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The growing use of electronicExtraction devices has intensified the challenge of managing electronic waste (e-wasteE-waste) while depleting critical resources such as indiumIndium (In) and tinTin (Sn). These strategic metalsMetal, primarily used as indiumIndium tinTin oxide (ITO) in flat-panel displays, are scarce and essential for high-tech industries. Typical analysis indicates that liquid crystal display (LCDLCD) panels contain 0.01–0.02% In & 0.04–0.08% Sn. Apart from In and Sn the impurities are 0.05–0.08% Al and 1.95–2.31% Fe. The methodology involves safe dismantling, mechanical shredding for size reduction, and subsequent hydrometallurgical extractionExtraction. IndiumIndium leachingLeaching was optimized using dilute H₂SO₄ at elevated temperature with a suitable pulp density, achieving ~ 98% recovery. This study presents a sustainable, scalable process for recovering In and Sn from discarded LCDLCD panels which will reduce e-wasteE-waste impact and promote circular economy by reintroducing critical metalsMetal into the production loop, thereby reducing dependency on primary resources and enhancing sustainabilitySustainability.

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Hydrometallurgical Extraction of Rare and Critical Metals (In and Sn) from Discarded Display Devices

  • 会议论文

  • 发表日期：

    2026年

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  • Karina Rani,
  • Rekha Panda,
  • Ankur Sharma,
  • Apurva Aditi,
  • Balram Ambade,
  • Manis Kumar Jha

摘要

The growing use of electronicExtraction devices has intensified the challenge of managing electronic waste (e-wasteE-waste) while depleting critical resources such as indiumIndium (In) and tinTin (Sn). These strategic metalsMetal, primarily used as indiumIndium tinTin oxide (ITO) in flat-panel displays, are scarce and essential for high-tech industries. Typical analysis indicates that liquid crystal display (LCDLCD) panels contain 0.01–0.02% In & 0.04–0.08% Sn. Apart from In and Sn the impurities are 0.05–0.08% Al and 1.95–2.31% Fe. The methodology involves safe dismantling, mechanical shredding for size reduction, and subsequent hydrometallurgical extractionExtraction. IndiumIndium leachingLeaching was optimized using dilute H₂SO₄ at elevated temperature with a suitable pulp density, achieving ~ 98% recovery. This study presents a sustainable, scalable process for recovering In and Sn from discarded LCDLCD panels which will reduce e-wasteE-waste impact and promote circular economy by reintroducing critical metalsMetal into the production loop, thereby reducing dependency on primary resources and enhancing sustainabilitySustainability.