About: Two doctors and a metallurgist from Scotland patented a process for dissolving gold with cyanide in 1887 and patented the recovery of gold from solution using finely divided zinc (zinc precipitation) the following year. […]The first commercial processing plant to use cyanide in the milling circuit was constructed at the Crown mine at Karangahake, New Zealand in 1889.       Sponge   NotDistinct   Permalink

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  • Two doctors and a metallurgist from Scotland patented a process for dissolving gold with cyanide in 1887 and patented the recovery of gold from solution using finely divided zinc (zinc precipitation) the following year. […]The first commercial processing plant to use cyanide in the milling circuit was constructed at the Crown mine at Karangahake, New Zealand in 1889. (en)
Bibliographic Citation
  • 1988 July, Michael A. Silva, “Cyanide Heap Leaching in California”, in California Geology‎[1], volume 41, number 7, page 147: (en)
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