대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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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.)
- 발행 : 2001.10.01
초록
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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