Next Article in Journal
The Peculiarities of Convective Heat Transfer in Melt of a Multiple-Electrode Arc Furnace
Previous Article in Journal
Microstructural Evolution from Dendrites to Core-Shell Equiaxed Grain Morphology for CoCrFeNiVx High-Entropy Alloys in Metallic Casting Mold
Previous Article in Special Issue
Viscoelasticity of Quartz and Kaolin Slurries in Seawater: Importance of Magnesium Precipitates
Open AccessArticle

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

1
Institute for Technology of Nuclear and Other Mineral Raw Materials, 11000 Belgrade, Serbia
2
Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia
3
Technical Faculty, University of Belgrade, 19210 Bor, Serbia
*
Author to whom correspondence should be addressed.
Metals 2019, 9(11), 1173; https://doi.org/10.3390/met9111173
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
Show Figures

Graphical abstract

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.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop