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extraction de chalcopyrite

2Feb 1997
Copper extraction from chalcopyrite: Comparison of three no…

A Review on Novel Techniques for Chalcopyrite Ore Processing

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20Feb 670
Extraction of valuable metals from the chalcopyrite ...

Plus de 95% du cuivre de la chalcopyrite se trouvent dans le résidu. Un schéma de procède est proposé pour le traitement du concentré de chalcopyrite permettant la récupération de chlorure de cuivre et de soufre élémentaire ainsi que le recyclage du chlore. L''extraction totale du chrome est possible par la carbochloruration du ...

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21Feb 1629
Pyrite Chalcopyrite : Propriétés et applications

2021-3-18 · Pour vérifier les dysfonctionnements de Chalcopyrite C''est un minéral important pour l''extraction du cuivre, à commencer par la cartographie géologique régionale et la collecte des sédiments fluviaux. Si les résultats du laboratoire réussissent, une petite zone sera séparée par une concordance de concentration de ce minéral et ...

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30Feb 576
[ PDF] Biohydrometallurgy of Chalcopyrite ebook | …

The low copper extraction and dissolution kinetics restricted the industrial application of chalcopyrite bioleaching. To solve this problem, the dissolution process and passivation mechanism of chalcopyrite in bioleaching should be first studied, then the rate-limiting steps should be analysed explicitly, and finally the intensifying method can ...

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13Feb 1047
(PDF) Solvometallurgical process for extraction of copper ...

2019-11-5 · 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 ...

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24Feb 526
(PDF) Chlorination of chalcopyrite concentrates

[13] N. Kanari, "Extraction des métaux de valeur des concentrés de chalcopyrite et de chromite par chloruration," (Ph. D. thesis, INPL-LEM, Nancy, France, 1995), 209 pages.

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11Feb 579
Chalcopyrite leaching by CuCl2 in strong NaCI solutions ...

Chalcopyrite oxidation by CuCl2 in NaCl solutions has been studied as a function of leaching time, temperature, grain size, Cu(II)/Cu(I) ratio, and Cl− activity. The experiments have been performed under conditions where the solution potential remains almost constant in each test. Leaching rates are high above 85 °C, and high copper recovery can be obtained provided that high Cu(II)/Cu(I ...

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26Feb 1974
Cooperative extraction of metals from chalcopyrite by bio ...

Cooperative extraction of metals from chalcopyrite by bio-oxidation and chemical oxidation. Author links open overlay panel Xin Lv a b 1 Jingshu Wang a b 1 Xiandong Zeng a b Zhanshuo Liang a b Dongdong He a b Yisheng Zhang a b Haijun Yuan a b Hongbo Zhao a b c Qingbo Meng d. Show more. Share. Cite.

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3Feb 1305
Chalcopyrite bioleaching of an in situ leaching system by ...

Chalcopyrite bioleaching of an in situ leaching ... experiment showed that the copper extraction rate of the community invaded by a sulfur-oxidizing ... sul des, pyritic gold ores or nickel-copper sul de ores.2,3 Biol-eaching systems constitute suitable habitats and niches for the

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19Feb 1121
Sustainable copper extraction from mixed chalcopyrite ...

2019-10-1 · In fact, an alternative copper extraction route from mixed sulphide ores, chalcopyrite and chalcocite using mesophilic biomass consortium at 33.3 °C and ferric leaching process were attempted. Bioleaching experiments were settled with a fraction size of −75+53 µm. Bacteria were used as the catalyst. A copper yield of 65.50% was obtained.

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21Feb 549
Extraction of Copper from Copper-Bearing Materials by ...

2020-8-11 · Recycling metals from secondary materials and more complex ores has recently been attracting more attention, creating a need for more precise separation methods of different elements. This study proposed a sulfation-roasting method and designed thermodynamic conditions to selectively facilitate the formation of copper sulfate while separating iron as oxide. The roasting behaviors for ...

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26Feb 921
Leaching of Chalcopyrite Concentrate with Hydrogen ...

2013-5-1 · Interaction between the chalcopyrite amount and the leaching time shows that passing iron into leaching solution can be limited using about 2.5 g of the chalcopyrite for 30 minutes of the leaching time (Figure 7(a)). Iron extraction can also be limited at low values of …

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23Feb 894
(PDF) Improving of copper extraction from chalcopyrite by ...

Based on the results, it may be stated that selective copper extraction can be obtained from a chalcopyrite concentrate by a two-step leaching method using a conventional …

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27Feb 578
Copper leaching from chalcopyrite concentrates

Recently, there are several attempts to extend the use of chloride leaching for copper extraction from primary sulfides and particularly for chalcopyrite (Alvarez, 2014;Nicol et al., 2010;Patiño ...

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12Feb 1165
Bacterial consortium for copper extraction from sulphide ...

The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species …

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20Feb 1545
Leaching of chalcopyrite with ferric ion. Part I: General ...

2008-8-1 · The chemical formula that best describes chalcopyrite is Cu + Fe 3+ S 2 2− (De Filippo et al., 1988, Boekema et al., 2004, Mikhlin et al., 2004).The crystal structure consists in a relatively simple tetragonal lattice, close to cubic (Betejtin, 1977, Sand et al., 2001), with each sulphur ion surrounded by four metal ions of copper and iron located on tetrahedron angles and in a certain order ...

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6Feb 940
Cooperative extraction of metals from chalcopyrite by bio ...

2021-5-21 · The total Cu and Fe extraction from dissolution experiments in the presence of bacteria and ozone are presented in Fig. 1.As bacteria oxidized and decomposed the chalcopyrite, the total Cu and Fe in the biotic stage increased rapidly at first, and then stagnated to a relatively stable range.

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13Feb 1525
Direct selective leaching of chalcopyrite concentrate ...

2014-6-12 · Avec ces conditions, le rendement d''extraction du cuivre était d''environ 72%. De plus, le rendement d''extraction du fer diminuait avec l''augmentation de la concentration de carbonate d''ammonium, qui empêchait également le fer de passer en solution. L''analyse aux rayons x et au SEM supportait également ces résultats.

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8Feb 549
A Review on Novel Techniques for Chalcopyrite Ore …

2012-1-1 · In the chemical stage, chalcopyrite concentrate are leached with ferric sulfate at 12 g/L and pH 1.25 in the agitated reactors using silver as a catalyst. Higher copper extraction (>95 % wt) is obtained by activating concentrates with 2 mg Ag/g of concentrate at 70 o C and 10 hours leaching (Dresher, 2004). 2.2.2.2.5. The Biocop (TM) Process

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1Feb 1970
Comparison of chalcopyrite bioleaching after different ...

2017-2-5 · 1 % chalcopyrite) compared to other enrichment systems. The generated ferric precipitation during bioleaching had a key influence on the final copper extraction. After enrich-ment, higher ratio of iron-oxidizer and higher ratio of sulfur-oxidizer existed in enrichment B and C, respec-tively. These caused the different bioleaching behaviours

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5Feb 1069
(PDF) AN INVESTIGATION OF LEACHING CHALCOPYRITE …

Chalcopyrite is the only source of copper in the ore. " [u0015]^ 2. A chalcopyrite grade of 1.44% exists which equates to 0.079 _"`ab and a copper grade of 0.5%. " [u0015cd 3. A pyrite grade of 3% exists which equates to 0.242 _"`ab 4. Ore is pre-heated to 333K unless otherwise stated. e 5.

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27Feb 583
Reconstruction of the Chalcopyrite Surfaces—A DFT Study ...

2019-12-12 · Chalcopyrite (CuFeS2) is the main source of copper in the world. The development of hydrometallurgical processes to extract copper from chalcopyrite is challenging due to the low leaching kinetics. The main difficulty is in the fact that the kinetics of the leaching process decreases very rapidly, marginally stopping the reaction. A passivation process of the surface has been proposed for ...

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1Feb 1328
Innovations in Copper: Mining & Extraction: Producing ...

2021-8-12 · Three of the processes introduced above have made great strides in solving these problems for the extraction of copper from chalcopyrite: The GEOCOAT™ Process - A heap leaching process that is capable of bioleaching copper concentrates. It does …

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23Feb 1820
Extraction Of Copper | Mining, Concentration, Smelting ...

The major steps in the extraction of copper are. Copper in Chalcopyrite is reduced to copper sulphide. Just like in Blast Furnaces, calcium carbonate is added as a flux to create the slag. Iron in Chalcopyrite is removed as iron silicate slag. Most of the sulphur in Chalcopyrite …

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12Feb 904
Copper extraction from chalcopyrite: Comparison of three ...

2016-1-1 · Three oxidants, hypochlorous acid, chlorate and nitrate, were assessed for their ability to oxidise chalcopyrite (CuFeS 2).Hypochlorous acid was the most aggressive oxidant trialled, with copper extraction reaching a plateau after 1–5 h.Extraction in this system was complete at room temperature when reagent concentrations of 0.3–0.4 M were supplied.

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2Feb 1882
Leaching chalcopyrite with high MnO2 and chloride ...

In the present research, the dissolution of pure chalcopyrite was studied considering the use of MnO2 and wastewater with a high chloride content. Fine particles (−20 μm) generated an increase in extraction of copper from the mineral.

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13Feb 1627
Processes

Processes. Copper is found in natural ore deposits around the world. This page explains the production route taken from extraction of ore-containing rock to a final product that is the highest-purity commercial metal in existence and used in a wide variety of …

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