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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

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  • Pyrite Leaching Behaviour under CESL Process Conditions

    the roles of particle size, oxygen partial pressure, pulp density and copper Cu addition on the kinetics of pyrite leaching. The present work focuses more on the stoichiometry of the pyrite leaching reaction under conditions specific to CESLs mixed sulphate-chloride system operating at 150C.

  • WO2007134343A2 - 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 chloridesulphate 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.

  • Efficient Synchronous Extraction of Nickel, Copper,

    After water-leaching the Ni, Cu, and Co in the form of sulfate dissolve into the solution, but the Fe with the form of ferric oxides remain in the leaching residue, thereby achieving efficient ...

  • ELECTRO-HYDROMETALLURGY OF CIULCOYYRITES AN

    Conditions for ferric chloride leaching process have been standardized involving the recovery of cop- per by galvanic cementation as well as electrolysis in diaphragm cell. Key words Chalcopyritea, electrohydrometallurgy. ferric chloride leaching A 11 the copper produced in

  • A Review on Novel Techniques for Chalcopyrite Ore

    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 complexes are formed during the leaching process where the cupric ion is considered as a string ...

  • Chloridepromoted leaching of chalcopyrite

    The effects of chloride ions on chalcopyrite leaching by biologicallyproduced ferric sulfate solution and on the ironoxidizing culture were determined. Chloride ions significantly increased chalcop...

  • PDF LEACHING KINETICS OF COPPER FROM

    Treating chalcopyrite flotation concentrates by hydrometallurgical techniques seems to be the most convenient method for leaching copper due to concerns over air pollution and regulations regarding the emission of sulfur dioxide that result from smelting. In this study, the leaching recovery-time trajectories of bulk chalcopyrite concentrate obtained from a flotation plant in the Kastamonu ...

  • The kinetics of the dissolution of chalcopyrite in ...

    Chalcopyrite from different sources appears to dissolve at approximately the same rate which is largely independent of the iron and copper ion concentrations, the acidity and chloride ion concentration but depends in some cases on the presence of additives such as fine pyrite or silver ions.ud ud Based on the results of these leaching ...

  • Full text of Economic Evaluation of a Process for

    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.

  • The dissolution of chalcopyrite in chloride solutions ...

    chloride system were a result of catalysis of the reaction by cupric ions and that ferric chloride leaching is in reality cupric chloride leaching. Even though temperature is one of the most important parameters in the kinetics of the leaching of chalcopyrite in chloride media, it has been difficult to determine its effect accurately Dutrizac ...

  • Ultrasonic-assisted leaching kinetics in aqueous FeCl 3 ...

    Ultrasonic-assisted leaching kinetics for the recovery of copper from poorly soluble chalcopyrite 1749 Korean J. Chem. Eng.Vol. 34, No. 6 1. Basic Leaching In the basic leaching process, copper is reacted with FeCl 3 as the reactant in an aqueous solution of HCl. The reaction is repre-sented by Eq. 1. The solid sulfur So produced from the ...

  • Recovery of Copper, Iron, and Sulfur from

    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 CuFeS2 3FeCl3 CuCl 4FeCl2 2S.

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

    007. Elemental sulfur formed during the leaching of chalcopyrite with ferric chloride is also more porous than that formed with ferric sulfate, thus the leaching rate is an order of magnitude larger in the former Majima et al., 1985. Peters 1976a reported that chalcopyrite

  • 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. Chloride leaching offers significant advantages ...

  • Leaching of chalcopyrite in cupric chloride solution

    Keywords Chalcopyrite, leaching of chalcopyrite, cupric chloride, sodium chloride, HydroCopperTM ABSTRACT Outokumpu HydroCopperTM technology was developed by Outokumpu Research. It is a novel copper production method based on the efficient leaching properties of cupric chloride solutions.

  • Solvometallurgical process for extraction of copper

    Extraction of copper from sufidic ores, either by pyrometallurgy or hydrometallurgy, has various limitations. In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals chalcopyrite, bornite, chalcocite and digenite was developed by using an organic lixiviant FeCl 3 as oxidizing agent and ethylene glycol EG as organic solvent.

  • Kinetic Study of Chalcopyrite Leaching with Iron III ...

    Ferric oxidant have proved to be the most efficient oxidant for leaching chalcopyrite under oxidizing conditions in the presence of chloride, several kinetical studies were performed looking to identify the response under specific conditions with industrial implementation porpoises Table 1, seems to be a consensus on the determination of the ...

  • Leaching of Copper Sulphides - SAIMM

    oxidation, ferric sulphate leaching and copper chloride leaching. The effect of mineralogy on the choice of processing technology is discussed as well as some of the unit processes used. Additionally, possible benefits that a hydrometallurgical process may offer over an ... bornite and chalcopyrite Cu 5 FeS 4 and CuFeS 2, respectively as well ...

  • US8070851B2 - Chloride heap leaching - Google Patents

    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 chloridesulphate solution in the presence of dissolved oxygen and maintaining the minerals surface potential within ...

  • Cu Leaching Using Regenerated Ferric Sulphate

    copper sulphide minerals are normally less refractory than chalcopyrite and as such appear more suitable to hydrometallurgical processes. Acidified ferric sulphate is without a doubt the most common lixiviant for . secondary copper minerals 1,2, and, even under autoclave conditions 3, it is believed that oxidation by ferric remains

  • 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.

  • 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 FeCl3. The leaching rate of chalcopyrite exhibits a half order dependency on the FeCl3 concentration, whereas it is independent of the FeCl2 concentration. The mixed potential of chalcopyrite exhibits a 72 mV decade1 dependency upon FeCl3 ...