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Minerals 2017, 7(5), 65; doi:10.3390/min7050065

Ambient Temperature Flotation of Sedimentary Phosphate Ore Using Cottonseed Oil as a Collector

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
School of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, China
School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China
Author to whom correspondence should be addressed.
Academic Editor: Massimiliano Zanin
Received: 17 March 2017 / Revised: 17 April 2017 / Accepted: 18 April 2017 / Published: 26 April 2017
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The mid-low grade sedimentary phosphate ore, abundant in silicate and carbonate gangue minerals, exhibits a poor processability. It is conventionally enriched using high temperature flotation to remove silicate gangues with fatty acid as a collector. Cottonseed oil has been proved to be an efficient collector for achieving ambient temperature flotation of the sedimentary phosphate ore used in this study. Flotation kinetics was investigated to ascertain the excellent collecting performance of cottonseed oil, as compared with oleic acid, and the phosphate flotation fitted well with the first-order flotation model. Based on the analysis of flotation reagent effect on the direct flotation process using the response surface methodology (RSM), a closed circuit of direct-reverse flotation for stepwise removing silicate and carbonate gangues from the sedimentary phosphate ore was established. Consequently, a required high quality of phosphate concentrate containing 30.16% P2O5 was obtained, with a recovery of 90.90%. Scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) of the flotation products confirmed that the majority of silicate and carbonate gangues were effectively removed from the concentrate products. View Full-Text
Keywords: cottonseed oil; sedimentary phosphate ore; flotation; ambient temperature cottonseed oil; sedimentary phosphate ore; flotation; ambient temperature

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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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Ruan, Y.; Zhang, Z.; Luo, H.; Xiao, C.; Zhou, F.; Chi, R. Ambient Temperature Flotation of Sedimentary Phosphate Ore Using Cottonseed Oil as a Collector. Minerals 2017, 7, 65.

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