Abstract
The processes occurring during autoclave oxidative leaching of refractory sulfide gold ores concentrates are discussed, as a result of which difficult-to-remove deposits (sediments) are formed on all internal surfaces of autoclaves, reducing equipment performance. It is shown that the phase composition of the sediments varies across autoclave sections and that the main component of the sediments is potassium jarosite KFe3(SO4)2(OH)6. The mechanism of sediments formation is analyzed and possible ways to prevent appearance them are discussed.
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