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Minerals 2016, 6(3), 57; doi:10.3390/min6030057

An Investigation of Reverse Flotation Separation of Sericite from Graphite by Using a Surfactant: MF

School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
Hubei Province Key Laboratory for Processing of Mineral Resources and Environment, Luoshi Road 122, Wuhan 430070, China
Author to whom correspondence should be addressed.
Academic Editor: Massimiliano Zanin
Received: 7 April 2016 / Revised: 3 June 2016 / Accepted: 7 June 2016 / Published: 23 June 2016
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In this paper, a surfactant, atlox4862 (formaldehyde condensate of methyl naphthalene sulfonic sodium salt) (MF), was introduced as a depressant for reverse flotation separation of sericite from graphite. Natural flake graphite has a strong hydrophobic property. After interacting with MF, the graphite became moderately hydrophilic. The flotation results showed that MF had a depressing ability for both sericite and graphite and that the flotation separation of sericite from graphite was attributed to the different declining levels of recovery between graphite and sericite with increased MF concentration. For a pulp pH of 8 and a MF concentration of 250 mg/L, the recovery rates of sericite and graphite were 89.7% and 11.3%, respectively. The results of the FTIR spectra and zeta potential measurements demonstrated that the interaction of MF with graphite and sericite is mainly through electrostatic attraction. MF was preferred to adsorb on the surface of graphite, decreasing its zeta potential and improving its hydrophilicity more than that of sericite. View Full-Text
Keywords: surfactant; reverse flotation; graphite; sericite; adsorption surfactant; reverse flotation; graphite; sericite; adsorption

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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Qiu, Y.; Yu, Y.; Zhang, L.; Qian, Y.; Ouyang, Z. An Investigation of Reverse Flotation Separation of Sericite from Graphite by Using a Surfactant: MF. Minerals 2016, 6, 57.

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