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Minerals 2018, 8(9), 402;

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China
Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources, Central South University, Changsha 410083, China
Authors to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 6 September 2018 / Accepted: 10 September 2018 / Published: 13 September 2018
(This article belongs to the Special Issue Sustainable Mineral Processing Technologies)
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Hydrogen peroxide (H2O2) is a strong oxidizer that causes non-selective oxidation of sulfide minerals, and its influence on bismuth sulfide ores is not well-documented. In this study, H2O2 was proposed as an alternative bismuthinite depressant, and its effect on a Mo-Bi-containing ore was intensively investigated by batch flotation tests. Results showed that the addition of H2O2 significantly destabilized the froth phase, thus decreasing the solids and water recovery. The recovery of bismuth in molybdenum concentrate was dramatically decreased to 4.64% by H2O2 compared with that in the absence of H2O2 (i.e., 50.14%). The modified first-order kinetic model demonstrated that the flotation rate of molybdenite slightly declined after H2O2 addition, whereas that of bismuthinite was drastically reduced from 0.30 min−1 to 0.08 min−1 under the same condition. Simulation revealed that H2O2 affected the floatability of both molybdenite and bismuthinite but resulted in more detrimental effect to bismuthinite. Hence, H2O2 has the potential to act as an effective depressant in bismuth sulfide ore flotation. View Full-Text
Keywords: molybdenite; bismuthinite; hydrogen peroxide; froth flotation molybdenite; bismuthinite; hydrogen peroxide; froth flotation

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Lin, S.; Liu, R.; Sun, W.; Hu, Y.; Han, H. Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation. Minerals 2018, 8, 402.

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