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Recovery of Indium from Waste Liquid Crystal Display Screen by Reduction Roasting Under H2-H2O Atmosphere

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Rare Metal Technology 2024 (TMS 2024)

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

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Abstract

Indium is a strategic critical metal in manufacturing indium-tin oxide (ITO) thin films for LCD/LED screens. Nevertheless, indium in Earth’s crust is a rare dispersion with an average abundance of 0.02 ppm, which is difficult to recover from primary ore. Hence, scholars focused on Indium recovery from waste LCD screens using hydrometallurgy technologies, which were always with long process. In this paper, a novel process for the separation and recovery of indium from waste LCD by roasting under an H2-H2O atmosphere is proposed. Under optimal conditions, In2O3 can be reduced selectively to gaseous In2O, and then In2O can be recovered efficiently. The effects of roasting parameters on indium recovery were studied utilizing thermodynamic analysis, XRD, and ICP. The results showed that the indium in waste LCD can be reduced to In2O(g) under the H2-H2O atmosphere at 1100–1200 ℃, the recovery of indium was up to 96.53% with an enrichment ratio of 3700.

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Acknowledgements

The authors recognize the independent exploration and innovation project for graduate students at Central South University (Number 2023ZZTS0787).

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Zijian Su, Xiaoning Hu, Qijie Guo & Yuanbo Zhang

Authors
  1. Zijian Su
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  2. Xiaoning Hu
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  3. Qijie Guo
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  4. Yuanbo Zhang
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Corresponding author

Correspondence to Yuanbo Zhang .

Editor information

Editors and Affiliations

  1. KTH Royal Institute of Technology, Stockholm, Sweden

    Kerstin Forsberg

  2. University of Tokyo, Tokyo, Japan

    Takanari Ouchi

  3. University of Toronto, Toronto, ON, Canada

    Gisele Azimi

  4. University of Saskatchewan, Saskatoon, SK, Canada

    Shafiq Alam

  5. IND LLC, South Jordan, UT, USA

    Neale R. Neelameggham

  6. University of Ilorin, Ilorin, Nigeria

    Alafara Abdullahi Baba

  7. University of Queensland, Brisbane, QLD, Australia

    Hong Peng

  8. Pennsylvania State University, University Park, PA, USA

    Athanasios Karamalidis

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Su, Z., Hu, X., Guo, Q., Zhang, Y. (2024). Recovery of Indium from Waste Liquid Crystal Display Screen by Reduction Roasting Under H2-H2O Atmosphere. In: Forsberg, K., et al. Rare Metal Technology 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50236-1_3

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