Title of article :
Enhancing the kinetics of chalcopyrite leaching in the Galvanox™ process
Author/Authors :
Nazari، نويسنده , , G. and Dixon، نويسنده , , D.G. and Dreisinger، نويسنده , , D.B.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
8
From page :
251
To page :
258
Abstract :
Pyrite is an effective catalyst for the atmospheric leaching of chalcopyrite in iron sulfate media via the Galvanox™ process. However, not all pyrite samples have the same catalytic effect on the process. Techniques to enhance the catalytic properties of pyrite were investigated. Specifically, the effects of pyrite treated with silver (enhanced pyrite) on the kinetics of chalcopyrite leaching were examined with the aim of improving the Galvanox™ process. It has been shown that by pretreating natural pyrite samples with miniscule amounts of silver ions, the rate of chalcopyrite leaching increases dramatically. As little as 50 ppm silver on pyrite, or about 50 g silver (about 1.5 troy ounces) per tonne of pyrite, is sufficient to ensure rapid chalcopyrite leaching kinetics in the Galvanox™ process, regardless of the source of the pyrite. With this new process, the catalytic properties of pyrite are improved such that all pyrite samples accelerate the rate of copper extraction from chalcopyrite significantly.
Keywords :
Chalcopyrite , Atmospheric leaching , Pyrite , Kinetics , Galvanox™
Journal title :
HYDROMETALLURGY
Serial Year :
2011
Journal title :
HYDROMETALLURGY
Record number :
2372505
Link To Document :
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