Enhancing the Leaching of Chalcopyrite Using Acidithiobacillus ferrooxidans under the Induction of Surfactant Triton X-100

Zhang, Ruiyang; Sun, Chunbao; Kou, Jue; Zhao, Hongyu; Wei, Dezhou; Xing, Yi

doi:10.3390/min9010011

Cited by 25 publications

(9 citation statements)

References 54 publications

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“…Therefore, it is convenient to treat these ores using some of the hydrometallurgical processes. Leaching of copper from chalcopyrite requires the presence of the oxidants in an acidic environment; some of the frequently present oxidants are: the ferric ions [3][4][5][6][7][8][9], the cupric ions [10][11][12], some acidophilic bacteria [13][14][15][16][17][18], the nitrate ions [19,20], the nitrite ions [21,22], the dichromate ions [23,24], the manganese ions [25,26], the permanganate ions [27], the chlorate ions [28], the oxygen ions [29][30][31][32][33][34], ozone [35], the silver ions [36,37], and the use of microwaves [38,39].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Sokić

Marković

Stanković

et al. 2019

Metals

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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.

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Section: Introductionmentioning

confidence: 99%

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Sokić

Marković

Stanković

et al. 2019

Metals

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“…This does not rule out that at 25 and 50 • C, the presence of elemental sulphur cannot exist; the presence would be so low that it would be difficult to detect. The presence of elemental sulphur is normal in leaching residues, mainly due to the chalcopyrite dissolution, even for processes such as bioleaching [35,36]. Leaching tests at 90 • C reported a composition identical to the tests at 70 • C. The presence of other species that are responsible for the passivation of chalcopyrite, such as natrojarosite or copper polysulfides, were not identified.…”

Section: Characterization Of Leaching Residuesmentioning

confidence: 92%

Pretreatment to Leaching for a Primary Copper Sulphide Ore in Chloride Media

Quezada

Roca

Benavente

et al. 2021

Metals

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The dissolution of copper sulphide ores continues to be a challenge for the copper industry. Several media and leaching alternatives have been proposed to improve the dissolution of these minerals, especially for the leaching of chalcopyrite. Among the alternatives, pretreatment prior to leaching was proposed as an option that increases the dissolution of copper from sulphide ores. In this study, a mineral sample from a copper mining company was used. The copper grade of the sample was 0.79%, and its main contributor was chalcopyrite (84%). The effect of curing time (as pretreatment) in a chloride media on copper sulphide ore was evaluated at various temperatures: 25, 50, 70 and 90 °C. The pretreated sample and leaching residues were characterized by X-ray diffraction, scanning electron microscopy, and reflected light microscopy. Pretreatment products such as CuSO4, NaFe3(SO4)2(OH)6, and S0 were identified although with difficulty, due to the low presence of chalcopyrite in the initial sample (1.99%). Under the conditions of 15 kg/t of H2SO4, 25 kg/t of NaCl, and 15 days of curing time, a copper extraction of 93.1% was obtained at 90 °C with 50 g/L of Cl− and 0.2 M of H2SO4.

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“…Another emerging method is biohydrometallurgy, which plays an important role in the recovery of copper from copper sulfides with economic, environmental, and social benefits [13]. To date, many investigations on acid bioleaching of secondary sulfides [14,15] and primary sulfides [16][17][18] have been reported presenting good results.…”

Section: Heap Leachingmentioning

confidence: 99%

Optimization of the Heap Leaching Process through Changes in Modes of Operation and Discrete Event Simulation

et al. 2019

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The importance of mine planning is often underestimated. Nonetheless, it is essential in achieving high performance by identifying the potential value of mineral resources and providing an optimal, practical, and realistic strategy for extraction, which considers the greatest quantity of options, materials, and scenarios. Conventional mine planning is based on a mostly deterministic approach, ignoring part of the uncertainty presented in the input data, such as the mineralogical composition of the feed. This work develops a methodology to optimize the mineral recovery of the heap leaching phase by addressing the mineralogical variation of the feed, by alternating the mode of operation depending on the type of ore in the feed. The operational changes considered in the analysis include the leaching of oxide ores by adding only sulfuric acid (H2SO4) as reagent and adding chloride in the case of sulfide ores (secondary sulfides). The incorporation of uncertainty allows the creation of models that maximize the productivity, while confronting the geological uncertainty, as the extraction program progresses. The model seeks to increase the expected recovery from leaching, considering a set of equiprobable geological scenarios. The modeling and simulation of this productive phase is developed through a discrete event simulation (DES) framework. The results of the simulation indicate the potential to address the dynamics of feed variation through the implementation of alternating modes of operation.

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Enhancing the Leaching of Chalcopyrite Using Acidithiobacillus ferrooxidans under the Induction of Surfactant Triton X-100

Cited by 25 publications

References 54 publications

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Pretreatment to Leaching for a Primary Copper Sulphide Ore in Chloride Media

Optimization of the Heap Leaching Process through Changes in Modes of Operation and Discrete Event Simulation

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