• JP2014501849A

    A copper oxide ore leaching method that does not utilize sulfuric acid, which comprises an aqueous solution of tricarboxylic acid mixed in water (the acidity in the mixture varies between pH 1.0 and 5.0). A step of impregnating the copper ore with an organic non-polluting leachate, a step of obtaining copper citrate, and optionally washing the impregnated copper ore again with an organic non ...

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  • Oxide Sulfide Copper Ores Leaching

     · The Chemistry of Leaching Copper Ores. A mineralogical examination of the 3 ore types revealed a copper mineralogy which can be divided into 3 separate mineral groups: 1. the oxide copper minerals chrysocolla and malachite, 2. chalcocite and 3. chalcopyrite. Minor amounts of covellite and brochantite (copper sulfate) were also detected.

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  • Leaching of Copper from Cuprous Oxide in Aerated Sulfuric Acid

    The leaching behavior of copper from Cu 2 O in H 2 SO 4 solution was investigated to establish the leaching process for cathode powders produced by the recycling of waste printed circuit boards. When air was not introduced in sulfuric acid solution, the dissolution of copper from Cu 2 O was inhibited by the formation of elemental copper (Cu 0).The dissociated cuprous ions (Cu +) transformed ...

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  • Copper Oxide Ore Leaching Ability and Cementation Behavior ...

    Oxide minerals as described formerly can be treated by the hydrometallurgy method that contains three main steps 1) Leaching, 2) Solvent Extraction (SX) and 3) Electrowinning (EW) [7] [9] [10] There are other methods to recover copper after leaching [5].

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  • Ammonia Leaching: A New Approach of Copper Industry in ...

     · Although copper oxide and pure copper were first used to recover copper due to high solubility in ammonia, later on ammonia leaching of sulfide ores was also considered. The common method was the use of oxide roasting at high temperatures to convert sulfides to oxides in order to facilitate dissolution in ammonia solutions [ 1 ].

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  • Copper Mining and Extraction: Oxide Ores

    Leaching Oxide Ores with Sulfuric Acid The flowchart above shows how the smelting process of sulfide ores produces sulfur dioxide, which is converted to sulfuric acid. The chart below shows how acid is used to leach out copper ions creating lakes of blue copper sulfate solution from which copper

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  • Recovery of Copper by Solution Mining Methods

    Recovery of Copper by Solution Mining Methods David F. Briggs Economic Geologist In-place leaching of rubblized and terraced walls of the Oxide pit at the Silver Bell mine, Pima County, Arizona (Satellite Photo from Google Earth - 12/20/2014)

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  • In-situ copper leaching is a proven technology

     · In the case of copper, the solution used is a weak sulphuric acid similar to that used for typical heap leaching of copper oxides. The pregnant leach solution is then processed at an Solvent ...

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  • Copper recovery using leach/solvent extraction ...

    copper from the leach solution, produced low quality copper cathode at relatively high cost. In 1968 the tonnage of high-grade oxide ores was decreasing and vat leaching was on the decline. The second process, heap and dump leaching of low-grade oxide and/or sulphide ore followed by precipitation of low quality copper from the leach solution on ...

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  • Arizona Department of Mines and Mineral Resources

     · leaching, if the mineralogic composition of the sample is not considered. Oxide copper minerals such as cuprite, dioptase and impure native copper will contribute to production under proper leaching conditions but do not report significantly to the standard types of oxide copper assay. Economically important

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  • Recovery of PGMs from an oxide ore by flotation and leaching

    (34.5% Pt and 7.1% Pd). The best leaching results of 48% Pt and 24.5% Pd were obtained using aqua regia solution though it is non-selective. Leaching of ROM ore is generally not preferable as it leads to high reagent consumptions. In this study it was postulated that leaching of low grade flotation concentrate would be preferred.

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  • Recovery prediction of copper oxide ore column leaching by ...

     · Key words: leaching; copper oxide ore; recovery; artificial neural network; genetic algorithm 1 Introduction Heap leaching is a hydrometallurgical method that is used to leach low grade minerals such as copper, gold, nickel and zinc. In this method, piles of crushed ore are irrigated with various chemical solutions to leach and extract valuable ...

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  • Copper extraction

    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.

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  • A-Z of Copper Ore Leaching

    • Leaching of copper sulphide concentrates • Agitated leaching of oxide ores • Heap Leaching Duration The course is presented over 7.5 hours, including breaks. For CPD recording purposes, please refer to your own regulator''s requirements as recognition of CPD hours may vary. Course Materials

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  • Copper heap leach development – not as easy as it looks ...

     · Copper heap leach development – not as easy as it looks. Heap leaching has become increasingly popular in the copper industry for treating oxide and …

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  • Leaching of Oxide Copper Ores by Addition of Weak Acid ...

    DOI: 10.3390/met10050627 Corpus ID: 219416928. Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters @inproceedings{Araya2020LeachingOO, title={Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters}, author={Giselle Araya and Norman Toro and Jonathan Castillo and D. Guzm{''a}n and A. Guzm{''a}n and P{''i}a C. Hern{''a}ndez and R. …

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  • Comparing Leaching of Different Copper Oxide Nanoparticles ...

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  • An investigation into the leaching behaviour of copper ...

     · While the dissolution rates of the copper oxide minerals are markedly slower than acid leaching, the selective dissolution of copper over acid-consuming gangue minerals shows much potential. It was shown through UV–Vis spectroscopy that dissolved copper is in the cupric state and forms a neutral copper-glycinate complex under alkaline conditions.

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  • Escondida Copper Mine

    Escondida Copper Mine - oxide leach expansion project. The Escondida Mine is located in the Atacama Desert, Chile. In 2012 it accounted for five per cent of global copper production and around 15 per cent of Chilean copper production. The mining operation includes an oxide ore heap leach plant processing approximately 20 mt/y of ore.

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  • 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

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  • RECOVERY OF COPPER FROM OXIDE COPPER ORE BY …

    The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H 2 SO 4) leaching. The ore with 4.21% copper grade used in this study was obtained from Çorum-Dangaz region of Turkey. Native copper, cuprite (Cu 2 O), tenorite (CuO), and malachite (Cu 2 (OH) 2 /CO 3) were the

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  • Nature of the Copper-Oxide-Mediated C–S Cross-Coupling ...

    The present study shows an example of leaching from a metal oxide surface, where the leaching process involved the formation of a metal thiolate and the release of water. A new synthetic approach was developed, and many functionalized sulfides were synthesized with yields of up to 96%, using the copper thiolate catalyst.

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  • An investigation into the leaching behaviour of copper ...

    An investigation into the leaching behaviour of copper oxide minerals in aqueous alkaline glycine solutions B.C. Tandaa,J.J.Eksteena,⁎,E.A.Orabya,b a Department of Metallurgical Engineering and Mining Engineering, Western Australian School of Mines, Curtin University, GPO Box U1987, Perth, WA 6845, Australia b Faculty of Engineering, Assiut University, Egypt

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  • (PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE | …

    Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done

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  • Leaching of copper oxide ore by

    leaching processes, in particular by leaching oxide copper ores with sulphuric acid and subsequent downstream processing of the leachate through solvent extraction followed by the electrowinning of copper (SX-EW). At present, heap leaching is a well-known industrial process for the treatment of …

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  • Leaching optimisation of oxide copper ore from Meskani ...

     · Leaching optimisation of oxide copper ore from Meskani mine Leaching optimisation of oxide copper ore from Meskani mine Aghazadeh, Sajjad;Olyaei, Yaser;Noaparast, Mohammad; 2015-01-01 00:00:00 In this research work, agitation leaching of malachite using sulphuric acid solution was investigated in mechanical agitation reactor taking particle size, sulphuric acid stoichiometric …

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  • Oxide Copper Leach Modeling

     · These results indicate that leaching is not a simple process and that anions may play an important role on the rate of copper oxide dissolution. In corrosion field, chloride, sulfate and nitrate ions are considered as aggressive elements for metals that involve their corrosion [18], [19], [20] .

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  • An investigation into the leaching behaviour of copper ...

     · Copper oxide minerals are normally extracted by acidic leaching followed by copper recovery with solvent extraction and electrowinning. However, copper oxide deposits often containing large amounts of acid consumable gangue leads to a very high acid consumption.

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  • Hydrometallurgical Options to Add Value to Copper …

    Copper Leaching In-situ Acid Production Oxide ore Underlying secondary and primary ore FLOTATION Leach Circuit Flotation Tailings Oxygen Acid HEAP LEACH SX/EW Raffinate to Leach Raffinate to Heap Leach e.g. Freeport''s Morenci and Bagdad POX plants Generate excess acid in leaching circuit for oxide leach

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  • EP2650392A1

    Process for the leaching of copper oxide without the utilization of sulphuric acid wherein it comprises impregnating said copper oxide using an organic non contaminant leaching agent which consists in a aqueous solution composed by tricarboxylic acid (C 6 H 8 0 7 ) in combination with water, in a mixture with an acidity varying between pH 1.0 to 5.0; obtain copper citrate; and optionally ...

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  • Leaching kinetics and predictive models for elements ...

     · The copper oxide ore sample used for the experiments was obtained from the Katanga province, D.R. Congo. Commercial grade reagent, 98% H 2 SO 4 was used for the leaching tests. The sample was subjected to particle size distribution analysis which indicated that the ore sample had a P80 particle diameter of 62.23 µm.

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  • Heap Leaching Oxide and Sulfide Copper Ores

    The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. A by-product of the smelting and converting furnaces is sulfuric acid. In what looks like a lucky coincidence, sulfuric acid is needed ...

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  • Copper Ore Types: Sulfides vs. Oxides | An Investor''s ...

     · As with oxide ores, SX-EW tech is used to recover copper from a pregnant leach solution. Secondary sulfides, which are formed by supergene secondary enrichment, are resistant to sulfuric leaching.

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  • Copper Oxide Leaching

    Copper Oxide Leaching GlyLeachTM GLYLEACHTM & GLYCATTM INTRODUCTION GlyLeachTM and GlyCatTM are environmentally benign hydrometallurgical processes that will leach base and precious metals. Glycine is the simplest amino acid and is available in bulk quantities. Its unique properties can offer substantial advantages over conventional lixiviants.

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  • US4132758A

    The nitric oxide is oxidized to nitrogen dioxide by oxygen, either in-situ, or in a separate off-gas oxidizer. Sulfidic minerals containing metal values such as copper, silver, nickel, cobalt, molybdenum, zinc, iron, or mixtures thereof are oxidized with nitrogen dioxide to enable the metal values to be solubilized in an aqueous acidic leach ...

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  • Copper Leaching from Refractory Flotation Tailings

     · zigueline, copper sulfate, copper phosphate, copper arsenate, and other copper soluble salts [1]. Copper oxide is more difficult to recover than copper sulfide. Presently, the three main treatment methods of copper oxide are flotation [2,3], leaching [4], and beneficiation-metallurgy combination processes [5].

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