Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions

Sokić, Miroslav; Stojanović, Jovica; Marković, Branislav; Kamberović, Željko; Gajić, Nataša; Radosavljević-Mihajlović, Ana; Milojkov, Dušan V.

doi:10.3103/s1067821222050091

Cited by 2 publications

(3 citation statements)

References 42 publications

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“…The activation energy value was ~39 kJ/mol. Based on the abovementioned facts, it was concluded that the chalcopyrite dissolution reaction was The relationship between the reaction rate constant and temperature can be described by the Arrhenius law shown by Equation (10):…”

Section: Effect Of Temperaturementioning

confidence: 99%

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The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution

Petrović,

Bogdanović,

Antonijević

et al. 2023

Metals

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Research on chalcopyrite leaching represents a great challenge, given its importance as one of the most abundant copper minerals and its significant role in global copper extraction. This study aimed to evaluate the effects of different parameters on chalcopyrite leaching by hydrogen peroxide as a strong oxidizing reagent in sulfuric acid solution. A series of leaching tests were carried out to investigate the effect of the solid/liquid ratio, stirring speed, temperature, oxidant and acid concentrations, and lixiviant dosing method on copper extraction from chalcopyrite concentrate. The catalytic decomposition of hydrogen peroxide occurred in the investigated leaching system, as reflected in the obtained metal extraction values. Copper extraction was increased in the first 60 min of the reaction, after which it essentially ceased. The maximum final copper extraction of 64.5% was attained with 3.0 mol/L H2O2 in 3.0 mol/L H2SO4 at a temperature of 40 °C after 120 min of reaction. Due to the catalytic decomposition of hydrogen peroxide in the examined leaching system, the leaching experiment was performed with the periodic addition of lixiviant at specific time intervals as well. The dissolution process was described by the first-order kinetics equation with an apparent activation energy of ~39 kJ/mol. Finally, XRD and SEM-EDS analyses were used to characterize the leached residue, and the results showed that the formation of elemental sulfur on the chalcopyrite surface affected the dissolution process.

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Section: Effect Of Temperaturementioning

confidence: 99%

“…Chalcopyrite, as one of the most widely found copper minerals in nature, exhibits slow dissolution kinetics due to surface passivation phenomena [10][11][12]. Specifically, the passivation layer covering the chalcopyrite mineral surface during leaching prevents further dissolution of this mineral.…”

Section: Introductionmentioning

confidence: 99%

The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution

Petrović,

Bogdanović,

Antonijević

et al. 2023

Metals

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“…They are commonly separated from each other by flotation methods. However, sphalerite can occasionally occur in a dispersed form alongside other sulfide minerals and tailings, presenting a complex mineralogical composition and fine-grained structure in the form of impregnations, inclusions, and both simple and complex intergrowths (Sokić et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Sphalerite Leaching in Acid Media: a Review

Sokić,

Bugarčić,

Jovanović

2023

Metall Mater Data

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The reserves of rich ores, from which the production of zinc by the existing conventional roasting-leaching-electrowinning process is technologically possible and economically justified, are decreasing year by year. For this reason, increasing attention has been directed towards researching the possibility of obtaining zinc from complex polymetallic ores with a low metal content, adhering to sustainable development goals following strict environmental regulations. Leaching procedures are commonly utilized for the processing of such mineral raw materials.As sphalerite is the widespread and most significant mineral of zinc sulfide, a large part of the research focuses on studying the behavior of sphalerite in the leaching process. This paper reviews the existing knowledge about the leaching of sphalerite in acidic solutions as well as the phenomena accompanying the dissolution process. Special attention is given to research related to the kinetics and mechanism of sphalerite oxidation in an acidic medium influenced by various oxidants, such as hydrogen peroxide, oxygen, dichromate ions, nitrate and nitrite ions, ferric and cupric ions, and others. All these results enable the development of new technological procedures to produce zinc from low-grade and complex ores while meeting increasingly rigorous environmental requirements.

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Modification of Structural-Textural Properties of Sulfide Minerals at Polymetallic Concentrate Leaching with Sulfuric Acid and Hydrogen Peroxide Solutions

Cited by 2 publications

References 42 publications

The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution

The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution

Sphalerite Leaching in Acid Media: a Review

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