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Leaching of Copper from Metal Powders Mechanically ...

The low copper extraction within experimental conditions may be attributed to the facts that the metal copper was dissolved in the presence of oxygen of acidic chloride leaching solutions14. With the addition of H 2O 2 into leaching solutions, the copper extraction increased significantly to 60.8% in 90 min with the presence of 0.05 mol/L H 2O

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CA2651516C - Chloride heap leaching - Google .

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 Copper Sulphides - SAIMM · Fichier PDF

Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. Ferric sulphate leaching and copper chloride leaching are carried out at atmospheric pressure while total .

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Cupric Chloride Leaching of Chalcopyrite | .

In a strong chloride solution the predominant cuprous, cupric, ferrous, and ferric chloride complexes are CuCl3 −2, CuCl+, CuCl2, FeCl2, and FeCl2 + respectively. The probable dissolution reaction for chalcopyrite in cupric chloride solution is CuFeS2 + 3CuCl+ + 11Cl−2 = 4CuCl3 −2 + FeCl2 + 2S The standard free energy change for this reaction at 25°C and unit activities is +43.84 kJ ...

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Leaching Solution - an overview | ScienceDirect .

Leaching is carried out using a concentrated solution of sodium chloride with the anodically produced oxidation agent, producing high-purity copper with side products containing gold and silver. The primary oxidation agents are cupric ions and halogen complexes (halexes) which form on .

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Primary copper sulfides bioleaching vs. chloride .

01.03.2017 · Copper balances showed that bioleaching is significantly more advantageous than chemical chloride treatments in terms of leaching kinetics and final copper recovery. These advantages were correlated to different primary copper sulfides leaching mechanisms that are .

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Behavior of Copper Dissolution in an Ammonia Solution ...

The leaching solution was prepared from either copper chloride (NH3 solution and NH4Cl) or copper sulfate (NH3 solution and (NH4)2SO4). Copper plates were immersed in these solutions and stirred at 298~353 K. The leaching speed of copper was calculated from the obtained weight loss data. Moreover, influence concentrations of NH3 and

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Remove Copper from Moly by Ferric Chloride .

Table of ContentsProcess ChemistryGeneral Flow SheetSolution Regeneration The Anaconda Minerals Company operates a molybdenite and copper producing mine and mill facility near Tonopah, Nevada. Included with the milling facility is a ferric chloride leach plant for removal of copper mineralization from the molybdenite concentrates. Discussed are the engineering and construction schedules ...

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Leaching of Primary Copper Sulfide Ore in .

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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Acid-Nitrate-Chloride Media Using .

The optimum copper extraction of 63.9% was obtained in the mini-column leaching test at 25 C, with the use of 20 g/L of chloride. A higher temperature (45 C) and a higher chloride concentration (40 g/L) negatively affected the extraction. The pretreatment stage had favorable effects, in terms of accelerating copper dissolution and improving leaching of copper sulfide ore in acid-nitrate ...

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Pyrite Leaching Behaviour under CESL Process Conditions

The CESL Copper Process typically comprises the steps of concentrate regrinding, the oxidation of sulphide concentrates at elevated pressure and temperature in the presence of catalytic chloride ions, leach residue separation and washing, and Cu recovery via solvent extraction and electrowinning. Additional steps in the flowsheet include neutralization of any acid generated across leaching ...

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A review of chloride assisted copper sulfide leaching by ...

which include leaching in acidic calcium chloride solutions (~2 mol.dm-3 Cl-) followed by conventional solvent extraction, stripping as sulfate, electrowinning, and iron removal as goethite or hematite (Liddicoat and Dreisinger, 2007). The beneficial effect of low chloride addition for the leaching of copper-nickel

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Leaching of Trace Amounts of Metals from .

With decreasing ore grades, the tailings of mining operations are becoming of increasing interest as metal-containing secondary raw materials. The objective of the current work was to investigate chloride leaching of gold, copper, cobalt, nickel, and zinc present in the flotation tailings. In the current study, the effect of cupric ion as an oxidant (0–50 g/L) and NaCl (150–250 g/L) on ...

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Chalcopyrite Leaching in Acidic Chloride Solution without ...

Article. Mex. Chem. Soc. 2016, 60(4), 238-246 2016, Sociedad Química de México ISSN 1870-249X Chalcopyrite Leaching in Acidic Chloride Solution without Sulphates Eduardo Luis Recalde Chiluiza1,2* and Patricio Navarro Donoso1 1 Universidad de Santiago de Chile, Department of Metallurgical Engineering, Av. Bernardo O'Higgins 3363, Santiago, Chile. 2 Escuela Superior Politécnica del Litoral ...

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Chloride Leaching Sulfide ConcentratesTraduire cette page

Leaching is performed with cupric and ferric chloride. Preparation of cell house feed by reaction with cement copper. Recovery of copper as granules in diaphragm cells while simultaneously oxidizing copper and iron for recycling to second stage leach. Complete digestion of copper minerals in second leach utilizing raffinate. The second leach is ...

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(PDF) Leaching of Copper Sulphides - .

Copper chloride leaching can make use of so me saline wa ter sources, reducing the need for sodium chloride make-up. In addition, this flexibility can reduce the raw water demand

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Analysis of iron and copper speciation and activities .Traduire cette page

01/03/2020 · In the chloride concentration range 0.5 M – 3 M, CuCl + and CuCl 32− were the dominant copper species. Based on the speciation and activities results, we determined the actual cathodic and anodic half reactions responsible for copper leaching from chalcocite in chloride media.

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Ferric Chloride Leaching

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, thereby increasing the ex-traction of copper ...

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NICKEL MATTE CHLORIDE LEACHING

aqueous solution with copper, cobalt, and nickel solvent extractions, and ammonium chloride is regenerated into ammonia. The water balance is controlled by evapora-tion after the ammonia regeneration. Calcium chloride is regenerated into hydrochloric acid and the solution is returned to leaching. In total, the leaching process takes

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Leaching of Trace Amounts of Metals from .

With decreasing ore grades, the tailings of mining operations are becoming of increasing interest as metal-containing secondary raw materials. The objective of the current work was to investigate chloride leaching of gold, copper, cobalt, nickel, and zinc present in the flotation tailings. In the current study, the effect of cupric ion as an oxidant (0–50 g/L) and NaCl (150–250 g/L) on ...

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