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Minerals 2017, 7(3), 38; https://doi.org/10.3390/min7030038

Reducing the Entrainment of Gangue Fines in Low Grade Microcrystalline Graphite Ore Flotation Using Multi-Stage Grinding-Flotation Process

1
School of Resources and Civil Engineering, Wuhan Institute of Technology, Wuhan 430205, China
2
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Academic Editor: Massimiliano Zanin
Received: 14 October 2016 / Revised: 5 March 2017 / Accepted: 6 March 2017 / Published: 14 March 2017
(This article belongs to the Special Issue Flotation in Mineral Processing)
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Abstract

A suitable grinding fineness and flow-sheet could potentially reduce the mechanical entrainment of gangue minerals in the flotation process of microcrystalline graphite. In this study, the suitable grinding fineness of a commercial graphite ore was estimated by mineralogy analysis and laboratory grind-flotation tests. The target grind size of this ore should be 92% passing 74 μm based on the mineralogical evaluation and the flotation performance. A comparison of a single-stage and a three-stage grinding circuit was conducted. Experimental results demonstrated that the three-stage grinding circuit could effectively improve the separation effect, which was attributed to the reduction of slimes. In the end, a more desirable beneficiation result was obtained with the application of three-stage grinding-flotation process by minimizing gangue entrainment. View Full-Text
Keywords: froth entrainment; multi-stage grinding; multi-stage cleaning; microcrystalline graphite froth entrainment; multi-stage grinding; multi-stage cleaning; microcrystalline graphite
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Weng, X.; Li, H.; Song, S.; Liu, Y. Reducing the Entrainment of Gangue Fines in Low Grade Microcrystalline Graphite Ore Flotation Using Multi-Stage Grinding-Flotation Process. Minerals 2017, 7, 38.

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