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Minerals 2016, 6(2), 38;

Beneficiation of a Sedimentary Phosphate Ore by a Combination of Spiral Gravity and Direct-Reverse Flotation

1, 1,2,3,*, 1,2,3, 1,2,3, 1,2,3 and 1
College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan 430081, China
Hubei Provincial Engineering Technology Research Center of High efficient Cleaning Utilization for Shale Vanadium Resource, Wuhan 430081, China
Author to whom correspondence should be addressed.
Academic Editors: Massimiliano Zanin and Kota Hanumantha Rao
Received: 1 February 2016 / Revised: 29 March 2016 / Accepted: 13 April 2016 / Published: 20 April 2016
PDF [3589 KB, uploaded 20 April 2016]


In China, direct-reverse flotation is proved to be applicable to most phosphate ores. However, because the ratio of froth product is generally high, current direct-reverse technology faces challenges in terms of high reagent consumptions and cost. A new gravity and flotation combined process has been developed for the recovery of collophanite from sedimentary phosphate ore from the beneficiation plant of Hubei, China. In this process, 53% of the collophanite was firstly recovered by gravity separation, reducing the mass flow to direct flotation. The gravity tailing was the feed for the direct flotation. The flotation concentrate, mixed with gravity concentrate, was then subjected to reverse flotation. A final concentrate with a grade of 30.41% P2O5 at a recovery of 91.5% was produced from the feed analyzing 21.55% P2O5. Compared to the conventional direct-reverse flotation 86.1% recovery at 31.69% P2O5, it was found that pre-recovery of collophanite by spiral separation could significantly reduce the flotation reagent consumption and lead to improved overall collophanite recovery. The benefits of the new process in terms of cost savings were also discussed. View Full-Text
Keywords: sedimentary phosphate ore; spiral gravity separation; direct-reverse flotation sedimentary phosphate ore; spiral gravity separation; direct-reverse flotation

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Liu, X.; Zhang, Y.; Liu, T.; Cai, Z.; Chen, T.; Sun, K. Beneficiation of a Sedimentary Phosphate Ore by a Combination of Spiral Gravity and Direct-Reverse Flotation. Minerals 2016, 6, 38.

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