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1. Mining – open pit and underground. To define the ore from the waste rock, samples are taken and assayed. Assay results are used to mark out areas of ore and waste rock, which are mined separately.
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The two gold refining methods most commonly employed to derive pure gold are: the Miller process and the Wohlwill process. The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold.
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Gold extraction Wikipedia. Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.
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The ore processing, is flexible and can take multiple types of ores and ore conditions and most waste is separated on site and left while the precious metals and the fines are transported to the mill site.
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Mining gold from year to year is always an increase, in which the processing system became more developed, ranging from mining system that uses a simple system to a more modern processing system. Gold mining was first carried out in alluvial areas.
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Mineral processing . In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the process of separating commercially valuable minerals from their ores
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1. Mining – open pit and underground. To define the ore from the waste rock, samples are taken and assayed. Assay results are used to mark out areas of ore and waste rock, which are mined separately.
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