One-step fastest method of nanocrystalline CuAlS2 …
Nanocrystalline CuAlS2 chalcopyrite has been mechanosynthesized at room temperature for the first time by ball milling the stoichiometric mixture of elemental of Cu, Al, …
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Simultaneous autogenous milling and ferric chloride …
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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A systematic review of sustainable gold extraction from …
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 process mineralogy approach to study the efficiency of milling …
As can be seen in Fig. 6 B, the minerals present in the product of open-circuit mill, in the order of abundance, include molybdenite, which is mostly free and has become fine after grinding in mill, liberated chalcopyrite particles (about 32.0%) and interlocked with pyrite and other associated gangue minerals, and liberated and interlocked ...
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Experimental characterization of chalcopyrite ball mill …
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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Mechanical activation modes of chalcopyrite concentrate …
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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Hydrometallurgical Processing of Chalcopyrite by …
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 …
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Mechanical activation modes of chalcopyrite concentrate …
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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Estimation methodology for Bond ball mill work index …
The inner diameter and the length are 0.305 m, and the ball load is 19.4% of mill volume (equaling a total weight of 20.125 kg). The mill has a frequency inverter with 220 V single-phase. The mill design, operating conditions, and ball size distribution were based on Bond's (1961 a,b) work index methodology and are shown in Table 2.
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Solvometallurgical process for extraction of copper from …
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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Experimental characterization of chalcopyrite ball mill …
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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The manipulation of natural mineral chalcopyrite CuFeS 2 …
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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One-step fastest method of nanocrystalline CuAlS2 chalcopyrite …
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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Simultaneous autogenous milling and ferric chloride …
In this study autogenous milling was conducted simultaneously with ferric chloride leaching. A sequence of products was observed, with chalcopyrite being replaced by synthetic …
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Preparation of nanocrystalline CuAlFeS2-mixed chalcopyrite …
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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Electrolytic production of copper from chalcopyrite
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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Experimental characterization of chalcopyrite ball mill …
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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Mechanical activation modes of chalcopyrite concentrate …
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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Chalcopyrite, sphalerite, and pyrite chemistry in stratiform …
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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Mechanochemistry for Energy Materials: Impact of High‐Energy Milling …
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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Pressure Leaching of Chalcopyrite Concentrate: Ultra-Fine Milling …
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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Experimental characterization of chalcopyrite ball …
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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One-Step Solid-State Mechanochemical Synthesis of Metal
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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Unlocking the electrocatalytic activity of natural chalcopyrite …
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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Hydrometallurgical Processing of Chalcopyrite by Attrition …
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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CN115403016A
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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Optimizing CuFeS2 Chalcopyrite Thin Film Synthesis: A
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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Using Mechanical Activation to Increase Copper Extraction …
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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Using Mechanical Activation to Increase Copper Extraction …
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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Solvometallurgical process for extraction of copper from chalcopyrite …
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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