Abstract
Low-grade molybdenum concentrate is a typical resource to extract molybdenum, but it has long been used inefficiently due to its high contents of impurities such as Ca, Fe, Pb, and Cu. In this study, the deep purification of low-grade molybdenite concentrates have been investigated via both theory and experiments. E-pH calculation shows that acid system is beneficial to the leaching of impurities . When the pH is around zero, the oxidation potential for gangue minerals to dissolve follows the order: E (Cu2S) > E (PbS) > E (FeS). Subsequent purification tests indicate that oxidants such as FeCl3 and CuCl2 could intensify the removal of impurities but also contribute to the increase of Re loss. Thus, precise control of operating variables plays an important role in balancing the removal of impurities with Re reservation.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51874355) and the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources.
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© 2019 The Minerals, Metals & Materials Society
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Yu, J., Sun, H., Luo, J., Li, G., Jiang, T. (2019). General Rules for Deep Purification of Low-Grade Molybdenite Concentrates. In: Azimi, G., Kim, H., Alam, S., Ouchi, T., Neelameggham, N., Baba, A. (eds) Rare Metal Technology 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05740-4_12
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DOI: https://doi.org/10.1007/978-3-030-05740-4_12
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