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Open AccessArticle

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Institute for Technology of Nuclear and Other Mineral Raw Materials, 11000 Belgrade, Serbia
Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia
Technical Faculty, University of Belgrade, 19210 Bor, Serbia
Author to whom correspondence should be addressed.
Metals 2019, 9(11), 1173;
Received: 4 September 2019 / Revised: 21 October 2019 / Accepted: 26 October 2019 / Published: 30 October 2019
(This article belongs to the Special Issue Advances in Mineral Processing and Hydrometallurgy)
In ores, chalcopyrite is usually associated with other sulfide minerals, such as sphalerite, galena, and pyrite, in a dispersed form, with complex mineralogical structures. Concentrates obtained by flotation of such ores are unsuitable for pyrometallurgical processing owing to their poor quality and low metal recovery. This paper presents the leaching of chalcopyrite concentrate from the location “Rudnik, Serbia”. The samples from the flotation plant were treated with hydrogen peroxide in sulfuric acid. The influences of temperature, particle size, stirring speed, as well as the concentrations of hydrogen peroxide and sulfuric acid were followed and discussed. Hence, the main objective was to optimize the relevant conditions and to determine the reaction kinetics. It was remarked that the increase in temperature, hydrogen peroxide content, and sulfuric acid concentration, as well as the decrease in particle size and stirring speed, contribute to the dissolution of chalcopyrite. The dissolution kinetics follow a model controlled by diffusion, and the lixiviant diffusion controls the rate of reaction through the sulfur layer. Finally, the main characterization methods used to corroborate the obtained results were X-ray diffraction (XRD) as well as qualitative and quantitative light microscopy of the chalcopyrite concentrate samples and the leach residue. View Full-Text
Keywords: chalcopyrite concentrate; hydrogen peroxide; sulfuric acid; leaching kinetics chalcopyrite concentrate; hydrogen peroxide; sulfuric acid; leaching kinetics
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MDPI and ACS Style

Sokić, M.; Marković, B.; Stanković, S.; Kamberović, Ž.; Štrbac, N.; Manojlović, V.; Petronijević, N. Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid. Metals 2019, 9, 1173.

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