Ferric Chloride Leaching Of Copper From Chalcopyrite

Ferric Chloride Leaching of Chalcopyrite Concentrate

Jan 02, 2021  The leach solution contains approximately 36 percent ferric chloride and about 1 percent hydrochloric acid. During leaching about 99 percent of the copper, 84 percent of the iron, 90 percent of the calcium, and 96 percent of the silver are dissolved. The representative reaction for dissolving chalcopyrite is. CuFeS2 + 3FeCl3 → CuCl + 4FeCl2 + 2S.

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Ferric chloride leaching of mechanically activated ...

Jun 01, 1998  To this end, chalcopyrite was autogenously milled in a horizontal mill, and leaching was conducted using a 5 M chloride leach solution. Leaching of as-received concentrate resulted in copper extractions of 75% in 5 h of leaching, whereas leaching mechanically activated concentrates resulted in copper extractions over 95% after 3 h of leaching.

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Ferric chloride leaching of chalcopyrite: Synergetic ...

In order to leach chalcopyrite and chalcocite under atmospheric or high pressure leaching conditions in sulfate or chloride medium, ferric and copper ions, bacteria, oxygen and other oxidizers can ...

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Ferric chloride leaching of sulphidized chalcopyrite ...

Mar 01, 1983  1. Ferric chloride leaching of chalcopyrite sulphidized to give covellite and pyrite; effect of temperature on reaction stoichiometry. Line a: theoretical results assuming only covellite leached according to reaction (1). Solids addition (108 g to 500 ml 2.0 M FeCI,, 0.6 M HC1) is maximum for complete copper recovery assuming only reaction (1 ...

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Ferric chloride leaching of mechanically activated ...

Jun 01, 1998  To this end, chalcopyrite was autogenously milled in a horizontal mill, and leaching was conducted using a 5 M chloride leach solution. Leaching of as-received concentrate resulted in copper extractions of 75% in 5 h of leaching, whereas leaching mechanically activated concentrates resulted in copper extractions over 95% after 3 h of leaching.

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OPTIMIZATION OF FERRIC CHLORIDE LEACHING

copper extraction from chalcopyrite of approximately 89% were achieved. Keywords: Chalcopyrite, acid leaching, ferric ion, Taguchi experimental design, Minitab 16.0. Introduction Chalcopyrite, (CuFeS2), is the most important copper mineral in nature.1,2 It is generally separated from associated gangue minerals by

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Ferric Chloride Leaching Of Copper From Chalcopyrite

Copper Leaching From Chalcopyrite Concentrate in Cu (II)-Fe. A high calcium chloride concentration (110–165 g/L) was used to main-Chloride leaching Chalcopyrite tain a high cuprous solubility and enhance copper leaching. With 3–4 h of leaching time for each stage, the copper extraction reached 99% or higher while that of iron was around 90%.

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Leaching of chalcopyrite with ferric ion. Part I: General ...

Aug 01, 2008  Sullivan concluded that ferric chloride is a better chalcopyrite leaching agent than ferric sulphate and that the effect was more marked at high temperatures. Dutrizac et al. (1969) found that, in a temperature range between 50 and 100 °C, the chalcopyrite leaching rate was linear in chloride medium and parabolic in sulphate medium.

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LEACHING OF COPPER CONCENTRATES

and sulfate ions, Ferric ion results from the acidic leaching of any iron-containing material. It may be a minor problem, as in leaching high grade chalcocite, or a very major problem, as in leaching chalcopyrite. While ferric ion is not a major problem in basic leaching, the inability of

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Leaching of chalcopyrite concentrate with ferric chloride

The leaching of natural chalcopyrite was studied in both ferric chloride and ferric sulfate solutions. The morphology of leaching was studied by using a single chalcopyrite crystal and it appeared ...

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Chloride heap leaching - BHP Billiton SA Limited

The invention claimed is: 1. A hydrometallurgical method of recovering copper from a material, in a heap, that contains a copper sulphide mineral which contains at least chalcopyrite comprising leaching the material in an acidic chloride solution or a mixed chloride/sulphate solution in the presence of dissolved oxygen and maintaining the mineral's surface potential within a range of 550 mV ...

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Ferric and Cupric Chloride Leaching of Valuable Metals ...

the oxidant concentration increased up to 50 g/L in cupric chloride leaching, and copper extraction was lower (15 – 30 %-units) than in ferric chloride leaching (Figure 2). Figure 2: Extraction of copper in ferric and cupric chloride leaching with various concentrations of oxidants (pH = 1 – 1.8, T = 95 °C, concentration of NaCl = 250 g/L).

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Leaching of Copper Sulphides - SAIMM

POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the

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US8070851B2 - Chloride heap leaching - Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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copper leaching concentrates

A method of leaching copper from copper sulphidecontaining concentrates such as chalcopyrite includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface the process being carried out under conditions whereby the pyrite is not materially oxidized for example by maintaining the operating ...

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Chalcopyrite Leaching - Metallurgist Mineral Processing ...

May 05, 2017  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) containing chalcopyrite to be placed under leach but report low recovery +/-30% TCu over several years and the rate is around 0.5-1% per month.

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Cu Leaching Using Regenerated Ferric Sulphate

mixtures during the leach (to regenerate in-situ the ferric needed to extract the copper) allows similar good extractions (>95% Cu) to be achieved with only 10 g/L iron in solution, as indicated in Table III. Such leach solutions would be much easier to process. Table III - Summary Results of Regenerated Ferric Sulphate Leach (10% solids, 2% SO

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Cupric Chloride Leaching of Chalcopyrite SpringerLink

Dec 11, 2014  D.L. Jones and E. Peters, “The Leaching of Chalcopyrite with Ferric Sulphate and Ferric Chloride,” in Extractive Metallurgy of Copper, Vol. II, edited by J.C. Yannopoulos and J.C. Agarwal, TMS-AIME, 1976, p. 633–653. Google Scholar Download references

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Copper leaching from nanoparticles of chalcopyrite ...

Jul 06, 2008  In this research, the effect of mechanical activation, via ball milling, of copper sulfide concentrate on the efficiency and mechanism of copper leaching in an acidic ferric chloride solution was investigated. Copper concentrate, containing chalcopyrite as the main constituent, was supplied from Sarcheshme mine, located in the central part of Iran. By 24 hours of ball milling, the size of the ...

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The leaching of chalcopyrite with ferric chloride - NASA/ADS

The leaching of chalcopyrite with ferric chloride. A comparative study of electrochemical leaching and chemical leaching of chalcopyrite was done to elucidate the leaching mechanism of chalcopyrite with FeCl 3. The leaching rate of chalcopyrite exhibits a half order dependency on the FeCl 3 concentration, whereas it is independent of the FeCl 2 ...

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The leaching of chalcopyrite with ferric chloride ...

A comparative study of electrochemical leaching and chemical leaching of chalcopyrite was done to elucidate the leaching mechanism of chalcopyrite with FeCl 3.The leaching rate of chalcopyrite exhibits a half order dependency on the FeCl 3 concentration, whereas it is independent of the FeCl 2 concentration. The mixed potential of chalcopyrite exhibits a 72 mV decade −1 dependency upon ...

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(PDF) Copper Leaching from Nanoparticles of Chalcopyrite ...

A method to recover copper and elemental sulfur from chalcopyrite concentrate, using a ferric chloride leach, CuFeS//2 plus 3FeCl//3 yields CuCl plus 4FeCl//2 plus 2S, was reported by the Federal ...

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Chloride leaching for chalcopyrite - UBC Library Open ...

Title: Chloride leaching for chalcopyrite: Creator: Liddicoat, Jenni Anne: Publisher: University of British Columbia: Date Issued: 2003: Description: Two new process flowsheets have been developed which combine chloride leaching for chalcopyrite with solvent extraction, to selectively transfer copper to a conventional sulfate electrowinning circuit.

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The Leaching of Chalcopyrite in Ferric Chloride and Ferric ...

Jul 18, 2013  Ferric chloride is a more effective reagent and this is attributable to the morphological characteristics of chalcopyrite leaching. The kinetics with both leachant solutions were found to be linear over an extended period, followed by an acceleration stage, as a

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(PDF) Leaching of chalcopyrite with ferric ion. Part I ...

Leaching of chalcopyrite with ferric ion. Part II: Effect of redox potential. By Antonio Ballester. THE KINETICS OF THE DISSOLUTION OF CHALCOPYRITE IN CHLORIDE MEDIA Lilian De Lourdes Velásquez Yévenes Metallurgical Engineer. By Gustavo Quezada. A Review on Novel Techniques for Chalcopyrite Ore Processing.

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CA2651516C - Chloride heap leaching - Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride or mixed chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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WO2007134343A2 - Chloride heap leaching - Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride or mixed chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ...

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Copper leaching from chalcopyrite concentrates SpringerLink

Chalcopyrite (CuFeS2) is one of the most abundant copper-bearing minerals, which accounts for approximately 70 percent of the world’s known copper reserves. For more than 30 years, a significant number of processes have been developed to leach copper from chalcopyrite concentrates. These processes recover copper via hydrometallurgical leaching of the copper component of chalcopyrite ...

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Leaching of chalcopyrite in cupric chloride solution

In general, the leaching of chalcopyrite is more effective in chloride solutions with cupric ions as the oxidant than in sulfate solutions with ferric ions as the oxidant. This is possibly due to kinetic rather than thermodynamic considerations e.g. the higher rates of electron transfer in chloride

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copper leaching concentrates

A method of leaching copper from copper sulphidecontaining concentrates such as chalcopyrite includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface the process being carried out under conditions whereby the pyrite is not materially oxidized for example by maintaining the operating ...

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Ferric Chloride Leaching

Oct 15, 2018  Ferric chloride leaching can be made selective, and more than 99 pct lead extraction can be obtained in 15 min. Additional leaching time increases solubilization of chalcopyrite and sphalerite. Because leaching and filtration were performed batchwise in the experimental unit, the contact time between solution and concentrate was at least 30 min ...

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