extraction of copper from copper sulphide

extraction of copper from copper sulphide

Direct extraction of copper from copper sulfide minerals ...

Direct extraction of copper from copper sulfide minerals using deep eutectic solvents† Syahrie Anggara , a Francesca Bevan , a Robert C. Harris , a Jennifer M. Hartley , ab Gero Frisch , b Gawen R. T. Jenkin c and Andrew P. Abbott * a

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US3933475A - Extraction of copper from copper sulfides ...

Copper is recovered from its sulfidic ores by a process wherein the ore is mixed and fused with at least a stoichiometric amount of a sulfide of sodium or potassium which may be prepared in situ by reacting sulfur with potassium or sodium hydroxide. The mixture is heated under vacuum in the absence of water, oxygen and CO 2 to a temperature above the melting point of the selected potassium or ...

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In the extraction of copper from its sulphide ore

In the extraction of copper from its sulphide ore Stage 3: roasing at this stage of the process, chemical reactions begin. convert copper ores into copper metal. we can illustrate the process types using the example of chalcopyrite – cufes2. from the formula, it is clear that the iron and sulfur must be removed to produce copper. the roasting process: changes part of the cufes2 to copper ...

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Extraction of copper from sulphides - Free ZIMSEC ...

Apr 29, 2016  \text{copper sulphide+oxygen}\rightarrow\text{copper+sulpher dioxide} Slag which contains most of the unwanted impurities forms a layer at the top of the molten copper and is tapped off; The remaining mixture is known as matte; It contains most of the copper, iron and sulpher; It is transferred to a converter

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How is copper extracted from its sulphide ore? Explain the ...

Then electrolytic refining of copper is carried out to remove the rest of the impurities present in the ore. The impure copper is made anode and strip of pure copper are made cathode. On passing the current as shown in the diagram, the pure copper from the anode dissolves into an electrolyte. An equivalent amount of copper is deposited on the ...

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Direct extraction of copper from copper sulfide minerals ...

Direct extraction of copper from copper sulfide minerals using deep eutectic solvents† Syahrie Anggara , a Francesca Bevan , a Robert C. Harris , a Jennifer M. Hartley , ab Gero Frisch , b Gawen R. T. Jenkin c and Andrew P. Abbott * a

More

US3933475A - Extraction of copper from copper sulfides ...

Copper is recovered from its sulfidic ores by a process wherein the ore is mixed and fused with at least a stoichiometric amount of a sulfide of sodium or potassium which may be prepared in situ by reacting sulfur with potassium or sodium hydroxide. The mixture is heated under vacuum in the absence of water, oxygen and CO 2 to a temperature above the melting point of the selected potassium or ...

More

In the extraction of copper from its sulphide ore

In the extraction of copper from its sulphide ore Stage 3: roasing at this stage of the process, chemical reactions begin. convert copper ores into copper metal. we can illustrate the process types using the example of chalcopyrite – cufes2. from the formula, it is clear that the iron and sulfur must be removed to produce copper. the roasting process: changes part of the cufes2 to copper ...

More

Extraction of copper from copper sulfides - SWANSON; ROLLAN

Extraction of copper from copper sulfides . United States Patent 3933475 . Abstract: Copper is recovered from its sulfidic ores by a process wherein the ore is mixed and fused with at least a stoichiometric amount of a sulfide of sodium or potassium which may be prepared in situ by reacting sulfur with potassium or sodium hydroxide. ...

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Recovery of Copper from Copper Sulfide Concentrate by ...

Jan 17, 2015  Sulfation Roasting, Copper Sulfide Concentrate, Copper Extraction 1. Introduction In the last three decades, the economic conditions and the increasingly stringent environmental legislation worldwide have led metallurgical industry more difficult to develop. In addition, copper

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Solvometallurgical process for extraction of copper from ...

Dec 13, 2019  Extraction of copper from sufidic ores, either by pyrometallurgy or hydrometallurgy, has various limitations. In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant (FeCl 3 as oxidizing agent and ethylene glycol (EG) as organic solvent).

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The Extraction of Copper - Chemistry LibreTexts

Jun 07, 2021  Extracting of Copper from Other Ores. Copper can be extracted from non-sulfide ores by a different process involving three separate stages: Reaction of the ore (over quite a long time and on a huge scale) with a dilute acid such as dilute sulfuric acid to produce a very dilute copper

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Direct extraction of copper from copper sulfide minerals ...

Sulfide in the mineral is oxidised to sulfate without the generation of SO2 or H2S. The best selective recovery of copper (99 at%) from chalcopyrite was obtained with a mixed DES of 20 wt% choline chloride-oxalic acid and 80 wt% choline chloride-ethylene glycol. This demonstrates how design of the Deep Eutectic Solvents can enable increased ...

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A new way of extracting copper MIT News Massachusetts ...

Jun 28, 2017  Most current copper extraction processes burn sulfide minerals in air, which produces sulfur dioxide, a harmful air pollutant that has to be captured and reprocessed, but the new method produces elemental sulfur, which can be safely reused, for example, in fertilizers. The researchers also used electrolysis to produce rhenium and molybdenum ...

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Copper leaching from primary sulfides: Options for ...

Sep 01, 2006  The primary sulfide minerals of copper have been difficult to leach for the purpose of direct copper extraction. In particular, chalcopyrite has been observed to undergo a type of “passivation” under a variety of oxidative leaching conditions.

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What Reducing agent of Cu2O in extraction of copper from ...

2Cu2O + Cu2S >> 6 Cu + SO2. One can easily notice that S changes its oxidation state from - II in Cu2S to +IV in SO2 i.e. it donates 6 electrons to reduce Cu(+I) to Cu(0). It's clear that S acts as a reducing agent. This is practically achieved in...

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copper extraction and purification - chemguide

Extracting copper from its ores. The method used to extract copper from its ores depends on the nature of the ore. Sulphide ores such as chalcopyrite are converted to copper by a different method from silicate, carbonate or sulphate ores. Getting copper from chalcopyrite, CuFeS 2

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(PDF) Copper leaching from primary sulfides: Options for ...

Copper leaching from primary sulfides: Options for biological and chemical extraction of copper

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Innovations in Copper: Mining Extraction: Producing ...

Producing Copper Nature's Way: Bioleaching Copper Applications in Mining Extraction. By William H. Dresher, Ph.D., P. E. Summary Examples Background Chemistry of Bioleaching Microbiology of Bioleaching Leaching Method Costs Research Conclusions References. Summary . Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to ...

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In the extraction of copper from its sulphide ore

In the extraction of copper from its sulphide ore Stage 3: roasing at this stage of the process, chemical reactions begin. convert copper ores into copper metal. we can illustrate the process types using the example of chalcopyrite – cufes2. from the formula, it is clear that the iron and sulfur must be removed to produce copper. the roasting process: changes part of the cufes2 to copper ...

More

Direct extraction of copper from copper sulfide minerals ...

Direct extraction of copper from copper sulfide minerals using deep eutectic solvents Green Chemistry ( IF 9.480) Pub Date : 2019-11-08, DOI: 10.1039/c9gc03213d Syahrie Anggara, Francesca Bevan, Robert C. Harris, Jennifer M. Hartley, Gero Frisch, Gawen R. T. Jenkin, Andrew P. Abbott

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Direct extraction of copper from copper sulfide minerals ...

Direct extraction of copper from copper sulfide minerals using deep eutectic solvents. Cite Download (1.1 MB)Share Embed. journal contribution. posted on 21.02.2020, 15:13 by Syahrie Anggara, Francesca Bevan, Robert C Harris, Jennifer M Hartley, Gero Frisch, Gawen RT Jenkin, Andrew P Abbott.

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Environmental effects on bacterial copper extraction from ...

In bacterial extraction of copper from low‐grade copper sulfide ores, at least three contributions are made by Thiobacillus ferrooxidans. They are: (1) enzymatic oxidation and consequent solubilization of insoluble sulfides; (2) regeneration of ferric lixiviant for chemical oxidation and solubilization of insoluble sulfides; and (3) partial fixation of externally introduced iron in the ore.

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Direct extraction of copper from copper sulfide minerals ...

Sulfide in the mineral is oxidised to sulfate without the generation of SO2 or H2S. The best selective recovery of copper (99 at%) from chalcopyrite was obtained with a mixed DES of 20 wt% choline chloride-oxalic acid and 80 wt% choline chloride-ethylene glycol. This demonstrates how design of the Deep Eutectic Solvents can enable increased ...

More

A new way of extracting copper MIT News Massachusetts ...

Jun 28, 2017  Most current copper extraction processes burn sulfide minerals in air, which produces sulfur dioxide, a harmful air pollutant that has to be captured and reprocessed, but the new method produces elemental sulfur, which can be safely reused, for example, in fertilizers. The researchers also used electrolysis to produce rhenium and molybdenum ...

More

Copper leaching from primary sulfides: Options for ...

Sep 01, 2006  The primary sulfide minerals of copper have been difficult to leach for the purpose of direct copper extraction. In particular, chalcopyrite has been observed to undergo a type of “passivation” under a variety of oxidative leaching conditions.

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Recover Cobalt Copper from Sulfide Concentrates

Feb 27, 2018  Since copper extraction decreases with decreasing pH, complete removal of copper from a concentrated solution requires neutralization of some of the free acid formed. For example, three-stage countercurrent extraction of pH 3.3 sulfate solution containing 12 g/L Cu with 10-pct LIX 622 reduced the aqueous pH to 0.6 and left 0.5 g/L Cu in the ...

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Leaching of Copper Sulphides - SAIMM

The technology should be suitable for retrofits, e.g., the conversion of a copper heap leach, solvent extraction (SX) and electrowinning (EW) facility once the oxide and transition material is exhausted (Valkama, 2013). Throughout this paper, ‘copper sulphides’ describes both mixed copper–iron sulphides, such as

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Solvent Extraction and Electrowinning from Copper Leaching ...

accumulated copper and plates are washed and turned over so that the process can be repeated (Calcutt, 2001). Modern hydrometallurgical processing of copper in the Central African Copper belt involves four stages – namely, leaching, separation, solvent extraction, and electrowinning. The preferred choice for processing ores from the democratic

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Copper Sulfide - an overview ScienceDirect Topics

All copper sulfides require the presence of Fe 3+ and O 2 as oxidizing agents for leaching to occur. The copper sulfide is oxidized by Fe 3+.The resulting Fe 2+ is reoxidized to Fe 3+ by O 2.The Fe(II)/Fe(III) redox couple acts in a catalytic manner in these reactions (shown for elevated-temperature reaction conditions where the sulfur-containing product is sulfate, rather than the elemental ...

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Copper Smelting Chemistry Tutorial

The earliest evidence of copper smelting occurs in Serbian artefacts dating from around 5000 BC. Copper can be extracted from oxide ores using electrolysis (electrowinning) for low grade ores, or by the carbon reduction method of smelting for higher grade ores. The process of extracting copper from higher grade sulfide ores involves:

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Electrochemistry of Molten Sulfides: Copper Extraction ...

Nov 30, 2019  The electrolytic extraction of liquid copper at 1105°C from a molten sulfide electrolyte composed of 57 wt% BaS and 43 wt% Cu 2 S was investigated. DC cyclic voltammetry, Fourier transformed AC voltammetry, and galvanostatic electrolysis revealed that the electrodeposition of copper is possible in the selected molten sulfide electrolyte.

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Solvometallurgical process for extraction of copper from ...

Extraction of copper from sufidic ores, either by pyrometallurgy or hydrometallurgy, has various limitations. In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant (FeCl 3 as oxidizing agent and ethylene glycol (EG) as organic solvent).

More