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Simple and Highly Effective Purification of Metallurgical-Grade Silicon Through Metal-Assisted Chemical Leaching

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Energy Technology 2019

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The present study proposed a simple and highly effective method for removal of impurities from large-sized particle metallurgical-grade silicon (MG-Si) powders based on metal-assisted chemical leaching (MACL). The various leaching approaches (MACL, HF + H2O2 leaching, HF leaching, HCl leaching) were investigated for leaching behaviors of the main impurities (Fe, Al, Ca, Ti, Ni, V, Mn, and Cu). The leaching results show that the order of impurities’ removal efficiency, from highest to lowest, is MACL > HF − H2O2 leaching > HF leaching > HCl leaching. After MACL, The numerous micro-scale “channels” introduced by MACL which are beneficial for the removal of impurities, especially for the non-dissolving metal impurities, such as copper , calcium, and aluminum. It should be noted that the small amount of Cu mainly come from residual Cu nanoparticle and can be removed by simple acid washing.

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Acknowledgements

Financial support of this work from the National Natural Science Foundation of China (Grant No. 51504117, 61764009), the Program for Innovative Research Team in University of Ministry of Education of China (No. IRT_17R48), Yunnan Youth Fund Project (2016FD037), Talent Development Program of KUST(KKSY201563032), Analysis and Testing Foundation of Kunming University of Science and Technology (2018P20173102002).

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Authors and Affiliations

  1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Fengshuo Xi, Shaoyuan Li, Wenhui Ma, Kuixian Wei, Jijun Wu, Keqiang Xie, Yun Lei, Zhengjie Chen, Jie Yu, Xiaohan Wan & Bo Qin

  2. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Fengshuo Xi, Shaoyuan Li, Wenhui Ma, Kuixian Wei, Jijun Wu, Keqiang Xie, Yun Lei, Zhengjie Chen, Jie Yu, Xiaohan Wan & Bo Qin

Authors
  1. Fengshuo Xi
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  2. Shaoyuan Li
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  3. Wenhui Ma
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  4. Kuixian Wei
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  5. Jijun Wu
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  6. Keqiang Xie
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  7. Yun Lei
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  8. Zhengjie Chen
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  9. Jie Yu
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  10. Xiaohan Wan
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  11. Bo Qin
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Corresponding author

Correspondence to Wenhui Ma .

Editor information

Editors and Affiliations

  1. Nucor Castrip Arkansas, Blytheville, AR, USA

    Tao Wang

  2. Royal Melbourne Institute of Technology, Melbourne, VIC, Australia

    Xiaobo Chen

  3. Idaho National Laboratory, Idaho Falls, ID, USA

    Donna Post Guillen

  4. University of Alaska Fairbanks, Fairbanks, AK, USA

    Lei Zhang

  5. Queensland University of Technology, Brisbane, QLD, Australia

    Ziqi Sun

  6. Northeastern University, Shenyamg, China

    Cong Wang

  7. Commonwealth Scientific and Industrial Research Organization, Clayton South, VIC, Australia

    Nawshad Haque

  8. Purdue University, West Lafayette, IN, USA

    John A. Howarter

  9. IND LLC, South Jordan, UT, USA

    Neale R Neelameggham

  10. Al-Isra University, Amman, Jordan

    Shadia Ikhmayies

  11. University of Utah, Salt Lake City, UT, USA

    York R. Smith

  12. University of British Columbia, Vancouver, BC, Canada

    Leili Tafaghodi

  13. LG Fuel Cell Systems, North Canton, OH, USA

    Amit Pandey

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Xi, F. et al. (2019). Simple and Highly Effective Purification of Metallurgical-Grade Silicon Through Metal-Assisted Chemical Leaching. In: Wang, T., et al. Energy Technology 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-06209-5_22

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