• Chapter 6 Copper Production Technology

    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 smelter were adapted to porphyry copper ores. With the exception of leaching-solvent extrac-tion-electrowinning, the basic methods ...

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  • Copper Chloride Leaching Process

    The Copper Chloride Leaching Process consists of the following main steps: Concentrate repulp. Atmospheric chloride leaching. Leaching residue thickening, filtration, wash, and stabilization. Copper solvent extraction (conversion from chloride to sulfate) Silver recovery from raffinate. Copper …

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  • Copper leaching from primary sulfides: Options for ...

     · The process uses low temperature pressure oxidation to directly leach copper from the ore followed by SX/EW of copper from the resulting leach solution. The plant operation achieved an annualized copper production of 50,000 tonnes Cu as LME grade cathode in 2002. The choice of pressure oxidation for this application was driven by necessity.

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  • Integrated Operations

    The SXEW facility has a production capacity of 56,000 tons per year of LME grade A copper cathodes. Overburden removal commenced in 1957 and ore production commenced in 1960. Our Toquepala operations utilize a conventional open-pit mining method to collect copper ore for further processing in our concentrator.

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  • Production of copper cathode from oxidized copper ores by ...

     · Highlights A systematic process for production of copper cathode is developed. Copper cathode is obtained after leaching, precipitation and electrowinning steps. Each step of the process is optimized by design of experiments methods. A scale-up experiment is carried out and the copper cathode purity reaches 99.99%. Na 2 SO 4 as a co-product is produced with 99.1% purity.

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  • Copper Production: How Is Copper Made?

     · After crushing oxide-type copper ores, such as azurite (2CuCO 3 · Cu(OH)3), brochantite (CuSO 4), chrysocolla (CuSiO 3 · 2H 2 O) and cuprite (Cu2O), dilute sulfuric acid is applied to the surface of the material on leaching pads or in leaching tanks. As the acid trickles through the ore, it combines with the copper, producing a weak copper ...

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  • US6277341B1

    A process is provided for the leaching of copper from chalcopyrite using ferric sulfate in which acceptable rates of leaching are achieved by controlling the surface potential of the chalcopyrite to an empirically determined "window" within the broad range of 350 to 450 mV. The most effective process conditions involve the selection of the said surface potential; the leach temperature; the ...

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  • Biological Leaching and Selection of Copper Production Line

    The following is a brief introduction of biological leaching of copper production line. Common microbe mineral processing technology are heap leaching and leaching. Heap leaching means to heap mined ore, and then use microbe leaching solution. Due to its production cost is low and less pollution, it has been widely used.

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  • Applying Softcomputing for Copper Recovery in Leaching Process

     · Computational techniques have recently been incorporated into the copper industry to improve both the process and the results obtained through leaching, thus achieving tangible results such as higher levels of production, identification of low grade ore, and reduction of production costs .

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  • Chapter 7 Energy Use in the Copper Industry

    The use of leaching and solvent extraction eliminates smelting and converting altogether, Further conservation is possible, however. This chapter reviews the energy requirements for the various stages of copper production, in-152 Table 7-2.—Hypothetical Copper Operation for Analyzing Energy Use

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  • Copper Leaching Method

     · Copper Leaching Practices. For centuries small amounts of copper have been recovered from acid mine-drainage waters. In recent years, the expansion of copper-bearing waste dump leaching for copper recovery has established a technological basis that is rapidly converting the art of copper leaching into a science.

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  • US6451089B1

    A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent extraction techniques or apparatus. A process for recovering copper from a copper-containing ore generally includes the steps of providing a feed stream containing communicated ...

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  • Efficiency of Chemical and Biological Leaching of Copper ...

    Copper slags produced in vast quantities in smelting operations could be considered as secondary material sources instead of stockpiling them in landfills. This study investigates the recovery of valuable metals from copper slag and the valorisation of the leach residue as construction material in line with the principles of a circular economy.

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  • The use of surfactants to aid and improve the leaching of ...

    Copper heap leach operations often suffer from reduced efficiency due to long leach times and variable recoveries. Surfactants have been considered as an option in increasing the leachability of ores. Improvements in overall copper extraction have been noted with their use, though testing has only been conducted on a limited scale. The molecular function of surfactants in heap leaching has not ...

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  • CAUSES OF COPPER CORROSION IN PLUMBING SYSTEMS …

    As described in the introduction, the initial corrosion rate of new copper pipework is quite high. However, this quickly falls as a protective patina of copper corrosion products builds up on the bore of the pipe. After about a year of service, the corrosion rate of copper and …

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  • Optimization of sulfuric acid leaching of roasted ...

     · Chalcopyrite (CuFeS2) is commonly used ore in production of copper, but leaching of this ore is very slow and inefficient due to "passivation" during leaching at atmospheric conditions. In this study, in order to overcome drawbacks of the passivation layers, the concentrate supplied from Eti Bakır A.Ş. Küre Plant in Turkey was roasted at 600 °C for 1 h and after leached.

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  • CHILEAN COPPER MINING COSTS

    AVERAGE COPPER MINING GRADES CHILE VS WORLD 2005-2016 • Average Ore grades of the sulfide line have decreased similarly (27%), Chile and the World. • Ore grades of the oxides line in Chile are lower than the world average. • There is a depletion of oxidized resources in Chile, which will mean 66% lower production of SX-EW cathodes by 2027.

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  • Pressure Leaching of Copper Concentrates

    Pressure Leaching of Copper Concentrates ... Above design copper extraction Operating costs in line with expectations ... 25 October 25th, 2004 Bagdad Concentrate Leach - Copper Production 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4) Production (metric tons) Design Basis Production.

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  • In situ leaching of copper: Challenges and future ...

     · In situ leaching offers a potentially attractive way to extract copper from the subsurface without costly fragmentation and processing. Applicability of in situ leaching is limited to deposits where sufficient permeability exists and where the copper and gangue mineralogy is amenable to leaching.

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  • Acid Leaching

     · PREPARATION OF THE COPPER ORE. This study is limited in general to percolation leaching as it is the most widely used method to give proper contact of solvent with the ore to effect extraction of the copper. One of the important factors in percolation leaching is the size reduction necessary for copper recovery within reasonable time limits.

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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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  • Copper Solvent Extraction

    The overall leaching, solvent extraction and final metal production processes can be summarized in the following simplified flowsheet. LEACHING PROCESS / SOLVENT EXTRACTION / FINAL COPPER RECOVERY Copper leaching R e c y c l e d l e ac h s o l u t i o n Copper extraction S t r i p p e d L I X ® R e a g n t Copper stripping A q u o u s s tri p ...

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  • Solvometallurgical process for extraction of copper from ...

    With more FeCl 3 present in the leaching solution, more copper and iron were dissolved. The leaching percentage of copper increased to 80% with 0.5 mol L −1 of FeCl 3. In other words, 1 mL of 0.5 mol L −1 of FeCl 3 in EG could extract copper from 40 mg of chalcopyrite quantitatively.

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  • Leaching of Copper Sulphides

    to the development of projects involving the leaching of copper sulphides are discussed. Finally, a number of conclusions are presented that will be useful to keep in mind when considering projects involving the leaching of copper sulphides. INTRODUCTION In the ten years from 2003 to 2013 global mine production of copper has increased by over ...

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  • A fresh approach to sulfide ores

     · Moreover, while FL can install an entirely new leach plant – agitators, pumps, motors, tanks and all – they are also able to retrofit existing leach infrastructure by adding SMRt reactors. Roy added that the "flexible" technology caters to the "fluctuating" nature of copper production.

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  • PROCESSING OF COPPER ANODE-SLIMES FOR …

    contents of copper, lead, tin and silver has been presented. The proposed hydrometallurgical process consists of two leaching stages for extraction of copper with H2SO4 – O2 and silver with thiourea – Fe3+. Pyrometallurgical treatment of the leaching solid residue for production …

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  • Innovations in Copper: Mining & Extraction: Producing ...

    and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical Processes Since most of the copper production in the world comes from the treatment of sulfide ores, hydrometallurgy

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  • The selective leaching of copper from a gold–copper ...

    gold leaching either using the same process at elevated temperature (40–60 °C), as patented by the authors, or using a cyanidation process. Copper selective leaching will reduce the gold losses due to a cementa-tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.

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  • HYDROCOPPER – A NEW METHOD FOR TREATING COPPER …

    leach the majority of the copper. The third leaching stage is also oxidative and will leach the remaining 2 – 5% of the copper in concentrate. Copper yield in leaching has been at least 98% for every concentrate tested. If gold is present in the concentrate, it starts to leach after most of the copper in concentrate has been leached.

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  • Zaldívar Copper Mine

    The run-of-mine dump leach material is further leached on the old sulphide ore pad. The solvent extraction trains transfer copper to the tankhouse, which produces copper cathodes meeting LME Grade A specifications. Production. In 2004, the mine produced 147,602t of Grade A-standard copper cathode, treating 18.2Mt of ore grading 1.0% Cu.

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  • Copper recovery using leach/solvent extraction ...

    Exploration and Development Corporation, came on line1. Copper recovery by L/SX/EX in 1968 In 1968 there were only two widely practiced copper leaching processes using dilute sulphuric acid. The first process, vat leaching of high-grade copper oxide ore followed by EW of copper from the leach solution, produced low quality copper

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  • LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY …

    minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio. The copper concentration in the leach solution ranged from 0.80 to 1.75 g dm-3. The total Cu recovery rate ranged from 30 to 56 %, whereas the

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  • HEAP LEACHING TECHNIQUE in MINING

    metal ores (<1% copper, <1g/ton gold, < 0.5% nickel) previously considered uneconomical, became feasible with introduction of heap leaching technologies (Marsden, 2009). In consideration of ore types, a generalized diagram showing the applicable ore beneficiation

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