THE SURFACE AND SOLUTION CHEMISTRY OF PYRITE FLOTATION WITH XANTHATE IN THE PRESENCE OF IRON IONS

Authors
JIANG CL WANG XH PAREKH BK LEONARD JW
Citation
Cl. Jiang et al., THE SURFACE AND SOLUTION CHEMISTRY OF PYRITE FLOTATION WITH XANTHATE IN THE PRESENCE OF IRON IONS, Colloids and surfaces. A, Physicochemical and engineering aspects, 136(1-2), 1998, pp. 51-62
Citations number
31
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
136
Issue
1-2
Year of publication
1998
Pages
51 - 62
Database
ISI
SICI code
0927-7757(1998)136:1-2<51:TSASCO>2.0.ZU;2-5
Abstract
The effects of the surface and solution chemistry of the Fe(II) and Fe (III) ions on the notation of both ore-and coal-pyrite with xanthate h ave been systematically investigated based on flotation results, zeta potential measurements and thermodynamic calculations. It was found th at the presence of ferrous and ferric ions in solution significantly d epresses ore-pyrite flotation in the pH range of 6-9.5. The effect of ferrous ions is stronger than that of ferric ions. Coal pyrite was fou nd to be nonfloatable above pH 6 due to the large amounts of ferrous i ons resulted from pyrite oxidation. The results of thermodynamic calcu lations have been found to be in good agreement with the experimental results, indicating that the formation of ferric hydroxyl xanthate com pounds are responsible for the reduced floatabilities of pyrites when pH is greater than 6. (C) 1998 Elsevier Science B.V.