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Comparison of Ultrasound-Assisted and Regular Leaching of Vanadium and Chromium from Roasted High Chromium Vanadium Slag

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Abstract

Ultrasound-assisted leaching (UAL) was used for vanadium and chromium leaching from roasted material obtained by the calcification roasting of high-chromium–vanadium slag. UAL was compared with regular leaching. The effect of the leaching time and temperature, acid concentration, and liquid–solid ratio on the vanadium and chromium leaching behaviors was investigated. The UAL mechanism was determined from particle-size-distribution and microstructure analyses. UAL decreased the reaction time and leaching temperature significantly. Furthermore, 96.67% vanadium and less than 1% chromium were leached at 60°C for 60 min with 20% H2SO4 at a liquid–solid ratio of 8, which was higher than the maximum vanadium leaching rate of 90.89% obtained using regular leaching at 80°C for 120 min. Ultrasonic waves broke and dispersed the solid sample because of ultrasonic cavitation, which increased the contact area of the roasted sample and the leaching medium, the solid–liquid mass transfer, and the vanadium leaching rate.

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Acknowledgements

This research was financially supported by the Programs of the National Natural Science Foundation of China (Nos. 51574082 and 51374052), the Fundamental Funds for the central universities (No. 150202001) and the National Natural Science Foundation of China and Yunnan Provincial Government (No. U15022273).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Jing Wen, Tao Jiang, Huiyang Gao, Yajing Liu, Xiaole Zheng & Xiangxin Xue

  2. Key Laboratory for Recycling Science of Metallurgical Resources, Shenyang, 110819, Liaoning, China

    Tao Jiang & Xiangxin Xue

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  1. Jing Wen
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  2. Tao Jiang
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  3. Huiyang Gao
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  4. Yajing Liu
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  5. Xiaole Zheng
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  6. Xiangxin Xue
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Correspondence to Tao Jiang.

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Wen, J., Jiang, T., Gao, H. et al. Comparison of Ultrasound-Assisted and Regular Leaching of Vanadium and Chromium from Roasted High Chromium Vanadium Slag. JOM 70, 155–160 (2018). https://doi.org/10.1007/s11837-017-2662-6

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  • DOI: https://doi.org/10.1007/s11837-017-2662-6

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