extracting gold from the earth39s crust


Gold Extraction / Mining Gold.info

Even though the precious metal gold only occurs very rarely indeed, it can be found almost everywhere on the planet in the 16 kilometre thick Earth's crust.

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Extracting Gold HowStuffWorks

Removing the gold-bearing rock from the ground is just the first step. To isolate pure gold, mining companies use a complex extraction process. The first step in

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BBC - GCSE Bitesize: Methods of extracting metals

The Earth's crust contains metals and metal compounds such as gold, iron oxide To become useful, the metals have to be extracted from whatever they are

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Gold extraction

Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing,

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'Green' gold extraction method replaces cyanide with starch WIRED

May 20, 2013 Chemistry postgraduate student Zhichang Liu has discovered -- by accident -- a new method of extracting gold, using (of all things) corn starch

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