Method for enriching precious metals from printed circuit board incineration ash from molten pool by circulating chlorination

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United States of America Patent

PATENT NO 11447845
APP PUB NO 20210324496A1
SERIAL NO

16342531

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge.

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Patent Owner(s)

Patent OwnerAddress
BEIJING UNIVERSITY OF TECHNOLOGYPINGLEYUAN #100 CHAOYANG DISTRICT BEIJING 100124

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Bin Beijing, CN 1200 10531
Pan, Dean Beijing, CN 15 1
Wu, Yufeng Beijing, CN 35 54

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