Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/7112
Title: Kinetics of chalcopyrite leaching by hydrogen peroxide in sulfuric acid
Authors: Sokić, Miroslav
Marković, Branislav
Stanković, Srđan 
Kamberović, Željko
Štrbac, Nada
Manojlović, Vaso
Petronijević, Nela
Keywords: Chalcopyrite concentrate;Hydrogen peroxide;Leaching kinetics;Sulfuric acid
Issue Date: 1-Nov-2019
Rank: M21
Publisher: MPDI
Journal: Metals
Volume: 9
Issue: 11
Start page: 1173
Abstract: 
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.
URI: https://biore.bio.bg.ac.rs/handle/123456789/7112
ISSN: 2075-4701
DOI: 10.3390/met9111173
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