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chalcopyrite leaching

Chalcopyrite Leaching - Metallurgist & Mineral

2021-3-1 · Leaching Chalcopyrite is the holy grail for hydrometallurgists (Leachers), difficult to leach as the sulfur forms a layer over the mineral and makes the leaching slow. Having said that, it is not 100% not leachable, not unusual for ore dumps (low grade)

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Chalcopyrite leaching: The rate controlling factors ...

2010-5-15 · The processes that determine the rate of chalcopyrite leaching are central to understanding how chalcopyrite (CuFeS 2) behaves under the environmentally adverse conditions of acid rock drainage.To this end the effect of the acid anion on chalcopyrite leach rates using a variety of acidic media (H 2 SO 4, HClO 4, HCl and H 2 SO 4 with 0.25 M NaCl) under carefully controlled solution

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Current scenario of chalcopyrite bioleaching: A review

2015-11-1 · However, chalcopyrite has been particularly recalcitrant to chemical leaching owing to its special electrochemistry (Li et al., 2013). Today, “Bio-hydrometallurgy” (involving bioleaching (BL) – SX – EW) is considered as a more advanced version and is of immense interest to the mineral processing industries for processing low grade ...

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(PDF) LEACHING OF CHALCOPYRITE CONCENTRATE

Chalcopyrite, CuFeS2 is the most important mineral of copper, but it is a refractory mineral and does not easily dissolve in various leaching solutions.

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(PDF) Sulphuric acid chalcopyrite leaching using

Leaching characteristics of chalcopyrite concentrate from Cuba were investigated in acidified FeCl3 and acidified FeCl3 + CCl4. Carbon tetrachloride was used as solvent for the elemental sulfur ...

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A model for ferrous-promoted chalcopyrite leaching ...

2000-8-1 · The ferrous-promoted chalcopyrite leaching proposed here is a kind of activated leaching, but the ferrous-promoted chalcopyrite leaching is different from conventional activated leaching in one point: In the conventional methods, reduction of chalcopyrite and oxidation of the intermediate must occur separately because reductants such as SO 2 ...

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Comparative Leaching Study on Conichalcite and ...

2019-4-5 · The chalcopyrite, sample B, was the main mineral with 0.60% copper grade with 0.73% sulfur and 0.032% molybdenum. Leaching systems utilized two oxidants (ferric ion and hydrogen peroxide) to investigate the kinetics of copper extractions. All leaching tests

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Thermophilic Bioheap Leaching of Chalcopyrite

2015-12-27 · The chalcopyrite quickly becomes passivated and unacceptable copper extractions are achieved. It was not until the adoption of thermophilic systems that the biological leaching of chalcopyrite became a reality. There are several stirred tank processes currently being put forward for the biological extraction of copper from chalcopyrite including

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Enhancement of chalcopyrite leaching by ferrous ions

2001-5-1 · The effects of ferrous ions on chalcopyrite oxidation with ferric ions in 0.1 mol dm −3 sulfuric acid solutions were investigated by leaching experiments at 303 K in nitrogen. With high cupric ion concentrations, the chalcopyrite oxidation was enhanced by high concentrations of ferrous ions and copper extraction was mainly controlled by the concentration ratio of ferrous to ferric ions or ...

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LEACHING OF CHALCOPYRITE CONCENTRATE IN

Leaching of chalcopyrite concentrate in hydrogen peroxide solution 663 Fig. 6. Microscopic photograph of chalcopyrite concentrate after hydrogen peroxide leaching Conditions: 3.0 M H 2 O 2, 40°C, 2 g/cm 3 (75x53 µm) chalcopyrite concentrate, no stirring Fig. 7. XRD patterns for a pyrite concentrate before (SA3) and after (SA4) the leaching

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Thermophilic Bioheap Leaching of Chalcopyrite

2015-12-27 · The chalcopyrite quickly becomes passivated and unacceptable copper extractions are achieved. It was not until the adoption of thermophilic systems that the biological leaching of chalcopyrite became a reality. There are several stirred tank processes currently being put forward for the biological extraction of copper from chalcopyrite including

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Percolation Leaching of a Chalcopyrite-Bearing Ore at ...

PERCOLATION LEACHING OF A CHALCOPYRITE .BEARING ORE AT AMBIENT AND ELEVATED TEMPERATURES WITH BACTERIA By B. W. Madsen, 1 and R. D. Groves 2 ABSTRACT The Bureau of Mines conducted a large-scale (6.4 t), long-term (2,165 days) test to gain a better understanding of the leaching characteris­ tics of chalcopyritic ores.

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Solvometallurgical process for extraction of copper

Leaching of chalcopyrite Leaching of copper from chalcopyrite was first studied with different solvents and oxidizing agents at 60 °C. The following organic solvents were used for chalcopyrite leaching: ethanol (EtOH), propylene glycol (PG) and ethylene glycol (EG) ().The solvent has a significant effect on the leaching efficiency of iron and copper, when the same concentration of FeCl 3 was ...

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Improving the chalcopyrite atmospheric leaching using ...

2017-5-26 · chalcopyrite surface passivation, which caused the additives to perform better. Keywords: chalcopyrite, improved leaching, controlled oxidation-reduction potential, additive treatment, pyrite, sodium chloride, silica Introduction Chalcopyrite is the most

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LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

2013-9-7 · leaching product on the mineral surface, as confirmed using XRD and SEM/EDX. The semi-empirical equation explaining the reaction rate under the present conditions was expressed as follows: X X t C e T 4096.7 0,83 0 0.96 NaNO 4 3 2 2 1 56.53 10 3 2 1 J. Keywords: chalcopyrite, pressure leaching, nitrogen species, kinetics Introduction

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Copper leaching from chalcopyrite concentrate by

2019-9-26 · Effective leaching of chalcopyrite from mineral concentrate requires the application of oxidant, and/or high pressure [4,10]. Also, acidophilic microorganisms (bacteria and archaea) can be applied to catalyse leaching of copper from chalcopyrite [11-13]. Numerous research papers were published describing the ...

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Chalcopyrite (Bio)leaching in Sulphate Solutions : An ...

Heap (bio)leaching of copper oxides and secondary sulphides (covellite (CuS) and chalcocite (Cu2S)) is a proven technology and a convenient process nowadays. However, chalcopyrite is recalcitrant to leaching and bioleaching in conventional leaching systems in sulphate media.

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Redox potential dependence of chalcopyrite leaching in ...

2017-9-20 · leaching kinetics of chalcopyrite (CuFeS 2), which is a major copper mineral in copper concentrates. Chalcopyrite leaching rate is slower than other copper sulfide minerals such as covellite (CuS), bornite (Cu 5FeS 4), and chalcocite (Cu 2S) (Nicol et al., 2010). In acid solutions, chalcopyrite is oxidized by ferric ions: CuFeS 2 + 4 Fe

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Comparative Leaching of Chalcopyrite by Selected ...

2018-6-28 · A systematic study of the bioleaching of chalcopyrite (CuFeS 2 ) was conducted using axenic cultures of 11 species of acidophilic Bacteria and Archaea to obtain a direct comparison of the microbial chalcopyrite leaching capabilities of the different cultures and

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Thermophilic Bioheap Leaching of Chalcopyrite

2015-12-27 · The chalcopyrite quickly becomes passivated and unacceptable copper extractions are achieved. It was not until the adoption of thermophilic systems that the biological leaching of chalcopyrite became a reality. There are several stirred tank processes currently being put forward for the biological extraction of copper from chalcopyrite including

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A BACTERIAL HEAP LEACHING APPROACH FOR THE

2009-8-26 · The leaching of chalcopyrite requires elevated heap temperatures to obtain economic copper recoveries, and the heap leach design therefore focuses on the generation of exothermic heat, by utilizing bacterially-assisted conversion of pyrite and other sulphide species, with the aid of forced aeration. Heat

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Improving the chalcopyrite atmospheric leaching using ...

2017-5-26 · chalcopyrite surface passivation, which caused the additives to perform better. Keywords: chalcopyrite, improved leaching, controlled oxidation-reduction potential, additive treatment, pyrite, sodium chloride, silica Introduction Chalcopyrite is the most

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武汉理工大学资源与环境工程学院欢迎您

2019-5-17 · The mechanisms of improved chalcopyrite leaching due to mechanical activation, Hydrometallurgy, 2017, 173, 149-155. IF: 3.3, Q1. 16. Yubiao Li *, Xinyu Wang, Qing Xiao, Xu Zhang, Study on Selective Removal of Impurity Iron from Leached Copper-Bearing

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LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

2013-9-7 · leaching product on the mineral surface, as confirmed using XRD and SEM/EDX. The semi-empirical equation explaining the reaction rate under the present conditions was expressed as follows: X X t C e T 4096.7 0,83 0 0.96 NaNO 4 3 2 2 1 56.53 10 3 2 1 J. Keywords: chalcopyrite, pressure leaching, nitrogen species, kinetics Introduction

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Copper leaching from chalcopyrite concentrate by

2019-9-26 · Effective leaching of chalcopyrite from mineral concentrate requires the application of oxidant, and/or high pressure [4,10]. Also, acidophilic microorganisms (bacteria and archaea) can be applied to catalyse leaching of copper from chalcopyrite [11-13]. Numerous research papers were published describing the ...

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Chalcopyrite Leaching in Acidic Chloride Solution without ...

2019-9-30 · Chalcopyrite Leaching in Acidic Chloride Solution without Sulphates 239 To determine the effect of dissolved oxygen and its partic-ipation in the reactions that take place on the surface of the chalcopyrite, tests were performed in solutions with and with-out dissolved oxygen. Aerobic tests were carried out by intro-

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Comparative Leaching of Chalcopyrite by Selected ...

2018-6-28 · A systematic study of the bioleaching of chalcopyrite (CuFeS 2 ) was conducted using axenic cultures of 11 species of acidophilic Bacteria and Archaea to obtain a direct comparison of the microbial chalcopyrite leaching capabilities of the different cultures and

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Optimization of Chalcopyrite Galvanic Leaching in the ...

er leaching progress, low operating and capital cost, ease of copper recovery with solvent extraction and electrow-inning (Nazari et al., 2011). However, the formation of a passive layer during chalcopyrite leaching on the sur-face of a mineral can diminish the advantages by pre-venting reactant transportation on the chalcopyrite inter-

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Jetti Resources | A Technology Driven Natural

Jetti makes it possible to extract copper from low-grade primary sulfides, such as chalcopyrite, the world’s most abundant copper mineral ore. Jetti’s commercially proven and proprietary catalytic technology addresses the key technical problem preventing recovery of trillions of dollars of trapped resources.

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