بيت /Ferric Chloride Leaching Of Copper From Chalcopyrite
A process for recovering copper from chalcopyrite is disclosed. The process includes oxidising sulphur in chalcopyrite with a solution under predetermined contact conditions and thereby releasing at least part of the copper in the chalcopyrite into the solution as copper ions. The process includes a subsequent step of reducing sulphur in a solid product from step (a) to a minus two, ie ...
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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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Dec 11, 2014 · Jones and E. Peters, "The Leaching of Chalcopyrite with Ferric Sulphate and Ferric Chloride," in Extractive Metallurgy of Copper, Vol. II, edited by Yannopoulos and Agarwal, TMSAIME, 1976, p. 633–653. Google Scholar Download references
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Autoclave oxidative leaching is one of the most promising hydrometallurgical approaches for copper suplhide materials processing. In previous studies [2–4], the possibility of an efficient autoclave treatment of chalcopyrite concentrate was confirmed. The concentrate has the following chemical composition, %: Cu, Zn, S, Fe, Pb, Ni, SiO2 [1].
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W. Ding; "Leaching behavior of complex copper sulfide concentration with ferric chloride by microwave irradiation"; Rare Metals, 16 [2] 152155 (1997). R. Padilla, D. Lovera and Ruiz; "Leaching of chalcopyrite in CuCl2NaClO2 system"; EPD Congress 1997, 167177 (1997).
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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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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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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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Differential bioleaching of copper by mesophilic and moderately thermophilic acidophilic consortium enriched from same copper mine water sample By Prof. Lala Behari Sukla Bacterial and chemical leaching of chalcopyrite concentrates as affected by the redox potential and ferric.
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For copper, the extractions were higher in chloride leaching (75 – 100 %) whereas cyanide could dissolve 50 % of copper. Extraction of nickel and zinc were slightly higher in ferric chloride leaching compared to cupric chloride leaching, but cobalt extraction was similar in both chloride leaching .
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Jan 01, 2019 · Extensive leaching studies have been carried out to leach primary copper sulfides (chalcopyrite), including biological and chemical, using a variety of oxidants and additives to enhance copper recovery. Watling (2013) reviewed acidchlorideoxidizing agents with chalcopyrite.
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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.
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As a part of ongoing research into the sulfidation partitioning of selected complex minerals, the Bureau of Mines conducted research designed to selectively recover Cu from sulfidized chalcopyrite (CuFeS2). Ferric chloride (FeCl3) solutions leached >90 pct of the Cu and <20 pct (sometimes <10 pct) of the Fe in the sulfidized concentrates.
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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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Smelting of copper concentrates results in the discharge of millions of tons of SO, to the atmosphere each year. Because of increasing concern with air pollution, the Bureau of Mines has developed a hydrometallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS 2 + 3FeCl 3 > → CuCl + 4FeCl2 + 2S.
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This makes the dissolution more beneficial in cupric chloride solutions compared to ferric chloride solutions [43,44,45]. It has also been revealed that the addition of cupric chloride to ferric chloride leaching helps chalcopyrite dissolution . The capability of chloride ions to form complexes is crucial.
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Leaching of chalcopyrite with ferric ion. Part II: Effect of redox potential. Antonio Ballester. Related Papers. Leaching of chalcopyrite with ferric ion. Part I: General aspects ... THE KINETICS OF THE DISSOLUTION OF CHALCOPYRITE IN CHLORIDE MEDIA Lilian De Lourdes Velásquez Yévenes Metallurgical Engineer.
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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 ( jarosite). 1 In chloride media, the leaching rate is faster than that in sulfate media, due ...
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Jan 01, 2019 · We carried out leaching tests with a highly pure chalcocite sample in jacketed reactors under fully controlled pH and solution potential. The effect of chloride concentration, oxidant concentration, and temperature on copper extraction was quantified in both cupric and ferric chloride systems. In the ferric chloride system, increasing ferric ...
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Laboratory studies have been conducted on chloride leaching as a possible route for the simultaneous recovery of copper, zinc, and lead from an off grade and complex chalcopyrite concentrate (from Sikkim, India) associated with appreciable amounts of sphalerite, galena, and pyrite. The effects of temperature, concentration, and quantity of ferric chloride, stirring speed, and leaching time on ...
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