An integrated and sustainable hydrometallurgical process for enrichment of precious metals and selective separation of copper, zinc, and lead from a roasted sand

doi:10.1016/j.wasman.2021.07.020

GIEC OpenIR

	An integrated and sustainable hydrometallurgical process for enrichment of precious metals and selective separation of copper, zinc, and lead from a roasted sand
	Liu, Gongqi 1; Pan, De'an 1; Wu, Yufeng 1; Yuan, Haoran2 ; Yu, Lu 1; Wang, Wei 1
	2021-08-01
发表期刊	WASTE MANAGEMENT
ISSN	0956-053X
卷号	132 页码:133-141
通讯作者	Pan, De'an(pandean@bjut.edu.cn) ; Wu, Yufeng(wuyufeng3r@126.com)
摘要	This study developed an efficient and sustainable hydrometallurgical process for the enrichment of gold and silver and the stepwise separation of copper, zinc, and lead from sulfated roasted sand of waste printed circuit board smelting ash. Selective separation of copper and zinc was achieved by water leaching, and silver dispersion was reduced by controlling the amount of NaCl added during the leaching process. The results of the water leaching showed that the copper and zinc leaching rates were 99.85% and 99.47%, respectively, whereas the loss rate of silver was 2.1% with optimal leaching parameters. The high-chloride-complex method was used to study the efficient conversion and separation of lead from the leached residue, and the leaching kinetics and conversion mechanism of lead were discussed. The results showed that under the optimal conditions, the leaching rate of lead was 99.79%. Leaching kinetics analysis showed that lead leaching in the high - chlorine system was controlled by a chemical reaction; the apparent activation energy was 53.63 kJ/mol. After the leaching of copper, zinc, and lead, 1.66% Ag and 213 g/t Au were enriched in the leached residue; and the precious metal enrichment goal was reached. The chlorinated leachate showed good recycling performance, and a lead leaching rate of 97.93% was obtained after three circulations. After cooling, crystallization, and purification, lead chloride with a purity of 99.89% and high economic and industrial value was obtained from the lead-rich leachate. This process has favorable and sustainable industrial application prospects.
关键词	Roasted sand Recycle valuable elements Hydrometallurgical process Water leaching High-chloride leaching
DOI	10.1016/j.wasman.2021.07.020
关键词[WOS]	ACID-BATTERY ; LEACHING PROCESS ; RECOVER LEAD ; CHLORIDE ; PASTE ; KINETICS ; SILVER
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFC1903104] ; National Key Research and Development Program of China[2018YFC1903603]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
项目资助者	National Key Research and Development Program of China
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000685361000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/33655
专题	中国科学院广州能源研究所
通讯作者	Pan, De'an; Wu, Yufeng
作者单位	1.Beijing Univ Technol, Inst Circular Econ, Beijing 100124, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Liu, Gongqi,Pan, De'an,Wu, Yufeng,et al. An integrated and sustainable hydrometallurgical process for enrichment of precious metals and selective separation of copper, zinc, and lead from a roasted sand[J]. WASTE MANAGEMENT,2021,132:133-141.
APA	Liu, Gongqi,Pan, De'an,Wu, Yufeng,Yuan, Haoran,Yu, Lu,&Wang, Wei.(2021).An integrated and sustainable hydrometallurgical process for enrichment of precious metals and selective separation of copper, zinc, and lead from a roasted sand.WASTE MANAGEMENT,132,133-141.
MLA	Liu, Gongqi,et al."An integrated and sustainable hydrometallurgical process for enrichment of precious metals and selective separation of copper, zinc, and lead from a roasted sand".WASTE MANAGEMENT 132(2021):133-141.