科研之友
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摘要
Due to the rapid technological progress, the replacement of electronic equipment is very often necessary, leading to huge amounts that end up as waste. In addition, waste electrical and electronic equipment (WEEE) contains metals of high commercial value and others that are supposed to be hazardous for the environment. Consequently, WEEE could be considered as a significant source for recovery of non-ferrous metals. Among these waste, computers appear to be distinctive, as far as further exploitation is concerned. The most "useful" parts of the computers are the printed circuit boards (PCBs) that contain many metals of interest. In the present study printed circuit boards (PCBs) were cut and treated thermally. The obtained material was dissolved in different acid media, in order to extract copper. Electrodeposition technique was applied in order to recover copper in powder form. More than 97% of copper was recovered achieved by application of high current density resulting to dendritic structure of copper. The applied process was characterised by a high current efficiency and led to the production of copper powder of 80 mu m mean diameter appropriate for powder metallurgy applications.
- 出版日期2010
