Complete non-cyanogens wet process for green recycling of waste printed circuit board

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United States of America Patent

PATENT NO 9689055
APP PUB NO 20120318681A1
SERIAL NO

13598177

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Abstract

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The invention related to the recycling field of waste printed circuit boards (WPCB), and especially involved a complete non-cyanogens wet process for green recycling of WPCB, which belonged to the field of recycle economy. In the invention, the process included that WPCB were broken by the jaw crusher, and then mixed copper powders and nonmetallic powders were separated by the method of air classification, the mixed copper powders were smelted and casted to get copper anode plates, the copper was purified by electrolytion, the valuable metals (such as copper, gold, silver, platinum and palladium, lead and tin) were recycled from the copper anode slime, and the waste water was recycled. The recovery ratio of all-metal was above 98%. The purity of the cathode copper was up to 4N level. The ratio of de-coppering was above 96%. The recovery ratio of gold was above 98.

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Patent Owner(s)

Patent OwnerAddress
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING100083 NO 30 HAIDIAN DISTRICT BEIJING XUEYUAN ROAD BEIJING CITY BEIJING CITY 100083

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Bin Beijing, CN 1200 10531
Liu, Bo Beijing, CN 672 3701
Pan, Dean Beijing, CN 15 1
Tian, Jianjun Beijing, CN 5 0
Zhang, Shengen Beijing, CN 10 6

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