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Minerals 2017, 7(11), 208; doi:10.3390/min7110208

Increasing the Fine Flaky Graphite Recovery in Flotation via a Combined MultipleTreatments Technique of Middlings

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
Author to whom correspondence should be addressed.
Received: 9 October 2017 / Revised: 19 October 2017 / Accepted: 19 October 2017 / Published: 1 November 2017
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As the residual flaky graphite ores become miscellaneous and fine, a single treatment technique for the middlings from the flotation process of graphite ore cannot efficiently recover the valuable graphite in the multistage grinding-flotation technology. In the study, the existence form of graphite and relationship of graphite with the associated gangue minerals were estimated by optical microscope analysis. The results indicated that the fine flaky graphite particles embedded with gangue minerals like a honeycomb, making it difficult to be beneficiated using the typical flotation technique. A combination technique of individual process and concentrated returning for the treatment of middlings was used to increase the graphite recovery based on the co-existing relationship between graphite and gangue minerals in the middlings. The graphite recovery of the final concentrate upgraded from 51.81% to 91.14% at a fixed carbon (FC) content of 92.01% by a beneficiation process consisted of once coarse (94.41% passing 74 μm) and rougher, five stages regrinding and six stages cleaning. The proposed treatment technique for middlings is of great significance to increase the recovery of fine flaky graphite. View Full-Text
Keywords: fine flaky graphite ore; flotation; middlings; combined multiple treatment fine flaky graphite ore; flotation; middlings; combined multiple treatment

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Peng, W.; Qiu, Y.; Zhang, L.; Guan, J.; Song, S. Increasing the Fine Flaky Graphite Recovery in Flotation via a Combined MultipleTreatments Technique of Middlings. Minerals 2017, 7, 208.

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