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During extraction and refining, the valuable metals are separated from the worthless materials by a series of physical and chemical operations.
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Wohlwill process is a process that is used to refine gold to the highest degree of purity (99.999%) with a process of industrial scale chemical procedures.
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Gold Extraction Processes: An Overview – Yahoo! Voices – …
In this article the author provides an overview of the most important gold extraction processes used over the centuries. Some detail about the principles of the …
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Posted at: April 17, 2013 [ 4.9 - 5822 Ratings ]
Gold Extraction Processes: An Overview – Yahoo! Voices – … In this article the author provides an overview of the…