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production process of crushed gold in united kingdom

Apr 16, 2019·Cyanideprocess.Cyanideextraction of gold may be used in areas where fine gold-bearing rocks are found. Sodiumcyanidesolution is mixed with finely ground rock that has been proven to contain gold or silver and is then separated as agold cyanideor silvercyanidesolution from ground rock. To precipitate residual zinc and silver and gold metals, zinc is added.

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