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high grade small scale gold dust extraction equipment manufacture

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high grade small scale gold dust extraction equipment manufacture

Jan 01, 2012· Oh et al. (2003) reportedhigh gold(95%) and silver (100%) recoveries from printed circuit boards by thiosulfate leaching. In a similar study, Ha et al. (2010) found rapidextractionofgold(i.e. 98% in 2 h) from scrap in a lixiviant solution containing 20 mM copper, 0.12 M thiosulfate and 0.2 M ammonia. However, they observed discernibly ...

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