying hydrophobicity of pyrite after copper activation and DTPI addition under electrochemically controlled conditions

Hicyilmaz C., Altun N., Ekmekci Z., Gokagac G.

MINERALS ENGINEERING, cilt.17, ss.879-890, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.mineng.2004.02.007
  • Dergi Adı: MINERALS ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.879-890
  • Anahtar Kelimeler: froth flotation, flotation collectors, redox reactions, sulphide ores, pH control, SULFIDE MINERALS, ADSORPTION MECHANISM, FLOTATION, SURFACE, CHALCOPYRITE, XPS, SPHALERITES, XANTHATE, FTIR, LEAD
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this study, the response of the surface of pyrite to copper activation under electrochemically controlled conditions was investigated in the presence and absence of sodium diisobutyl dithiophosphinate (DTPI). The mechanism of interactions between the concerned reagents and pyrite was investigated using cyclic voltarnmetry in solutions of different pH. In addition, contact angle measurements were performed to determine the wetting behavior of the pyrite surface as a function of pulp potential and pH. The results of both the cyclic voltammetry and contact angle measurements were evaluated to identify the nature of the species formed at the pyrite surface and to explain the underlying mechanism. Both phases of the experiments confirmed that the mechanism of copper activation of pyrite occurred through certain electrochemical reactions, whereas the mutual interactions between DTPI-pyrite and Cu-DTPI couples relied on chemical means. (C) 2004 Elsevier Ltd. All rights reserved.