The|Coinologist.

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Gold Refining | The Miller Process

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Miller Process

  • The Miller industrial process refines scrap metal with an unknown but measurable content of gold into gold with a purity of 98 to 99 percent. The Miller process begins when scrap metal is melted into chunks small enough to put into crucibles, using a furnace and some form of granulator. Granulators make the gold chips look like corn flakes, with a high surface area, so that during the chemical process all gold is thoroughly treated. The gold flakes are put into a crucible, which is heated until the metal becomes molten, and then aerated with chlorine gas. The chlorine gas reacts with all metal that isn’t gold, so that the chlorides created can be separated from the gold, creating a fine product.

Written by Robert L. Wilson

October 19, 2011 at 7:19 am

One Response

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  1. this is a really cool and interesting process!

    Fiona.q

    October 20, 2011 at 8:50 pm


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