Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2001.10a
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- Pages.193-197
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- 2001
Selective leaching of valuable metals (Au, Ag etc.) from waste printed circuit boards (PCB)
- Oh, Chi-Jung (Dept. of Resources and Energy Eng., Chonnam National Univ.) ;
- Lee, Sung-Oh (Chem. Eng. & Ind. Chem., UNSW) ;
- Song, Jin-Kon (Chem. Eng. & Ind. Chem., UNSW) ;
- Kook, Nam-Pyo (Civil & Environmental Engineering, Halryo University) ;
- Kim, Myong-Jun (Dept. of Resources and Energy Eng., Chonnam National Univ.)
- Published : 2001.10.01
Abstract
This study was carried out to recover gold, silver and other valuable metals from the printed circuit boards (PCB) of waste computers. PCB samples were crushed to under 1mm by a shredder and initially separated into 30% conducting and 70% non-conducting materials by an electrostatic separator. The conducting materials, which contained the valuable metals, were then used as the feed material for magnetic separation where it was found that 42% was magnetic and 58% non- magnetic. The non-magnetic materials contained 0.227mg/g Au and 0.697mg/g Ag. Further leaching of the non-magnetic component using 2.0M sulfuric acid and 0.2M hydrogen peroxide at 85
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