Jun 24, 2009· gold dust refinery machinery for sale Cone Crusher|Cone Gold Refining Forum Handbook Vol 2 62409 Gold Refining Forum Handbook Vol 2 Read more. How to Refine Gold with Pictures wikiHow. How to Refine Gold You may want to make some extra money by refining your own gold at home or you may be a jeweler who wants .

Aug 29, 2008· Refining is done by dissolving the gold in aqua regia, and collecting it by electrical deposition. Gold melts at 1947°F, which is much hotter that your stove or an ordinary charcoal fire will go, so melting gold requires special furnaces, which can be quite pricey.

These bars are typically created at a mine site and contain variable gold content along with silver and require further refining to produce a gold bullion that can be certified at % Au minimum, that investors and processors typically purchase with confidence.

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Refining companies receive doré bars, as well as scrap gold, and reliquefy the metal in a furnace. Workers add borax and soda ash to the molten metal, which separates the pure gold from other precious and less precious metals.

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There are actually a few different methods of refining gold. Depending upon the quantity of gold you are working with and the desired level of purity, the two most common methods for refining gold are the use of high temperature flame and the use of chemicals to refine the gold.

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Jul 28, 2011· For this situation, the gold would have to be reduced to a fine gold dust, before being immersed in a hydrochloric acid solution only. As I understand it, all chlorides are soluble in water. After the reaction, the whole lot would be allowed to stand for some time, then the copper chloride solution decanted off, leaving a heavy gold sludge.

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Jewellery workers were said to slather their hair with that pomade so that they could run their hands, covered in precious metal dust, through it, later retrieving the gold or silver.