Amine-oleate interactions in feldspar flotation

Orhan E., Bayraktar I.

MINERALS ENGINEERING, vol.19, no.1, pp.48-55, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 1
  • Publication Date: 2006
  • Doi Number: 10.1016/j.mineng.2005.06.001
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.48-55
  • Hacettepe University Affiliated: No


This study concerns the interaction between residual amine (tallow amine acetate) and sodium oleate for floating mica and metal-oxides respectively from a feldspar ore of Cine-Milas region of Turkey. Zeta-potential measurements show the co-adsorption of oleate onto feldspar surfaces only if amine is present. Zeta-potential measurements are in good compliance with laboratory scale flotation tests. Flotation tests show that the amine concentration ought to be kept lower than 1.47 x 10(-5) mol/l (approximate to 5 ppm) to prevent feldspar loss during metal-oxides flotation stage and hence dewatering/washing operation after mica flotation seems to be a crucial step. Feldspar recovery in the concentrate, being 86.67% without dewatering/washing increases to 94.58% after three stage dewatering/washing between mica and metal-oxides flotation stages. In order to get rid of the residual amine, as an alternative to dewatering, 300 g/t bentonite as the residual amine adsorber is used right after mica flotation and it helps to remove 97.7% of the residual amine in the cell. Bentonite addition provided almost the same feldspar recoveries compared with that of dewatering/washing. (c) 2005 Elsevier Ltd. All rights reserved.