• Ferric chloride leaching of chalcopyrite: Synergetic

    This work presents a study of the leaching of chalcopyrite in acidic ferric chloride. Two chalcopyrite samples (natural chalcopyrite crystal and chalcopyrite concentrate) were leached under different conditions. The effects of stirring speed and temperature were investigated. It was found that agitation had a negative effect on copper recovery

    Chloride leaching of chalcopyrite ScienceDirect

    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

    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 °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 chalcopyrite: Synergetic

    This work presents a study of the leaching of chalcopyrite in acidic ferric chloride. Two chalcopyrite samples (natural chalcopyrite crystal and chalcopyrite concentrate) were leached under different conditions. The effects of stirring speed and temperature were investigated. It was found that agitation had a negative effect on copper recovery

    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

    Leaching of chalcopyrite with acidified ferric chloride

    Pergamon Minerals Engineering, Vol. 8, No. 10, pp. 1125-1134, 1995 Elsevier Science Ltd Printed in Great Britain 0892-6875(95)00077-1 0892-6875/95 $9.50+0.00 LEACHING OF CHALCOPYRITE WITH ACIDIFIED FERRIC CHLORIDE AND CARBON TETRACHLORIDE ADDITION T. HAVLfKand R. KAMMELt Department of Nonferrous Metals, Faculty of Metallurgy, Technical University of Ko~ice,

    Cupric Chloride Leaching of Chalcopyrite SpringerLink

    11/12/2014· Abstract. In a strong chloride solution the predominant cuprous, cupric, ferrous, and ferric chloride complexes are CuCl 3 −2, CuCl +, CuCl 2, FeCl 2, and FeCl 2 + respectively.. The probable dissolution reaction for chalcopyrite in cupric chloride solution is CuFeS 2 + 3CuCl + + 11Cl −2 = 4CuCl 3 −2 + FeCl 2 + 2S The standard free energy change for this reaction at 25°C and unit

    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

    The role of sodium chloride on surface properties of

    The role of sodium chloride on surface properties of chalcopyrite leached with ferric sulphate reduced the total iron concentration during leaching, copper extractions as high as 91% were accomplished as compared to 45% copper extraction in the absence of NaCl. It is suggested that sodium chloride reduces chalcopyrite passivation and complexes Cu (I) ions adding a second redox couple

    Copper leaching from chalcopyrite concentrates

    Abstract. Chalcopyrite (CuFeS 2) 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.

    Leaching of chalcopyrite concentrate with ferric chloride

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    The leaching of chalcopyrite with ferric sulfate

    The leaching kinetics of natural chalcopyrite crystals with ferric sulfate was studied. The morphology of the leached chalcopyrite and the electrochemical properties of chalcopyrite electrodes also were investigated. The leaching of chalcopyrite showed parabolic-like kinetics initially and then showed linear kinetics. In the initial stage, a

    Improvements in Ferric Chloride Leaching of

    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

    Recovery of Copper, Iron, and Sulfur from Chalcopyrite

    28/12/2015· Abstract. 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 hydro-metallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS 2 + 3FeCl 3 → CuCl + 4FeCl 2 + 2S.

    Chloride leaching of chalcopyrite Request PDF

    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

    Electrogenerative leaching of chalcopyrite with ferric

    Download Citation Electrogenerative leaching of chalcopyrite with ferric chloride In order to expand the applying field of electrogenerative leaching, in this work the electro-generate

    An Investigation into the Ferric Leaching of Chalcopyrite

    chalcopyrite ferric leach experiments were conducted to obtain the redox potential range where chalcopyrite leaching occurs. The rate of chalcopyrite leaching in a sulfate media decreases with time due to the formation of a passivating layer. This has been described by many researchers as

    A Review on Novel Techniques for Chalcopyrite Ore

    The FeOOH formation in addition to the elemental sulphur favours chalcopyrite dissolution. Al-Harahsheh (2008) used ferric chloride leaching of copper from chalcopyrite. The effect of stirring speed and temperature on chalcopyrite leaching were investigated. Agitation was found to have a negative effect on cupric ion, the fact that cupric

    Leaching of Copper Sulphides

    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

    Chalcopyrite Leaching in Acidic Chloride Solution without

    Abstract: Chalcopyrite leaching in acidic chloride solution with-out sulphates. The effect of dissolved oxygen and ferrous/ferric/cu-pric ions in solution on the leaching behavior of chalcopyrite and the phenomenology of the passivating layer formation on the chalcopyrite surface in an aqueous acidic chlorinated medium with dissolved oxy-

    Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous

    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

    Ferric Chloride Leaching

    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 sphalerite

    (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

    Ferric chloride leaching of mechanically activated

    Read "Ferric chloride leaching of mechanically activated chalcopyrite, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

    CHALCOPYRITE DISSOLUTION IN CUPRIC CHLORIDE SOLUTIONS

    Chloride solutions have become of great interest, having high leaching kinetics and no passivation of sulfide minerals. This thesis presents an investigation of chalcopyrite (CuFeS2) dissolution in cupric chloride solutions. Firstly, the formation and composition of reaction product layers formed on chalcopyrite were studied.

    Recover Copper by Leaching Sulfidation-Partitioned

    Ferric Chloride Leaching Because of the demonstrated efficacy of FeCl3 as a leachant for CuFeS2, the most stable of the copper sulfides (because of its face-centered tetragonal structure), FeCl3 was a likely candidate to selectively remove Cu from the simple sulfides produced as reaction products during the sulfidization of CuFeS2 concentrate.

    Leaching of chalcopyrite concentrate with ferric

    Read "Leaching of chalcopyrite concentrate with ferric chloride, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

    Influence of Ferric and Ferrous Iron on Chemical and

    chemical leaching of chalcopyrite was increased 4-fold in the presence of 0.1 M ferrous iron compared with 0.1 M ferric iron. Cordoba . et al. [8] studied the influence of ferric iron on chalcopyrite dissolution at low and high solution potentials and found that although ferric iron was responsible for the oxidation of chalcopyrite, ferrous

    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

    Chloride leaching of chalcopyrite, Hydrometallurgy 10

    01/12/2007· Chloride leaching of chalcopyrite Chloride leaching of chalcopyrite Liddicoat, J.; Dreisinger, D. 2007-12-01 00:00:00 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

    ferricchloride leaching of copper from chalcopyrite

    Chloride leaching of chalcopyrite Request PDF. 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

    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

    Redox potential dependence of chalcopyrite leaching in

    chalcopyrite leaching in acidic ferric chloride solutions and to develop a method to predict E op. For this, effects of solution compositions and temperature on the redox potential dependence of chalcopyrite leaching in acidic chloride solutions containing ferric ions were investigated. Electrochemical study using a chalcopyrite

    Leaching of Chalcopyrite in Acidified Nitrate Using

    The authors determined the effect of nitrate, ferric nitrate, ferric chloride and ferric sulfate on copper extraction. A mixed chloride-nitrate system was favorable for extracting copper from chalcopyrite while the presence of ferric chloride was also beneficial.

    ferric chloride leaching of copper from chalcopyrite

    ferric chloride leaching of copper from chalcopyrite. Cu Leaching Using Regenerated Ferric Sulphate,for producing high quality copper from chalcopyrite concentrates have,chloride, has been shown to,Effect of . Chat Online; Study of integrated leaching and electrowinning of copper,Study of integrated leaching and electrowinning of copper from chalcopyrite ore using chloride media

    The role of sodium chloride on surface DeepDyve

    01/07/2007· The role of sodium chloride on surface properties of chalcopyrite leached with ferric sulphate The role of sodium chloride on surface properties of chalcopyrite leached with ferric sulphate Carneiro, M.F.C.; Leão, V.A. 2007-07-01 00:00:00 Leaching of chalcopyrite in oxidizing conditions usually results in low copper extraction due to mineral passivation.

    Full text of "Economic Evaluation of a Process for Ferric

    Equipment cost summary, sulfur recovery 19 ECONOMIC EVALUATION OF A PROCESS FOR FERRIC CHLORIDE LEACHING OF CHALCOPYRITE CONCENTRATE by Thomas A. Phillips 1 ABSTRACT The Bureau of Mines presents an economic evaluation of its process for the ferric chloride leaching of chalcopyrite concentrate. In this process, chalcopyrite concentrate is leached with ferric chloride solution to extract copper

    Ferric Chloride Leaching

    The galena concentrate used in ferric chloride leaching was a concentrate from southeastern Missouri. Analysis of the concentrate is shown in Table 1. The lead concentrate contained primarily galena and small amounts of chalcopyrite, sphalerite, marcasite, and siegenite. The gangue material contained a small concentration of dolomite.

    US3957602A Recovery of copper from chalcopyrite

    Copper is recovered from chalcopyrite by means of a pollution-free hydrometallurgical process which entails leaching and converting the chalcopyrite with copper sulfate in order to produce an insoluble copper sulfide, a soluble iron sulfate and sulfuric acid. A secondary leach is then conducted in order to react the copper sulfide with oxygen in the presence of a jarosite-forming cation to

 

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