Abstract
Different metal recovery from unsorted e-waste by smelting was investigated. Metallic Pb (lead) can be recovered from cathode ray tube (CRT) glass containing PbO by reduction melting. During the reduction melting, molten Pb has the property of mixing with other metals, and basic experiments simultaneously recovering different metals in different kinds of e-waste were investigated. Reagents of major metal components contained in printed circuit boards (PCB) and liquid crystal display (LCD) panels were added to lead silicate glass. The mixture was melted in a reductive atmosphere, and the obtained glass and metal were analyzed. Better than 90 % of Au, Ag, Cu, and Ni were recovered together in metallic form, with the recovery rate of indium 60 %. Chemical thermodynamics calculations suggested that the recovered metals are more difficult to oxidize than CO. Further, the chemical thermodynamics calculations suggested that recovery of metals that were not tested would also be possible.
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Acknowledgments
This research was supported by a grant of The Environmental Research and Technology Development Fund (ERTDF, No. 3K-123019) from the Ministry of the Environment, Japan. The authors would also like to thank Ryo Awaji and Kozo Sugiyama for assistance of experimental work.
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Inano, H., Tomita, K., Tada, T., Hiroyoshi, N. (2017). Recovery of Metals from E-Waste Mediated by Molten CRT Lead Glass. In: Matsumoto, M., Masui, K., Fukushige, S., Kondoh, S. (eds) Sustainability Through Innovation in Product Life Cycle Design. EcoProduction. Springer, Singapore. https://doi.org/10.1007/978-981-10-0471-1_36
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DOI: https://doi.org/10.1007/978-981-10-0471-1_36
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