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Mechanical activation of the 2:1 layer lattice aluminosilicate pyrophyllite is investigated, with particular regard to the implications of this process for gold preg-robbing behaviour. Short-term grinding in a high energy laboratory ring mill increases the adsorption of gold by pyrophyllite in an acidic chloride medium, which would be problematic in the operation of a hydrometallurgical process. However,...
The ability of albite, an aluminosilicate mineral typical of those present in many gold ores, to adsorb gold is examined at varied pH levels in chloride media. The adsorption of gold on albite is intimately associated with the leaching behaviour of albite in acidic solutions. The preferential leaching of Na and Al from albite leads to the formation of an altered silica-rich surface layer as the gold...
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