leaching parameters for copper concentrates

    RECOVERY OF COBALT AND NICKEL BY

    The traditional treatment of copper flotation sulphide concentrates by smelting, converting and electrorefining is becoming dominant in the world copper industry for Other leaching parameters were as follows: temperature = 90oC, s/l = 1:8, initial H 2 SO 4 concentration = 50 g/dm

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    Linear Programming Models of Copper Leach and

    Linear Programming Models of Copper Leach and Solvent Extraction Plants w. P. C. extract copper from OlUde concentrates. In 1970 it was parameters and of alternative ways in which the (wo hydrometallurgical plauts could be inte&tated.

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    Bioprocess for Leaching of Copper Concentrate

    The acid leaching under batch conditions at 50°C and pH 1.2 during 22 hours led to 40.6% of copper recovery from the concentrate. Subsequent ferric leaching of the acid leach residue at 80°C, pulp density 9%, initial concentration of Fe 3+ 30.7 g/L, and pH 1.21.3 during 7 hours increased the total copper recovery to 94.5%.

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    LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

    Abstract: Treating chalcopyrite flotation concentrates by hydrometallurgical techniques seems to be the most convenient method for leaching copper due to concerns over

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    Linear Programming Models of Copper Leach and

    Linear Programming Models of Copper Leach and Solvent Extraction Plants w. P. C. extract copper from OlUde concentrates. In 1970 it was the leach plant solutions and copper recovered from dilute filtrates.

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    COPPER EXTRACTION BY BIO LEACHING OF

    The bio assisted leaching of flotation concentrate, produced in a copper mining in Brazil, was initiate with the use of micro organisms present in the acid mining drainage collected directly in the aforementioned copper mine, besides an strain of Acidithiobacillus ferrooxidans bacteria.

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    Accelerated leaching of gold, silver and copper

    to leach copper, silver and gold (and a few other base/precious metals) from their ores, concentrates, tailings, wastes and process intermediates. It is the only known benign alkaline leach system which allows the

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    Pressure Leaching of Copper Concentrates

    Pressure Leaching of Copper Concentrates John O. Marsden Senior Vice President Technology & Product Development Phelps Dodge copper pressure leaching developments July 2003 All design parameters met, steady state operation Four years from first testing to commercial demonstration

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    Optimization of parameters affecting recovery of

    Optimization of parameters affecting recovery of copper from their role in leaching copper sulfide [13]. of metals from low grade stockpiles, concentrates and scrap industries were also used. The practical application of

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    How and why do we produce gold and copper

    How and why do we produce gold and copper concentrates? 17th March 2017 The export of mineral sands, or in our case, the sale of gold and copper concentrate, is an emotive subject in every country with free gold and then cyanide to leach the finer disseminated gold. Gold bars are smelted at both mines.

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    A Studies in leaching of sulphide concentrates of

    Studies in leaching of sulphide concentrates of copper and nickel from indigenous source M. TOTLANI and J . BALACHANDRA AMONG the several metallurgical processes for re covery of nickel from sulphide ores, hydrometal lurg1cal process of pressure leaching with ammonia in the presence of air or oxygen has been one of the

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    COPPER EXTRACTION BY BIO LEACHING OF

    COPPER EXTRACTION BY BIO LEACHING OF FLOTATION COPPER SULPHIDE CONCENTRATES Renata B. Lima, Luis G.S. Sobral, Debora M. Oliveira, Priscila G. Xavier, Judith L.S. Lemos,

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    US8795612B2 Leaching process for copper concentrates

    US8795612B2 Leaching process for copper concentrates containing chalcopyrite Google Patents

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    Copper leaching from chalcopyrite concentrates

    Chalcopyrite (CuFeS 2) is one of the most abundant copper bearing minerals, which accounts for approximately 70 percent of the worlds known copper reserves. For more than 30 years, a significant number of processes have been developed to leach copper from chalcopyrite concentrates. These

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    Leaching of Copper Sulphides SAIMM

    complex and will vary from case to case according to the mineralogy of the concentrate fed to the autoclave. However, simplified representations of the leaching of chalcopyrite (CuFeS The final CLC leaching parameters defined through test work, process design, optimisation required for the copper leaching process (Dreisinger, 2006).

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    Thermophilic Bioheap Leaching of Chalcopyrite Concentrates

    Thermophilic Bioheap Leaching of Chalcopyrite Concentrates T.J. Harvey1*, N. Holder2, T. Stanek2 1 GeoBiotics, focusing on the heap design parameters and additional copper concentrates including enargite. heap leaching and biooxidation. Copper bearing sulphide minerals are

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    US7491372B2 Procedure to leach copper concentrates

    A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high concentration of ions in the liquid phase of the paste which react with copper ores and forms a series of soluble salts. The salts are extracted by a

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    Copper and cyanide recovery from barren leach

    Copper and cyanide recovery from barren leach precipitates the copper as a saleable copper sulphide concentrate. With the copper removed, the process with respect to key operating parameters such as copper recovery, cyanide regeneration,

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    Optimization of the leaching conditions of chalcopyrite

    Optimization of the leaching conditions of chalcopyrite concentrate using ammonium persulfate in an autoclave system experiments were performed together with constant parameters including a leaching time of 180 min, stirring speed of 500 rpm, and liquid/solution ratio of 11 g/L. Brewer R.E.Copper concentrate pressure leaching

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    US7491372B2 Procedure to leach copper concentrates

    A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high concentration of ions in the liquid phase of the paste which react with copper ores and forms a series of soluble salts. The salts are extracted by a simple wash.

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    Simultaneous Extraction of Copper and Iron from

    Simultaneous Extraction of Copper and Iron from Chalcopyrite Concentrates in Hydrochloric Acid Media: Effect of Additives For each experiment the desired amount of copper concentrate various leaching parameters such as acid concentration, effect of sodium chloride and temperature

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    Bioelectrochemical Leaching of Copper Sulfide Minerals

    The objective of this study is to improve the understanding of copper sulfides dissolution and to use this knowledge for optimization of process parameters for commercial application of electrochemical bioleaching of chalcopyrite concentrates in stirred

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    Leaching process for copper concentrates containing

    Aug 05, 2014· It is known in the copper leaching art that pyrite (FeS 2) may be used as a catalyst in the chemical leaching of copper from chalcopyrite concentrates in an acidic sulfate leach solution. Dixon et al., US 2005/0269208 A1, published Dec. 8, 2005, discloses a process for leaching copper from chalcopyrite concentrates using

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    Role of galvanic interaction in selective leaching of

    Selective leaching of nickel from the copper flotation concentrate was possible due to the development of galvanic couple between copper containing chalcopyrititic phase and nickel containing pentlandite.

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    Agitated Tank Bioleaching MINTEK MINTEK

    This has enabled Mintek to adapt microbial cultures and establish operating parameters for concentrates with widely different mineralogical compositions. A particular achievement has been identifying the requirements for bioleaching chalcopyrite from complex or impure copper concentrates with acceptable kinetics. Secondary copper

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    A potential method for arsenic removal from copper

    Selective alkaline oxidizing leaching of enargite in hypochlorite media can be used for arsenic removal from copper concentrates. Leaching reaction described could be the basis of a new process for removing As from copper concentrates and can be used on a commercial scale.

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    GOLD RECOVERY FROM COPPER GOLD GRAVITY

    recoveries from gravity concentrates by replacing tabling with a fully automatic intensive cyanidation and to understand the effects of major operating parameters, rather than to optimise the process for any of copper leaching and an acceleration of gold leaching

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    Heap leaching

    Heap leaching is an industrial mining process to extract precious The relationship between the aforementioned parameters and the ore preparation practices (mining, crushing, agglomeration, curing, and method of placement). The method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead

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    (PDF) LEACHING OF CHALCOPYRITE CONCENTRATE

    The leaching conditions of chalcopyrite (CuFeS 2) concentrate taken from Koyulhisar (Sivas, Turkey) in a nitric acid medium were investigated by studying the effects of its leaching parameters

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    Pressure Leaching of Copper Concentrates

    Pressure Leaching of Copper Concentrates John O. Marsden Commercial drivers for copper concentrate leaching July 2003 All design parameters met, steady state operation Four years from first testing to commercial demonstration. 21 October 25th, 2004

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    Hydrometallurgical Production of Copper From

    Hydrometallurgical production of copper from flotation concentrates by J.R Cobble, C.E. Jordan, and DA. Rice. HYDROMETALLURGICAL PRODUCTION OF COPPER FROM FLOTATION CONCENTRATES By J. R. Cobble,1 C. E. Jordan,2 and D. A. Rice3 mill operating parameters on the leaching rate and energy

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    Copper Concentrates Cargo Handbook the world's largest

    Sulfide ores are moved to a concentrating stage, while oxide ores are routed to leaching tanks. The first commercial copper product, in an increasing chain of added value, is the copper concentrate, which main components are copper, iron and sulfide. Metal surfaces contaminated with copper concentrates can be cleaned by rust cleaner (32%

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    Chapter 6 Copper Production Technology

    Chapter 6 Copper Production Technology The last boomin technological innovation for the copper industry occurred in the first two dec-ades of this century, whenopen pit mining, flo- tation concentration,and the reverberatory

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    A potential method for arsenic removal from copper

    This paper investigates a potential method for arsenic removal from copper concentrates using hypochlorite leaching. The problems concerning pyrometallurgical processing of copper concentrates

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    Hydrometallurgical considerations in processing arsenic

    Hydrometallurgical considerations in processing arsenic-rich copper concentrates *Henry Salomon-de-Friedberg1 and Keith Mayhew1, Adalbert Lossin2 and Vanya Omaynikova2 would include high copper extraction during leaching and arsenic deportment to a stable residue.

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    Selective leaching of penalty elements from copper

    The operating parameters used in the Sunshine process, Two main drawbacks have been identified with hypochlorite leaching of copper concentrates: poor selectivity of the reagent for As (i.e. minerals which do not contain As also react to an appreciable extent) and high reagent consumption for effective extraction of As. Applications of

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    Thermodynamics of Reactions during Nitric Acid

    The acquired thermodynamic characteri stics of leaching of the copper concentrate with nitric acid can be used when selecting the production parameters for processing the copper concentrates. Keywords : Sulfide concentrates, nitric acid leaching, ther modynamic characteristics, production parameters.

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    SOLVENT EXTRACTION IN HYDROMETALLURGICAL

    PROCESSING OF POLISH COPPER CONCENTRATES Received June 15, 2010; reviewed; accepted July 30, 2010 leaching medium, its type and concentration and other leaching parameters. The composition of PLS is diversified and differ in pH, Cu(II) and other valuable metals

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