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Microemulsion leaching of vanadium from sodium roasted vanadium slag by fusion of leaching and extraction processes

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  • Received: 5 May 2020Revised: 21 May 2020Accepted: 22 May 2020Available online: 24 May 2020
  • In this work, the fusion of leaching and purification steps is realized by directly using microemulsion as the leaching agent. The DEHPA/n-heptane/NaOH microemulsion system has been established to directly leach vanadates from sodium roasted vanadium slag. The effect of leaching arguments on the leaching efficiency is investigated, including the molar ratio of H2O/NaDEHP (W), the DEHPA concentration of, solid/liquid ratio, stirring time, and leaching temperature. In optimal situations, the vanadium leaching efficiency could attain 79.57%. Both the XRD characterization of the leaching residue and the Raman spectrum of the microemulsion before and after leaching demonstrate the successful entrance of vanadates from sodium roasted vanadium slag into the microemulsion. The proposed method has realized the leaching and purification of vanadates in one step, which significantly reduces the production cost and environmental pollution. It affords new ways of thinking about the greener recovery of valuable metals from solid resources.
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  • [1] Jun-yi Xiang,Xin Wang,Gui-shang Pei,Qing-yun Huang, and Xue-wei Lv, Solid state reaction of CaO-V2O5 mixture: A fundamental study for the vanadium extraction process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2136-7
    [2] Xiao-yi Shen,Hong-mei Shao,Ji-wen Ding,Yan Liu,Hui-min Gu, and Yu-chun Zhai, Zinc extraction from zinc oxidized ore using (NH4)2SO4 roasting−leaching process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2015-2
    [3] Sandeep Kumar Jena,Jogeshwar Sahu,Geetikamayee Padhy,Swagatika Mohanty, and Ajit Dash, Chlorination roasting-coupled water leaching process for potash recovery from waste mica scrap using dry marble sludge powder and sodium chloride, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-1994-3
    [4] Gen-zhuang Li,Jue Kou,Yi Xing,Yang Hu,Wei Han,Zi-yuan Liu, and Chun-bao Sun, A study of gold leaching performance and mechanism by sodium dicyanamide, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2153-6
    [5] Xiao-yi Shen,Yuan-yong Liang,Hong-mei Shao,Yi Sun,Yan Liu, and Yu-chun Zhai, Extraction and kinetic analysis of Pb and Sr from the leaching residue of zinc oxide ore, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-1972-9
    [6] Lei Tian,Ao Gong,Xuan-gao Wu,Xiao-qiang Yu,Zhi-feng Xu, and Li-jie Chen, Process and kinetics of the selective extraction of cobalt from high-silicon low-grade cobalt ore by ammonia leaching, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2161-6
    [7] Shi-yuan Liu,Yu-lan Zhen,Xiao-bo He,Li-jun Wang, and Kuo-chih Chou, Recovery and separation of Fe and Mn from simulated chlorinated vanadium slag by molten salt electrolysis, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2140-y
    [8] Lu-ming Chen,Yu-lan Zhen,Guo-hua Zhang,De-sheng Chen,Li-na Wang,Hong-xin Zhao,Fan-cheng Meng, and Tao Qi, Carbothermic reduction of vanadium titanomagnetite with the assistance of sodium carbonate, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2160-7
    [9] Bao-qiang Yu,Jue Kou,Chun-bao Sun, and Yi Xing, Extraction of copper from copper bearing biotite by ultrasonic-assisted leaching, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2132-y
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    [15] Jing Wen, Tao Jiang, Mi Zhou, Hui-yang Gao, Jia-yi Liu, and  Xiang-xin Xue, Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slag, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1598-3
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    [20] Xiao-yi Shen, Yuan-yong Liang, Hong-mei Shao, Yi Sun, Yan Liu, and  Yu-chun Zhai, Extraction and kinetic analysis of lead and strontium from leaching residue of zinc oxide ore, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-1972-9
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Microemulsion leaching of vanadium from sodium roasted vanadium slag by fusion of leaching and extraction processes

  • Corresponding author:

    Hong-yi Li    E-mail: hongyi.li@cqu.edu.cn

  • 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
  • 2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China

Abstract: In this work, the fusion of leaching and purification steps is realized by directly using microemulsion as the leaching agent. The DEHPA/n-heptane/NaOH microemulsion system has been established to directly leach vanadates from sodium roasted vanadium slag. The effect of leaching arguments on the leaching efficiency is investigated, including the molar ratio of H2O/NaDEHP (W), the DEHPA concentration of, solid/liquid ratio, stirring time, and leaching temperature. In optimal situations, the vanadium leaching efficiency could attain 79.57%. Both the XRD characterization of the leaching residue and the Raman spectrum of the microemulsion before and after leaching demonstrate the successful entrance of vanadates from sodium roasted vanadium slag into the microemulsion. The proposed method has realized the leaching and purification of vanadates in one step, which significantly reduces the production cost and environmental pollution. It affords new ways of thinking about the greener recovery of valuable metals from solid resources.

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