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Recovery of Gold from Electronic Scrap by Hydrometallurgical Process
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  • Recovery of Gold from Electronic Scrap by Hydrometallurgical Process
  • Recovery of Gold from Electronic Scrap by Hydrometallurgical Process
저자명
Lee. Churl-Kyoung,Rhee. Kang-In,Sohn. Hun-Joon
간행물명
資源리싸이클링 : 한국자원리싸이클링학회지
권/호정보
1997년|6권 3호|pp.36-40 (5 pages)
발행정보
한국자원리싸이클링학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

A series of processes has been developed to recover the gold from electronic scrap containing about 200~600 ppm Au. First, mechanical beneficiation including shredding, crushing and screening was employed. Results showed that 99 percent of gold component leaves in the fraction of under 1mm of crushed scrap and its concentration was enriched to about 800 ppm without incineration. The crushed scrap was leached in 50% aqua regia solution and gold was completely dissolved at $60^{circ}C$ withing 2 hours. Other valuable metals such as silver, copper, nickel and iron were also dissolved. The resulting solution was boiled to remove nitrous compounds in the leachate. Finally, a newly designed electrolyzer was tested to recover the gold metal. More than 99% of gold and silver were recovered within an hour by electrowinning process.