Nanocrystalline CuAlFeS 2-mixed chalcopyrite has been mechanosynthesized at room temperature for the first time by ball milling the stoichiometric mixture of elemental powders of Cu, Al, Fe and S under argon atmosphere. It has been noticed that at early stage of milling, a nanocrystalline CuS has been formed. Nanocrystalline CuAlFeS 2 phase has been formed …
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The CuFeS 2-BM catalyst was obtained via a facile mechanical milling method. Briefly, the high-purity chalcopyrite ores obtained from Yunnan, China were first mechanically milled in a planetary mill (QM-3SP04, inner volume of zirconia mill jar: 50 mL) loaded with zirconia balls (150 g, 8 mm and 5 mm in diameter, weight ratio of 1:1) for 1 h.
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Ural enrichment plants processing copper-porphyry deposits are produced chalcopyrite concentrates of the following chemical composition, %: 21.5 Cu, 0.1 Zn, 26.59 S, 24.52 Fe, 0.05 Pb, 0.04 Ni, 16.28 SiO2 [1]. According to previous studies [2, 3, 21], such concentrates can be effectively treated using pressure oxidative leaching (POX). At temperature of 190–200 °C, …
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In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant (FeCl 3 as oxidizing agent and ethylene glycol (EG) as organic solvent).
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Physical processing methods are widely applied in mineral separation. In the case of gold ores, physical separation can be employed to produce concentrates, and in the case of free-milling ores or to produce gold intermediate-enriched mineral products, by rejecting gangue material, which facilitates more effective hydrometallurgy.
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A mineralogy, rheology, and energy consumption-based experimental characterization of chalcopyrite ball mill grinding processes, in both batch and continuous flow processing modes, is carried...
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Chalcopyrite CuFeS 2, a semiconductor with applications in chemical sector and energy conversion engineering, was synthetized in a planetary mill from elemental precursors.The synthesis is environmentally friendly, waste-free and inexpensive. The synthesized nano-powders were characterized by XRD, SEM, EDX, BET and UV/Vis techniques, tests of chemical …
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The invention discloses a high-performance chalcopyrite thermoelectric material and a preparation method thereof, wherein the chalcopyrite thermoelectric material is prepared by two chalcopyrite materials CuGaTe with the same structure 2 And AgGaTe 2 The chemical composition formed after high-proportion solid solution is Cu 1‑x Ag x GaTe 2 Wherein x is …
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One hypothesis is that mechanical activation could be incorporated to help increase the percentage of minerals extracted. After the primary milling, half of the chalcopyrite powder …
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In this study, the properties of the natural mineral chalcopyrite CuFeS 2 after mechanical activation in a planetary mill were studied. The intensity of mechanical activation was controlled by changing the revolutions of the mill in the range 100–600 min −1.
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In this study, a high-energy planetary mill was used to perform mechanical activation of chalcopyrite in dry-, moist-, and wet-milling modes. Granulometric and …
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1.1 High-Energy Milling. High-energy milling is a tool to perform mechanochemical reactions. Apart from conventional ball milling that delivers only limited amount of energy mainly to reduce the particle size of the treated material, additional effects like mechanical activation and defect formation are observed by applying high-energy mills.
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A detailed characterization of chalcopyrite ball mill grinding processes, in both batch and continuous flow processing modes, has been carried out in this work. The referred characterization involved different mineralogical, rheological and energy consumption-related …
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A mineralogy, rheology, and energy consumption-based experimental characterization of chalcopyrite ball mill grinding processes, in both batch and continuous flow processing modes, is carried...
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In this study autogenous milling was conducted simultaneously with ferric chloride leaching. A sequence of products was observed, with chalcopyrite being replaced by synthetic nantokite (CuCl) and the nantokite being more gradually replaced by …
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In this study, a high-energy planetary mill was used to perform mechanical activation of chalcopyrite in dry-, moist-, and wet-milling modes. Granulometric and microstructural changes of chalcopyrite were characterized, and their effects on …
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A detailed characterization of chalcopyrite ball mill grinding processes, in both batch and continuous flow processing modes, has been carried out in this work. The referred characterization involved different mineralogical, rheological and …
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As chalcopyrite dissolution is notoriously complex and highly dependent on specific surface chemistry, Yang et al. [28] demonstrate a high-throughput 'ore-on-a-chip' method to study and optimize leaching conditions for specific deposits. Microfluidic platforms enable fast and efficient testing, so the mechanisms behind chalcopyrite ...
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For example, wet milling (WM) of chalcopyrite is primarily performed using a stirred mill (Granata et al., 2019; Onisei et al., 2012). However, limited studies have investigated the effects of various milling modes on chalcopyrite leaching efficiency. ... Effect of the milling time on the reaction kinetics for various milling methods: (a) 0 ...
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Nanocrystalline CuAlS2 chalcopyrite has been mechanosynthesized at room temperature for the first time by ball milling the stoichiometric mixture of elemental of Cu, Al, and S powders under argon atmosphere.
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Stratiform sediment-hosted Cu deposits are significant global sources of Cu and other important metals. The Polish Kupferschiefer produces Ag, Au, Pb, Ni, Se, and Re as by-products, whereas Co is one the of most important metals in the stratiform sediment-hosted Cu-Co deposits of the Central African Copperbelt and the Namibian Dolostone Ore Formation …
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In this study, the properties of the natural mineral chalcopyrite CuFeS 2 after mechanical activation in a planetary mill were studied. The intensity of mechanical activation …
WhatsApp: +86 18221755073
We report the investigation of a chalcopyrite leaching process that implements millimeter-sized glass beads that are stirred in the leach reactor to combine particle grinding, mechanical activation, and surface removal of reaction products.
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In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an …
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The particle size distribution (PSD) characterizing the chalcopyrite head ore was determined using the standard meshes method. As shown in Table 1, this method involves gradually sieving the sample on 10 different meshes.At each sieving, the mass of ore retained on each mesh is weighed, which is used then to calculate the corresponding mass percentage.
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In this study autogenous milling was conducted simultaneously with ferric chloride leaching. A sequence of products was observed, with chalcopyrite being replaced by synthetic …
WhatsApp: +86 18221755073
We report the investigation of a chalcopyrite leaching process that implements millimeter-sized glass beads that are stirred in the leach reactor to combine particle grinding, mechanical activation, and surface removal of reaction …
WhatsApp: +86 18221755073
One hypothesis is that mechanical activation could be incorporated to help increase the percentage of minerals extracted. After the primary milling, half of the chalcopyrite powder is mechanically activated with high energy milling (HEM) using a …
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This study presents a novel method to fabricate CuFeS 2 chalcopyrite thin films using a three-step synthesis of ball-milling, thermal evaporation, and sulfurization.
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Nanocrystalline CuAlS2 chalcopyrite has been mechanosynthesized at room temperature for the first time by ball milling the stoichiometric mixture of elemental of Cu, Al, …
WhatsApp: +86 18221755073