Metal Recovery from Printed Circuit Boards Using CRT Glass by Reduction Melting
Valuable metals in printed circuit boards (PCB) can be recovered with precipitated lead during reduction melting of cathode ray tube (CRT) glass with PCB. Molten lead is obtained from the CRT lead glass by reduction melting, and the lead has the property of collecting coexisting metals. From the results of melting experiments using actual waste of CRT glass and PCB, 100% of Cu and Ni, 81% of Ag, and 73% of Au were recovered from the added PCB. This process can treat CRT glass and PCB together and simultaneously recover metal resources. Recovery of metals is possible in small plants at locations far from copper smelters.
KeywordsUrban mine CRT glass Metal recovery Precious metal Reduction melting
This research was supported by a grant from the Environmental Research and Technology Development Fund (ERTDF, No. 3K-123019) of the Ministry of the Environment, Japan. The authors would also like to thank Kouichi Sakakibara for the assistance with the experimental work.
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