Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best I have heard of is around 50% recovery. The fine coating of a iron compound definitely appears to be a key component of the inability of cyanide to efficiently leach low grade pyritic ores.
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Recovery of gold from refractory ores requires a pretreatment to liberate the gold particles from the host mineral. In particular, in the case of stibnite (Sb2S3), the antimony (Sb) forms stable compounds with sodium cyanide (NaCN) during the cyanidation process; as a consequence, cyanide consumption increases.
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It almost always contains some arsenic, and may also contain traces of silver, iron, and sulfur. ... Antimony is a minor ore of the element antimony, ...
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chemistry. posted by clara Wednesday, March 31, 2010 at 5:50pm Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron.
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The concentrated ore is then roasted in the furnace in the presence of oxygen. During roasting sulphur, arsenic, antimony are converted into oxides and are removed.
A chloridizing roast is a roast which, beginning with oxidation, ends by leaving, as nearly as possible, all the silver in the form of chloride .
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Problems, About, Antimony, Mining: Stone Crushing,Ore Crushing,Sand Making,Grinding Mill,Micro Powder Mill, Mobile Crusher, . Antimony Mining Encyclopedia of Arkansas Antimony mining took place intermittently in Arkansas after the metal's discovery in 1873.
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