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Minerals 2017, 7(8), 141;

The Interaction between Ca2+ and Molybdenite Edges and Its Effect on Molybdenum Flotation

College of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an 710055, China
JinDuiCheng Molybdenum Co., Ltd., Xi’an 710077, China
China Molybdenum Co., Ltd., Luanchuan 471500, China
School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane 4072, Australia
Authors to whom correspondence should be addressed.
Academic Editor: William Skinner
Received: 7 July 2017 / Revised: 2 August 2017 / Accepted: 7 August 2017 / Published: 9 August 2017
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In this paper, the influence of Ca2+ on the flotation of a skarn type molybdenum ore and pure molybdenite mineral at pH 8 was studied using diesel as the collector. It was found that Ca2+ had little effect on molybdenum flotation at low concentrations. By further increasing Ca2+ concentration, the floatability of molybdenite—especially from the fine size fractions—was depressed even without the presence of fine gangue minerals. The mechanism responsible for the deleterious effect of Ca2+ on molybdenite flotation was studied by a range of techniques including zeta potential measurements, Scanning Electron Microscopy, and Energy Dispersive X-ray Spectrometer (SEM-EDS) analyses and molybdenum phase analyses. It was found that Ca2+ interacted with molybdenite edges producing CaMoO4 precipitates which were responsible for the depression of molybdenite flotation of Ca2+ by preventing the adsorption of diesel. View Full-Text
Keywords: calcium molybdate; molybdenite edges; flotation calcium molybdate; molybdenite edges; flotation

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Wan, H.; Yang, W.; Cao, W.; He, T.; Liu, Y.; Yang, J.; Guo, L.; Peng, Y. The Interaction between Ca2+ and Molybdenite Edges and Its Effect on Molybdenum Flotation. Minerals 2017, 7, 141.

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