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Extraction of Vanadium from Vanadium Slag Via Non-salt Roasting and Ammonium Oxalate Leaching

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Abstract

A clean method featuring non-salt roasting followed by (NH4)2C2O4 leaching to recover vanadium from vanadium slag was proposed. The carcinogenic Cr6+ compounds and exhaust gases were avoided, and the water generated from vanadate precipitation may be recycled and reused in this new leaching process. The leaching residues may be easily used by a blast furnace. Moreover, (NH4)2C2O4 solution was used as a leaching medium to avoid expensive and complicated ammonium controlling operations as a result of the stability of (NH4)2C2O4 at a high temperature. The transformation mechanisms of vanadium- and chromium-bearing phases were systematically investigated by x-ray diffraction analysis and scanning electron microscopy with energy-disperse x-ray spectrometry, respectively. In addition, the effects of oxygen concentration, roasting temperature, and holding time on vanadium recovery were investigated. Finally, the effects of leaching variables on the vanadium leaching rate were also examined.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grants 51404227, 51604254, and 91634111), the Science and Technology Service Network Initiative for the Chinese Academy of Sciences (Grant KFJ-SW-STS-148), and the National Basic Research Program of China (973 Program, Grant 2013CB632605). The financial support provided by the China Scholarship Council (CSC) for Meng Li (201506080059) to the University of British Columbia (UBC) is also acknowledged.

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, People’s Republic of China

    Meng Li

  2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Meng Li, Hao Du, Shili Zheng, Shaona Wang, Yang Zhang, Biao Liu & Yi Zhang

  3. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Hao Du

  4. Department of Materials Engineering, University of British Columbia, Vancouver, BC, V6T1Z4, Canada

    Meng Li & David Bruce Dreisinger

Authors
  1. Meng Li
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  2. Hao Du
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  3. Shili Zheng
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  4. Shaona Wang
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  5. Yang Zhang
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  6. Biao Liu
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  7. David Bruce Dreisinger
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  8. Yi Zhang
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Corresponding authors

Correspondence to Biao Liu or David Bruce Dreisinger.

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Li, M., Du, H., Zheng, S. et al. Extraction of Vanadium from Vanadium Slag Via Non-salt Roasting and Ammonium Oxalate Leaching. JOM 69, 1970–1975 (2017). https://doi.org/10.1007/s11837-017-2494-4

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  • DOI: https://doi.org/10.1007/s11837-017-2494-4

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