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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 This is typical of lowgrade

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PDF Cyanidation of Refractory Gold Ores A Review

The degree of refractoriness has been classified based on the proportion of gold recovered Table 1 Marsden and House 2009 The gold in refractory sulfide gold ores is surrounded by sulfide

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The process mineralogy of gold The classification of ore

 · The main causes of refractory gold ores are submicroscopic gold the Au Ag tellurides and very fine grained gold