Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/64973
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Type: Journal article
Title: Effects of high magnesium ion concentration on KC1 flotation: Part II - Plant research
Author: Weedon, D.
Grano, S.
Akroyd, T.
Goncalves, K.
Mourad, R.
Citation: Minerals Engineering, 2007; 20(7):716-721
Publisher: Pergamon-Elsevier Science Ltd
Issue Date: 2007
ISSN: 0892-6875
Statement of
Responsibility: 
David Weedon, Stephen Grano, Timothy Akroyd, Keila Goncalves, Rogerio Moura
Abstract: There appears to be several mechanisms affecting the recovery of coarse KCl particles as they flow through the flotation circuit of the Taquari Vassouras mine (Companhia Vale do Rio Doce; CVRD), Aracaju, Brazil in the presence of continually increasing concentrations of carnallite. The increase in carnallite assists in the deposition of fine NaCl and KCl crystals on the surface of the coarse KCl particles. The effect seems to be a slight net improvement in the surface hydrophobicity and therefore flotation recovery of the coarse KCl particles. As the concentration of Mg2+ ions increase, the precipitation of fine crystals of NaCl and KCl starts to increase. These NaCl crystals appear to have fine inclusions of KCl on the surface (and vice versa) which appear to attract collector, thus reducing hydrophobicity and flotation recovery of the coarse KCl feed. It is at this stage that the removal of fine precipitates appears to become critical in order to provide enough collector coverage of the coarse KCl particles to keep them floating. © 2007.
Keywords: Non-metallic ores
Flotation depressants
Surface modification
Mineral processing
Ore mineralogy
Rights: © 2007 Published by Elsevier Ltd.
DOI: 10.1016/j.mineng.2007.01.009
Published version: http://dx.doi.org/10.1016/j.mineng.2007.01.009
Appears in Collections:Aurora harvest
Geology & Geophysics publications

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