http://en.wikipedia.org/wiki/Gold_extractionUsually related to...

  1. quinn123
    249 Posts.
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    20/08/12
    20:36
    Post #: 10596120
    http://en.wikipedia.org/wiki/Gold_extraction

    Usually related to nasty primary sulphide ores. An especially bad one is arsenopyrite. This can cause recovery by conventional methods to be as low as 10%! Kills projects quite nicely. There would be a wide variety of ore forming processors which could cause refractory ore to be deposited.

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