The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS 2) also known as Copper Pyrites and other such sulphides. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. ... The concentration of ore is required and it is done by the Froth Flotation method. Concentration of Ore:
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The photoleaching process is a new approach that differs from the traditional method, where species in the passivating layer, like jarosite and Cu 2 S, among others, limit the leaching of chalcopyrite. If these compounds demonstrate semiconductor properties, the photoleaching process could be improved by utilizing the inherent photochemical ...
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Herein, polymaleic acid (PMA) was utilized as an eco-friendly depressant with high affinity for lead to effectively separate chalcopyrite from galena via the flotation method. Flotation trials showed that PMA, added at low dosages, could considerably depress galena, while chalcopyrite was minimally affected, thereby achieving the …
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In this paper, the research progress of hydrometallurgical leaching of low-grade complex chalcopyrite is reviewed, and the advantages and disadvantages of …
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Notably, the accuracy is comparable to the many-body perturbation based methods (such as G0W0 or its various approximations for band gaps and Bethe-Salpeter equation ... making it a valuable tool for future endeavors in exploring chalcopyrite semiconductors and beyond. I. INTRODUCTION Over the last two decades, ternary …
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The method of the band alignment is discussed in the supplementary material and is similar to that used in our previous works. 41,42 It is to be noted that, for making the supercell, the in-plane lattice parameter of the bulk chalcopyrite is used and that the OVC is strained at the interface. To determine the VBM and CBM of this …
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DOI: 10.1016/j.matpr.2020.10.656 Corpus ID: 230637029; Exploring structural, electronic, and optical properties of the bismuth based palladium chalcopyrite @article{Joshi2020ExploringSE, title={Exploring structural, electronic, and optical properties of the bismuth based palladium chalcopyrite}, author={Nikunj Joshi and …
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Based on thermodynamic calculations, a new two-step model for ferrous-promoted chalcopyrite leaching was proposed, whereby chalcopyrite is reduced to bornite followed by its fast oxidation. Understanding copper extraction through different routes is …
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The Forcite module in Materials Studio 2019 was employed to simulate the adsorption behaviour of PAA molecules on CuFeS 2 (1 1 2) and FeAsS (0 0 1) surfaces. In these simulations, the Build module was first used to cut the crystal planes of arsenopyrite and chalcopyrite to expose the (0 0 1) and (1 1 2) surfaces and establish a 4 × 3 × 1 …
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Galena (PbS) and chalcopyrite (CuFeS2) are sulfide minerals that exhibit good floatability characteristics. Thus, efficiently separating them via common flotation is challenging. Herein, a new method of surface sulfuric acid corrosion in conjunction with flotation separation was proposed, and the efficient separation of galena and …
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Photovoltaic device properties of flexible CZTSSe3-S and CZTSSe7-S. a 3-Stacked and b 7-stacked precursor structures.c Four cells ~4.5 mm × 12.3 mm in size are included in the Mo foil substrate ...
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For example, in the flotation of chalcopyrite and galena minerals, the xanthate-K 2 Cr 2 O 7 depressant pair showed low recovery instead of using the dixanthogen-K 2 Cr 2 O 7 depressant, where the separation results are much better . The chalcopyrite flotation mechanism also takes into consideration the chemisorption of …
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Introduction. Copper (Cu) is one of the most important nonferrous metals, and has been widely used in the modern industry. Chalcopyrite (CuFeS 2) is the main mineral source for the copper metallurgy, which is usually enriched by using flotation technology (Chen et al., 2019).In most of the chalcopyrite ore deposits, talc (Mg 3 (Si 2 O 5) 2 …
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Activation of periodate (PI) has been widely recognized as an efficient and economical technique for the elimination of contaminants. In this study, a novel system with PI triggered by chalcopyrite (CuFeS 2) was applied in the decomposition of tetracycline hydrochloride (TC).Effects of CuFeS 2 dosage, PI concentration, pH value, inorganic …
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In the present study, the ability of A. copahuensis cells to colonize and form biofilms on the chalcopyrite surface was explored. This species efficiently contributed …
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Different synthesis methods can result in chalcopyrite with varying morphology and band position, which in turn affect the production of ROS and ultimately impact catalytic performance (Bárdos et al., 2018). Several synthesis methods have been reported in AOPs, such as the hydrothermal method, MW-assisted method, solution …
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The ore reserve is estimated as 1.7 million tons excluding uneconomical pyrite mineralization. The depth of the chalcopyrite-pyrite-sphalerite ore varies between 25 and 100 m because of the irregularities both of surface topography and the top of the ore body. The thickness of the chalcopyrite body varies between 1 and 16 m (Figure 1).
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Chalcopyrite is a copper-iron sulfide mineral that can be oxidized by oxygen, ferric ions, or microbes under acidic conditions. It can also be leached by hydrometallurgical …
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The accurate prediction of electronic and optical properties in chalcopyrite semiconductors has been a persistent challenge for density-functional-theory (DFT) -based approaches. Addressing this issue, we demonstrate that very accurate results can be obtained using a nonempirical screened dielectric-dependent hybrid (DDH) functional. …
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Geophysical methods are suitable methods for prospecting and exploring mineral deposits. Resistivity and induced polarization (IP) methods are the main methods of geophysical studies on sulfide ...
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The work provides an efficient method of Tetracycline (TC) treatment by using natural chalcopyrite (NCP) as the photocatalytic activation of peroxymonosulfate (PMS) in aqueous. The results demonstrate that compared to simply NCP or PMS processes, the efficiency of TC removal ( within 40 min) in the NCP/PMS/Light …
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Diagram of the smelting and conversion processes for obtaining copper from sulfide ores (Chalcopyrite CuFeS 2). Another promising approach is using hydrometallurgical …
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Hydrogen peroxide (H 2 O 2) has been used as an oxidizing agent in the selective flotation of chalcopyrite and molybdenite.However, this method required relatively high concentration of H 2 O 2 to deliver flotation results (i.e., mineral grades and recoveries) comparable to those obtained by the conventional copper-molybdenum (Cu …
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Flotation separation of chalcopyrite/pyrite mixtures under Mg(OH)2 depression effectively limits pyrite entrainment into Cu concentrates. However, the Cu concentrate is still negatively affected ...
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chalcopyrite by flotation methods and of metal extraction by thermal oxidation, reduction, aqueous oxidation, chlorination, and electrolytic treatment. One chapter …
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The method used to extract copper from its ores depends on the nature of the ore. Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. …
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Since chalcopyrite is the primary copper mineral and Au-bearing mineral, we interpret this isochron age as the timing of Cu-Au mineralization, based on field geology and petrographic evidence. Using 187 Re/ 188 Os versus 187 Os/ 188 Os to yield a typical Re-Os age with initial 187 Os/ 188 Os ratio of 8.3 ± 4.0, which suggests the source of ore ...
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In this study, the effects of coarse chalcopyrite particles as a carrier on flotation behavior of fine chalcopyrite was investigated by the flotation experiments using 20 g fine chalcopyrite ...
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This article presented a comprehensive review of the application of CuFeS 2 in energy storage, having been exploring both its natural occurrence and artificially …
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