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Minerals 2017, 7(7), 125; https://doi.org/10.3390/min7070125

The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

1
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
Department of Mining Engineering, University of Kentucky, Lexington, KY 40506, USA
*
Author to whom correspondence should be addressed.
Received: 29 May 2017 / Revised: 14 July 2017 / Accepted: 15 July 2017 / Published: 20 July 2017
(This article belongs to the Special Issue Flotation Chemistry)
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Abstract

The influence of conditioning on the flotation of pyrrhotite in the presence of chlorite was investigated through flotation tests, sedimentation tests, and X-ray photoelectron spectroscopy (XPS) analysis. The flotation results show that chlorite slimes dramatically impair the flotation of pyrrhotite. Sedimentation and flotation tests reveal that conditioning can effectively remove chlorite slimes from pyrrhotite surfaces, resulting in an enhanced flotation recovery of pyrrhotite. When mixed minerals were conditioned under the natural atmosphere, a faster conditioning speed and longer conditioning time decreased the flotation recovery of pyrrhotite. However, when mixed minerals were conditioned under a nitrogen atmosphere, a more intensive conditioning process provided better flotation results. XPS analyses illustrate that a faster conditioning speed and longer conditioning time under the natural atmosphere accelerates the oxidation of pyrrhotite, leading to a decrease in the flotation recovery of pyrrhotite. View Full-Text
Keywords: conditioning; pyrrhotite; chlorite; flotation conditioning; pyrrhotite; chlorite; flotation
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Chen, Y.; Shi, Q.; Feng, Q.; Lu, Y.; Zhang, W. The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite. Minerals 2017, 7, 125.

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