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Preparation of Matte with Pyrite and Chalcopyrite as sulfur source and Leaching behaviour  

Park, Kyung-Ho (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Nam, Chul-Woo (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Chang, Jong-Sin (Production & Technology Team, LS-Nikko Coper Inc.)
Ahan, Sung-Chen (Production & Technology Team, LS-Nikko Coper Inc.)
Kim, Hong-In (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Publication Information
Resources Recycling / v.17, no.1, 2008 , pp. 51-58 More about this Journal
Abstract
Artificial mattes were prepared with adding pyrite or chalcopyrite as sulfur sources with Cu-Ni-Co-Fe alloy. The major phases identified by X-ray diffraction pattern were $(FeSi)_9S_8$, $CuFeS_2$, FeS, $Co_4S_3$, $Ni_3S_2$ and $Cu_2S$ for both mattes, and the matte prepared by adding chalcopyrite showed the higher peak of $Cu_2S$ due to high content of copper. Under optimum conditions, more than 95% copper, 90% nickel and 90% cobalt were extracted into leaching solution and sulfur concentration in the mattes did not much affect the leaching efficiency of the metals. The increase of the amount of pyrite or chalcopyrite added decreased pH in leaching solution and increased the concentration of iron ion dissolved in the leaching solution and the amount of residue.
Keywords
Matte; Alloy; Sulfur; Pyrite; Chalcopyrite; Leaching;
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