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Recovery of metal values from waste printed circuit boards using analkali fusion–leaching–separation

来源:本站 发布时间:2016年08月29日 作者:

论文题目:Recovery of metal values from waste printed circuit boards using analkali fusionleachingseparation process

发表期刊:Hydrometallurgy2015,156:199-206.

作者:Xueyi Guo*, Jingxin Liu, Hong Qin, Yang Liu , Qinghua Tian, Dong Li

摘要:An efficient alkali fusionleachingseparation process is developed to recover metals in crushed metal enrichment (CME) which originated from waste printed circuit boards (PCBs). Impacts of fusion parameters on metals conversions were systematically investigated. In the fusionleaching process, amphoteric metals such as tin, lead,zinc and aluminum in the CME were leached out, while leaving copper and precious metals in the residue.Subsequently, metals in solution were further extracted via precipitation processes, and metals in the residue were recovered using an acid leachingelectrowinning process. Cathode copper, nano-Cu2O, CaSnO3/CaSn(OH)6 crystal and mixture of PbSZnSwere obtained as the final products of this process. By optimizing the experimental conditions, recoveries of 98.66% for Cu, 91.08% for Sn, 91.25% for Zn, 78.78% for Pbwere achieved, respectively.And all precious metals were enriched in the final residue with grades of Au 613 g/t, and Ag 2157 g/t.

关键词:Waste printed circuit boards, Alkali fusion process, Copper, Amphoteric metals

 

 

 

 

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