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gold cyanidation redox in sudan

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  • Cyanide IPFS

    Cyanide is mainly produced for the mining of gold and silver: It helps dissolve these metals and their ores.In the cyanide process, finely ground high-grade ore is mixed with the cyanide (concentration of about two kilogram NaCN per tonne); low-grade ores are stacked into heaps and sprayed with a cyanide solution (concentration of about one ...

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  • Sudans Northern State govt. to close gold cyanidation ...

    Cyanidation is a technique for extracting gold from low-grade ore. It is the most commonly used process for gold extraction. Because of the highly toxic nature of cyanide however, the process is controversial, and its usage banned in a number of countries.

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  • Gold cyanidation Wikipedia

    Despite being used in 90% of gold production: gold cyanidation is controversial due to the toxic nature of cyanide. Although aqueous solutions of cyanide degrade rapidly in sunlight, the less-toxic products, such as cyanates and thiocyanates, may persist for some years.

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