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Erschienen in:

2024 | OriginalPaper | Buchkapitel

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

verfasst von : Zijian Su, Xiaoning Hu, Qijie Guo, Yuanbo Zhang

Erschienen in: Rare Metal Technology 2024

Verlag: Springer Nature Switzerland

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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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Vorheriges Kapitel Novel Process for Tin Recovery from Waste Print Circuit Boards (WPCBs) by Selective Oxidation Roasting Under H2O Atmosphere

Nächstes Kapitel Development and Assessment of Different Hydrometallurgical Processes for Sustainable Recovery of Rare Earths from Spent NdFeB Magnets

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Titel: Recovery of Indium from Waste Liquid Crystal Display Screen by Reduction Roasting Under H2-H2O Atmosphere
verfasst von: Zijian Su
Xiaoning Hu
Qijie Guo
Yuanbo Zhang
Verlag: Springer Nature Switzerland
Buch: Rare Metal Technology 2024
Print ISBN: 978-3-031-50235-4

Electronic ISBN: 978-3-031-50236-1

Copyright-Jahr: 2024
DOI: https://doi.org/10.1007/978-3-031-50236-1_3

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