Effect of grinding media on the activation of pyrite flotation

Peng, Yongjun and Grano, Stephen (2010) Effect of grinding media on the activation of pyrite flotation. Minerals Engineering, 23 8: 600-605. doi:10.1016/j.mineng.2010.02.003

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ206741.pdf HERDC combined application/pdf 67.85KB 0

Author Peng, Yongjun
Grano, Stephen
Title Effect of grinding media on the activation of pyrite flotation
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2010-07
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.mineng.2010.02.003
Volume 23
Issue 8
Start page 600
End page 605
Total pages 6
Place of publication Oxford, England
Publisher Pergamon Press
Collection year 2011
Language eng
Subject 0904 Chemical Engineering
Formatted abstract
In previous study, it has been found that the grinding conditions have a great effect on the flotation of chalcopyrite and galena as well as their separation from pyrite (Peng et al., 2003a,b). In this study, the effect of the grinding conditions on the activation of pyrite by Cu2+ and Pb2+ were investigated. Based on flotation behaviour, EDTA (ethylene diamine-tetra acid) extraction, pulp potential measurement and electrokinetic study, it is found that the activation of pyrite flotation by Cu2+ and Pb2+ involves different mechanisms. Reduction of copper(II) to copper(I) and the formation of new copper sulphide phases are responsible for the activation of pyrite flotation by Cu2+. This is an electrochemical process. However, adsorption of lead hydroxide on pyrite surface is principally responsible for the activation of pyrite flotation by Pb2+. The effect of grinding media on the flotation of pyrite activated by Cu2+ or Pb2+ is through the change of pulp potential and iron oxidation species emanating from the media. The iron oxidation species from grinding media is electrostatically repulsive with respect to copper-activated pyrite and therefore, reducing conditions produced by mild steel medium promotes pyrite flotation in the presence of Cu2+. However, iron oxidation species from grinding media is electrostatically attractive with respect to lead-activated pyrite and therefore inert grinding medium favours pyrite flotation in the presence of Pb2+. This study provides a clear picture of how to increase or decrease pyrite flotation through a smart selection of grinding media. © 2010 Elsevier Ltd. All rights reserved.
Keyword Grinding media
Pyrite flotation
Activation
Copper
Lead
Collectorless Flotation
Xanthate Adsorption
Sulfide Minerals
Galena
Oxidation
Chalcopyrite
Copper
Ions
Concentrator
Separation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 2 March 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 23 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 04 Jul 2010, 00:01:56 EST