عملية قبول chalcopyrite
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The replacement of chalcopyrite by bornite under hydrothermal conditions
Nov 1, 2014 · We report the replacement of chalcopyrite by bornite under hydrothermal conditions in solutions containing Cu(I) and hydrosulfide over the temperature range 200-320 °C at autogenous pressures. Chalcopyrite was replaced by bornite under all studied conditions. The reaction proceeds via an interface coupled dissolution-reprecipitation …
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Chalcopyrite | Copper Ore, Sulfide Ore, Pyrite | Britannica
Chalcopyrite, the most common copper mineral, a copper and iron sulfide, and a very important copper ore. It typically occurs in ore veins deposited at medium and high temperatures, as in Río Tinto, Spain; Ani, Japan; Butte, Mont.; and Joplin, Mo. Chalcopyrite (Cu2Fe2S4) is a member of a group of
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The effect of oxidized starches on chalcopyrite flotation
May 1, 2021 · As shown in Table 1, the proportion of COOH and C O groups is generally low (i.e. < 2%), which implies that a high portion of the pendant OH groups remains unaltered (Laskowski et.al., 2007). Zeta potentials of the oxidized starches were obtained using a laser Doppler micro-electrophoresis (Malvern Zeta Nano ZS) and presented in …
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Minerals | Free Full-Text | The Effects of Chloride on the High …
Aug 11, 2023 · The complete reaction of chalcopyrite at ≥220 °C under pressure oxidation conditions (10 or 20% w/w pulp density, PO2 700 kPa) is a clean, near complete process, yielding high copper extractions (~99%) in an acidic leach liquor composed of dissolved metal sulphates, when high-quality process water is employed. However, when the …
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Study of galvanic interactions between pyrite and chalcopyrite …
Aug 15, 2006 · When galvanic interactions between pyrite and chalcopyrite occur in solution, pyrite, with the higher rest potential, acts as a cathode and is protected whereas chalcopyrite, with the lower rest potential, acts as an anode and its oxidation is increased. In this work a three-electrode system was used to investigate the corrosion current density …
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Minerals | Free Full-Text | Utilization of PMA …
The chalcopyrite semiconductors copper indium disulfide (CuInS 2) or diselenide (CuInSe 2) have seen steady improvements in efficiency for use as thin-film photovoltaics [127]. The bandgap of CuInS 2 ( E g = 1.5 eV) is a good match to the AM0 (space) solar spectrum [128] ; CuInSe 2 ( E g = 1.1 eV) is a promising low-cost electro-optical ...
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Electrochemical study and XPS analysis of chalcopyrite dissolution in ...
Feb 10, 2021 · 1. Introduction. Chalcopyrite (CuFeS 2) is the most abundant copper-bearing mineral in nature and is the primary mineral used for the commercial production of copper.It accounts for approximately 70% of the world's copper reserves [1].Various studies have considered the dissolution of CuFeS 2 in different aqueous media; such as sulfates [2], …
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Phys. Rev. B 72, 035215 (2005) - Anion vacancies as a source …
Jul 18, 2005 · Using first-principles electronic structure calculations we identify the anion vacancies in II-VI and chalcopyrite Cu − III − VI 2 semiconductors as a class of intrinsic defects that can exhibit metastable behavior. Specifically, we predict persistent electron photoconductivity (n-type PPC) caused by the oxygen vacancy V O in n-ZnO, originating …
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