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Solvent Extraction Stripping Methods 911 Metallurgist

25/01/2018· Copper ore Leachate Precipitation of Cu by hydrogen pressure stripping is reported to be a heterogeneous, autocatalytic reaction, chemically controlled with an activation energy (Ea) of about 113 kJ/mole (Ea >21 kJ/mole; <21 kJ/mole = diffusion controlled) (Chalk, 1959) (Li, 1987).

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Copper Recovery by Solvent Extraction Techniques

02/02/2017· In the early 1960’s General Mills Chemicals, Inc. developed a solvent designated LIX 63, for the extraction of copper from splutions of pH greater than 4.0. It was thus very suitable for treating the product from the ammoniacal leaching of copper.

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Copper recovery using leach/solvent extraction

leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could be produced occurred to the Minerals Group of General Mills in the early 1960s. This simple, elegant idea has resulted in a technology by which about 2.2 million tonnes of high quality copper cathode was produced in year 2000. The growth of this technology is traced over time with

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Solvent extraction and stripping of copper in a Y-Y type

01/10/2018· The solvent extraction and stripping of copper has been performed in a Y-Y type microchannel reactor. Effects of residence time, aqueous phase pH, and concentration of extractant on the extent of extraction were investigated and the overall volumetric mass transfer coefficients (K L α) were calculated to evaluate mass transfer characteristics. Effects of Cu 2+ concentration in the loaded

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SX Solvent Extraction Process Principles Theory

01/02/2017· Stripping isotherm data is generated in a similar fashion by equilibrating the stripping aqueous phase (S.E.), in this instance a typical copper electrowinning tankhouse electrolyte containing -30 g/I Cu and 170 g/I H2SO4, with copper loaded organic (L.O.) at various O/A ratios (Table II, Figure 6).

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GROWING ROLE OF SOLVENT EXTRACTION IN COPPER ORES

Growing role of solvent extraction in copper ores processing 31 • solvent extraction, in which the aqueous pregnant leach solution (PLS) is vig-orously mixed with an organic solvent, selectively recovers copper from PLS, being acidic or ammonia solution. The organic solvent is then separated and the copper stripped from it with a fresh acidic solution to produce a highly concen-trated

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AN INDUSTRIAL COPPER SOLVENT EXTRACTION PROCESS

Extraction Stripping LO BO PLS LE Raff RE Fig. 1. General flow diagram of the copper solvent extraction process. The copper transfer between the aqueous and organic phases takes place in mixers and the phases are separated in settlers. The equipment used for the solvent extraction process varies considerably. For

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Solvent extraction and stripping of copper in a Y-Y type

01/10/2018· The solvent extraction and stripping of copper has been performed in a Y-Y type microchannel reactor. Effects of residence time, aqueous phase pH, and concentration of extractant on the extent of extraction were investigated and the overall volumetric mass transfer coefficients (K L α) were calculated to evaluate mass transfer characteristics. Effects of Cu 2+ concentration in the loaded

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Copper Mining and Extraction: Oxide Ores

Most of the copper ores mined today are oxide or sulfide ores. Extraction of sulfide ores is covered in more detail in During the initial phase an organic solvent is used to recover copper ions contained in the pregnant leach solution, exchanging them with hydrogen ions in the acid. The final phase of the solvent extraction process employs a strong acid to strip the copper from the organic

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Copper recovery using leach/solvent extraction

leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could be produced occurred to the Minerals Group of General Mills in the early 1960s. This simple, elegant idea has resulted in a technology by which about 2.2 million tonnes of high quality copper cathode was produced in year 2000. The growth of this technology is traced over time with

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copper extraction and purification chemguide

Extracting copper from other ores. Copper can be extracted from non-sulphide ores by a different process involving three separate stages: Reaction of the ore (over quite a long time and on a huge scale) with a dilute acid such as dilute sulphuric acid to produce a very dilute copper(II) sulphate solution. Concentration of the copper(II) sulphate solution by solvent extraction. The very dilute

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Solvent extraction of copper from high concentration

under evaluation for the Konkola Deeps project in Zambia and for a copper-gold ore deposit. The process flowsheets involve copper dissolution from the concentrate by pressure leaching in sulphuric acid, followed by purification of the leach liquor by solvent extraction, and metal recovery by electrowinning. The autoclave discharge liquors contain 50 to 90 g/l Cu and, under appropriate

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SX Solvent Extraction Process Principles Theory

01/02/2017· Two stages of stripping will give a stripped organic of 1.12 g/I Cu and result in a net copper transfer for the organic (the difference between the loaded and stripped organic) of about 2.78 g/I Cu, while one stage of stripping gives a copper net transfer of about 2.13 g/I Cu. Because of the difference in net copper transfer, a one strip stage circuit requires a reagent concentration about 1.3

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Solvent extraction: the coordination chemistry behind

26/07/2013· Scheme 1 The sequence of reactions and overall materials balance for copper recovery from oxide ores by the leach/solvent extraction/electrowinning process. 12: The suitability of the phenolic oxime reagents in these operations arises from their coordination chemistry. They are strong enough extractants (pH 1/2 < 1.0, see Fig. 4) to load copper from aqueous leach solutions that are

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US4039405A Leaching copper ores and solvent extraction

This invention relates to a process whereby recovery of copper from copper ores using leaching and solvent extraction techniques can be increased. The process generally comprises leaching to obtain a pregnant leach liquor, washing ore residues with an extra quantity of water to obtain extra dissolved copper values, recovering said copper values, combining the extra wash water with the pregnant

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Copper extraction Wikipedia

As with oxide ores, solvent extraction and electrowinning technologies are used to recover the copper from the pregnant leach solution. Supergene sulfide ores rich in native copper minerals are refractory to treatment with sulfuric acid leaching on all practicable time scales, and the dense metal particles do not react with froth flotation media. Typically, if native copper is a minor part of

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How Hydrometallurgy and the SX/EW Process Made Copper

Beginning in the mid 1980s a new technology, commonly known as the leach-solvent extraction-electrowinning process or, SX/EW Process, was widely adopted. This new copper technology utilizes smelter acid to produce copper from oxidized ores and mine wastes. Today, worldwide, approximately 20% of all copper produced is produced by this is process

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Solvent extraction and stripping of copper in a Y-Y type

01/10/2018· The solvent extraction and stripping of copper has been performed in a Y-Y type microchannel reactor. Effects of residence time, aqueous phase pH, and concentration of extractant on the extent of extraction were investigated and the overall volumetric mass transfer coefficients (K L α) were calculated to evaluate mass transfer characteristics. Effects of Cu 2+ concentration in the loaded

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Solvent extraction and separation of copper from base

01/03/2016· Key words: copper; ionic liquid; extraction; stripping; separation 1 Introduction Copper has made vital contribution to sustaining and improving society from the dawn of civilization to till date. It is used in domestic, industrial and also high technology applications [1]. As a result, a lot of waste is also generated which contains copper along with other metals such as zinc, cadmium, nickel

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Solvent extraction: the coordination chemistry behind

26/07/2013· Scheme 1 The sequence of reactions and overall materials balance for copper recovery from oxide ores by the leach/solvent extraction/electrowinning process. 12: The suitability of the phenolic oxime reagents in these operations arises from their coordination chemistry. They are strong enough extractants (pH 1/2 < 1.0, see Fig. 4) to load copper from aqueous leach solutions that are

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AN INDUSTRIAL COPPER SOLVENT EXTRACTION PROCESS

Extraction Stripping LO BO PLS LE Raff RE Fig. 1. General flow diagram of the copper solvent extraction process. The copper transfer between the aqueous and organic phases takes place in mixers and the phases are separated in settlers. The equipment used for the solvent extraction process varies considerably. For

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Solvent Extraction of Copper: An Extractive Metallurgy

Background: Solvent Extraction of Copper Copper metal has traditionally been produced on a large scale by smelting sulfidic ores, and although well understood, this process can be costly in energy and capital terms.4 Since the 1960s, an alternative process involving solvent extraction has been employed to concentrate and purify copper ore.4

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copper extraction and purification chemguide

Extracting copper from other ores. Copper can be extracted from non-sulphide ores by a different process involving three separate stages: Reaction of the ore (over quite a long time and on a huge scale) with a dilute acid such as dilute sulphuric acid to produce a very dilute copper(II) sulphate solution. Concentration of the copper(II) sulphate solution by solvent extraction. The very dilute

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Solvent extraction of copper from an industrial sulfate

Stripping of copper from the loaded organic phase was also conducted, and it was found that ~99.38% copper could be recovered using 165 g/L H 2 SO 4 at a 2:1 A:O phase ratio after 5 minutes stripping. Keywords. Copper extraction; Pregnant leach solution; Solvent extraction; Stripping; Chemorex CP-150; Main Subjects. Mineral Processing

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Copper Solvent Extraction: Status, Operating Practices and

Although the first large-scale application of copper recovery by solvent extraction (SX) took place in Zambia in the early 1970s, it is only in the last decade that this technology has become widely employed in this part of the world and is now a mainstay unit operation in most copper hydrometallurgical flowsheets. The mineralogy of the ores in the African Copper Belt, and hence the

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Copper Ore Hydrometallurgy and Pressure Leaching-Copper-

Copper hydrometallurgy is a branch of metallurgy method to extract copper directly from those difficult-to-concentrate copper oxide ore. Traditional copper hydrometallurgy process typically consists of atmospheric leaching, solvent extraction (SX) and electro-winning (EW). It can produce either copper cathode or copper sulphate crystal. Hydrometallurgy is advantageous in flexible capacity

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Global survey of copper solvent extraction operations and

Global practice in copper solvent extraction is reviewed, based on individual plant operating data for 2012. Trends in feed and electrolyte compositions and flow rates, and extractant and diluent selection, together with their impact on copper recovery and reagent utilisation, are reviewed. Optimisation of copper transfer and copper production by changing circuit configurations with changing