ferric chloride leaching of copper from chalcopyrite

ferric chloride leaching of copper from chalcopyrite

Ferric chloride leaching of chalcopyrite: Synergetic ...

Mar 01, 2008 · The effect of agitation on the copper recovery from chalcopyrite crystals when leached in ferric chloride was studied at a temperature of 90 °C in 0.5 M FeCl 3 –0.5 M HCl. The results are shown in Fig. 2. Unexpectedly, agitation had a negative effect on the amount of copper extracted.

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...

Copper leaching from chalcopyrite concentrate in Cu(II)/Fe ...

May 01, 2013 · Copper leaching from chalcopyrite concentrate in ferric and cupric chloride system was investigated using a two-stage countercurrent leach circuit under a nitrogen atmosphere at 97 °C to minimize the concentrations of cupric and ferric ions in pregnant leach solution for subsequent copper solvent extraction while maintaining a maximum copper ...

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.

Ferric chloride leaching of sulphidized chalcopyrite ...

Mar 01, 1983 · By leaching by ferric chloride a covellite/pyrite combination (45% S), at least 95% of the copper can be extracted with essentially zero iron dissolution, providing the

Chloride leaching of chalcopyrite - ScienceDirect

Dec 01, 2007 · Two new process flowsheets have been developed which combine chloride leaching of copper from chalcopyrite with solvent extraction, to selectively transfer copper to a conventional sulfate electrowinning circuit.

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

Chalcopyrite Leaching - Metallurgist & Mineral Processing ...

May 05, 2017 · Munoz (1977) reported that the mechanism by which chalcopyrite dissolves is by the continuous removal of iron and copper from the lattice with iron being removed first and then followed by removal of copper.

Cupric Chloride Leaching of Chalcopyrite | SpringerLink

高达12%返现 · 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 Author information Affiliations Cyprus Metallurgical Process Corporation, Tucson, Arizona, USA

Chloride heap leaching - BHP Billiton SA Limited

Chalcopyrite is one of the most refractory copper sulphide minerals in relation to leaching in acidic ferric chloride and ferric sulphate systems at low temperature. This is exemplified by the mineral's slow leaching kinetics, which level off with time.

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

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 ...

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

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 ...

(PDF) Leaching of chalcopyrite in cupric chloride solution

Although the literature contains many references to ferric and cupric chloride leaching of chalcopyrite concentrates [37], of which the studies by Dutrizac [75,76], Majima et al. [77], and Holdich ...

Chloride leaching for chalcopyrite - UBC Library Open ...

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. Both models were designed to address the common chloride hydromet problem of product impurity, and they differ with respect to iron deportment.

Chlorate-based oxidative hydrometallurgical extraction of ...

Mar 01, 2009 · It should however be noted that other authors have reported that copper can be extracted during the oxidative leaching of chalcopyrite by ferric ions (Hiroyoshi et al., 2004). Also, Dixon and Tshilombo, 2007 , Dixon et al., 2008 have reported that pyrite is able to oxidize chalcopyrite in an acidic iron sulfate solution in a process the authors ...

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 ...

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 ...

Leaching Chalcocite in Chloride Media—A Review

Oct 28, 2021 · Chalcocite is the most abundant secondary copper sulfide globally, with the highest copper content, and is easily treated by conventional hydrometallurgical processes, making it a very profitable mineral for extraction. Among the various leaching processes to treat chalcocite, chloride media show better results and have a greater industrial boom. Chalcocite dissolution is a two-stage

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

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

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.

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.

Copper leaching from chalcopyrite concentrate in Cu(II)/Fe ...

Copper leaching from chalcopyrite concentrate in ferric and cupric chloride system was investigated using a two-stage countercurrent leach circuit under a nitrogen atmosphere at 97 degrees C to ...

(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 ...

Passivation of chalcopyrite during its chemical leaching ...

evidences on the passivation of chalcopyrite during its chemical leaching with ferric sulphate at 68 C. That leaching process seems to be greatly affected by the formation of a layer of jarosite on the chalcopyrite surface. Thus, the copper dissolution rate could be indirectly affected by pH because of iron hydrolysis. In this study, 0 10 20 30 ...

Chlorate-based oxidative hydrometallurgical extraction of ...

Mar 01, 2009 · It should however be noted that other authors have reported that copper can be extracted during the oxidative leaching of chalcopyrite by ferric ions (Hiroyoshi et al., 2004). Also, Dixon and Tshilombo, 2007 , Dixon et al., 2008 have reported that pyrite is able to oxidize chalcopyrite in an acidic iron sulfate solution in a process the authors ...

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

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.

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.

Solvometallurgical process for extraction of copper from ...

In sulfate media, the leaching kinetics are generally slow (several months) and the leaching of copper is difficult to be complete, due to the formation of passivation layers on the surface of chalcopyrite, such as solid sulfur and iron precipitate (e.g. jarosite). 1 In chloride media, the leaching rate is faster than that in sulfate media, due ...

Recovery of Silver, Gold, and Lead From a Complex Sulfide ...

USING FERRIC CHLORIDE, THIOUREA, AND BRINE LEACH SOLUTIONS By R. G. Sandberg 1 and J. L. Huiatt 2 ABSTRACT The Bureau of Mines investigated a hydrometallurgical procedure to re­ cover gold, silver, and byproduct lead from a complex lead-zinc sulfide ore. A ferric chloride (FeCI3 ) preleach, at 40° C in 6 h, extracted

NIOSHTIC-2 Publications Search - 10007586 - Improvements ...

A method to recover copper and elemental sulfur from chalcopyrite concentrate, using a ferric chloride leach, cufes2 + 3fecl3 -> cucl + 4fecl2 + 2s, was reported by the federal Bureau of Mines in 1971 (report of investigations 7474). Additional work has been done to improve the recovery of sulfur from the leach residue, the recovery of copper and iron from the leach solution, and the regeneration

Chalcopyrite - BioMineWiki

This again renders the extraction of copper uneconomical by this process. Other leaching systems that have been studied over the years for the extraction of copper from chalcopyrite on laboratory or pilot scale include systems employing concentrated solutions of ferric chloride or

Effect of Chalcopyrite Leaching Additives

Mar 04, 2018 · Previous U.S. Bureau of Mines (USBM) research on the leaching of chalcopyrite with ferric sulfate [Fe2(SO4)3] demonstrates that surfactant additions enhance chalcopyrite (CuFeS2) leaching and that surfactant selection has a significant impact on the initial leaching rate. Additions of chloride ion (Cl-) are also known to enhance chalcopyrite leaching, although a review of the

Minerals | Free Full-Text | Accelerating Copper Leaching ...

Shiers et al. studied leaching chalcopyrite using different oxidants: hypochlorous acid, sodium chlorate and sodium nitrate with the addition of ferric ions (ferric sulfate, ferric nitrate and ferric chloride), and obtained a copper extraction of 92% in chloride-nitrate-ferric mixture, which proved favorable for chalcopyrite leaching at 50 °C.

Characterization and Flotation of Sulfur from Chalcopyrite ...

When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of 14.5% in a single-stage froth flotation. The chalcopyrite flotation concentrate can