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Arsenic sulfides such as arsenopyrite have a negative effect in gold leaching. 5. Copper sulfides: ores that contain gold associated with copper sulfide minerals belong to this class. Chalcopyrite and chalcosite are the main copper minerals and they have a detrimental effect in gold leaching. 6.
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technology is not used to leach the gold but only to make the cyanide ions accessible to the gold in the host mineral. 2. Extraction of gold and silver from the argentopyrite / argentite ore 2.1 Pressure oxidation / cyanidation chemistry The oxidation of gold and silver is a prerequisite for its dissolution in the alkaline cyanide lixiviant.
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