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http://dx.doi.org/10.7844/kirr.2018.27.3.3

Leaching of Metal Sulfides and the Stability of Reaction Intermediates  

Lee, Man Seung (Department of Advanced Material Science & Engineering, Institute of Rare Metal, Mokpo National University)
Choi, Seung Hoon (Department of Chemical and Biomolecular Engineering, Seonam University)
Publication Information
Resources Recycling / v.27, no.3, 2018 , pp. 3-7 More about this Journal
Abstract
Development of extractive metallurgical processes for metal sulfides has become of importance owing to the depletion of oxide ores with rich metal contents. Most of the leaching reactions of metal sulfides is electrochemical reaction and can be classified as $H_2S$, S, and ${SO_4}^{2-}$ evolution type. The acidity of leaching solution and the presence and concentration of an oxidizing agent affect the formation of reaction intermediates containing sulfur. Frost diagram of sulfuroxoanion indicates that the oxoanions with higher oxidation number are more thermodynamically stable in the presence of oxidizing agents.
Keywords
Metal sulfide; leaching; Frost diagram;
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