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SURVEY OF PROPOSED METHODS FOR LEACHING COPPER SULFIDES 0000000 000000 Ammonia Pressure Leaching Cyanidation Ferric Chloride Leach Acid Chlorine Leach Ferric Sulfate Leach ... as in leaching chalcopyrite. While ferric ion is not a major problem in basic leaching, ...
Ferric Chloride Leaching Of Copper From Chalcopyrite. The ferric ion consumption rates i.e., chemical leaching rates calculated from the on-line redox potential undulations matched well with the copper release rates obtained from copper analyses, showing that approximately four moles of ferric ions were consumed
Ferric Chloride Leaching Of Copper From Chalcopyrite. 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 .
01-03-2008· The effect of temperature upon copper recovery from chalcopyrite crystals leached in ferric chloride was studied using particles with a size of < 38 µm leached at temperatures of, 70, 80 and 90 °C for 3 h. The experimental results are shown in Fig. 5. As shown in this graph, the copper recovery is highly sensitive to temperature.
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 ...
Mar 01, 1983· Reactions between chalcopyrite and elemental sulphur at between 320°C and 400°C produce various combinations of covellite, nukundamite (Cu 5,5 FeS 6,5, and pyrite depending on the sulphur content of the products.If all the contained copper is transferred to covellite, and iron to pyrite, at least 95% of the copper can be leached by ferric chloride with negligible iron ...
01-09-2019· Screening experiments with ferric chloride and ferric sulfate were conducted to identify the most efficient oxidant for leaching. In preliminary tests, at 60 °C, after 5 days of leaching, the maximum copper extraction with ferric-sulfate solutions was 33%, whereas that with the ferric-chloride solution reached 70%.
CONCLUSION Ferric chloride leaching seems to be .extraction of copper completely from converter slag.chalcopyrite in aqueous acidic ferric sulphate . Cupric Chloride Leaching of Chalcopyrite Avraamides, The Leaching of Copper from Sulphur Activated Chalcopyrite with.and ferric chloride complexes are CuCl 3 2, CuCl +, CuCl 2, FeC.
01-03-1983· Reactions between chalcopyrite and elemental sulphur at between 320°C and 400°C produce various combinations of covellite, nukundamite (Cu 5,5 FeS 6,5, and pyrite depending on the sulphur content of the products. If all the contained copper is transferred to covellite, and iron to pyrite, at least 95% of the copper can be leached by ferric chloride ...
02-01-2021· The ferric chloride leaching process was originally described by the Bureau of Mines in 1971. As the result of additional research, improvements in method:, for recovering copper and sulfur and for regenerating the ferric chloride leach solution have been incorporated in the process and have been reported by the Bureau of Mines in 1975.
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.
ferric chloride leaching of copper from chalcopyrite. ferric chloride leaching of copper from chalcopyrite by Kealeboga Busang and Dr Colin Poole (Project Supervisor), School of Process, Environmental and Materials .... Get Price Here !
09-11-2019· Ferric Chloride Leaching Of Copper From Chalcopyrite. The ferric ion consumption rates i., chemical leaching rates calculated from the on-line redox potential undulations matched well with the copper release rates obtained from copper analyses, showing that approximately four moles of ferric ions were consumed.
01-03-2008· The effect of agitation on the leaching of chalcopyrite concentrate in ferric chloride in presence and absence of cupric chloride (C FeCl3: 0.5 M, T = 90 °C, < 25 µm). Similarly, the amount sulphate sulphur measured in the leaching solution was found to have the same trend as for the copper recovered as shown in Fig. 10 .
03-09-2020· Leaching of chalcopyrite with ferric ion. Part I: 01-08-2008 Chronologically, Traill and McClelland (1926) were the first to study the dissolution of chalcopyrite with concentrated ferric chloride (70 g/L) at high temperature (95 °C); they obtained a copper yield of 90% after 5 h of leaching and only 60–70% of Fe, probably because it hydrolysed and precipitated during the process.
Copper leaching from chalcopyrite concentrate in . 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
The Leaching of Chalcopyrite in Ferric Chloride and Ferric ... 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).
18-10-2019· This makes the dissolution more beneficial in cupric chloride solutions compared to ferric chloride solutions [43–45]. It has also been revealed that the addition of cupric chloride to ferric chloride leaching helps chalcopyrite dissolution [46]. The capability of chloride …
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 (vs. SHE) to 600 mV (vs. SHE ...
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 sulphide leaching options as alternatives to the more conventional pyrometallurgical processing route of copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of mineralogy
01-12-2007· 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. Chloride leaching with copper (II) as oxidant offers significant advantages for copper including increased solubility and increased rates ...
22-01-2019· Extractions of copper zinc and silver were higher than those obtained in bench-scale research in which better control of leaching time was possible 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.
Many chalcopyrite leaching studies have been performed with leachants such as ferric sulfate [4–7], ferric chloride [7,8], sodium nitrate-sulfuric acid [9], hydrochloric acid [10], and sodium chloride-sulfuric acid [11], among others [10]. The slow copper from chalcopyrite dissolution has been attributed to …
In addition numerous studies showed that leaching of chalcopyrite in chloride media results in higher copper extractions than in sulfate media 162324 The main reasons are the formation of chloride complexes which change the electrochemical behavior of chalcopyrite passivation andor the higher porosity of the mineral surface 81625. Details