chalcocite compared to chalcopyrite ore processing
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- chalcocite compared to chalcopyrite ore processing
Bornite and chalcocite present an interesting study because when measured against the standard hydrogen electrode (SHE), there is a small difference in rest potential; bornite has a potential of 0 ...
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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. The paper focuses on demonstrating the impact of the so-called attrition-leaching phenomenon on the leaching …
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Extraction of copper from sufidic ores, either by pyrometallurgy or hydrometallurgy, has various limitations. In this study, a solvometallurgical process for …
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To date, chalcopyrite is the commonest examined copper ore due to its inertness and global abundance indexes. Out of between 150 and 180 global copper ores, chalcopyrite is the most stabilized copper ore, due to its structural configuration [1, 2].It is mostly found in association with pyrite (FeS 2), bornite (Cu 5 FeS 4), sphalerite (ZnS), …
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Chalcocite is formed either as a primary vein mineral or, more typically, in supergene deposits where it forms as a result of the redeposition of copper from the breakdown of minerals such as chalcopyrite or bornite. Chalcocite is distinguished with difficulty from digenite (Cu9S5) and djurleite (Cu31S16), both of which may form by the leaching of …
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Chalcocite is the most abundant secondary copper sulfide globally, with the highest copper content, and is easily treated by conventional hydrometallurgical processes, making it a very profitable mineral for extraction. Among the various leaching processes to treat chalcocite, chloride media show better results and have a greater industrial boom. …
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Due to the formation of Fe 2+ and Cu 2+ during the leaching process, chalcopyrite will also be reduced to chalcocite (Cu 2 S). Compared with chalcopyrite, …
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1. Introduction. Copper is an important metal used in many aspects of people's lives, but there is an imbalance between its supply and demand [1].Medd [2], [3] investigated the global copper resource data and reported that the estimated Cu mineral reserves and mineral resources increased with an increase in global copper production. However, the …
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Chalcocite, although scarce, is still found as a primary mineral and has proved to be one of the most profitable copper ores to mine as it produces copper concentrates ranging from 37% to 40% compared, for example, to chalcopyrite which ranges from 20% to 30% . As the two minerals are associated in deposits as primary and …
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Introduction to Mineral Processing 3 example, an ore containing the mineral chalcopyrite (CuFeS2) derives its value from the contained copper. ... Copper Chalcopyrite Chalcocite Bornite CuFeS 2 Cu 2 S Cu 5 FeS 4 Iron Hematite Magnetite Fe 2 O 3 Fe3O4 Lead Galena Cerusite PbS PbCO 3 Magnesium Dolomite Magnesite (Ca,Mg)CO3
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Due to the formation of Fe 2+ and Cu 2+ during the leaching process, chalcopyrite will also be reduced to chalcocite (Cu 2 S). Compared with chalcopyrite, Cu 2 S is more likely to be oxidized by Fe 3+, which is the reason why the copper leaching rate increases at a low potential of 560 ~ 600 mV (SHE) .
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Abstract. 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 ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant (FeCl 3 as oxidizing agent and ethylene glycol (EG) as …
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SEM studies were also undertaken on the ore sample and the flotation concentrate produced from the ore. Accordingly, copper was identified to be present as sulphides including chalcopyrite, covellite and chalcocite in the ore (Figs. 1 and 2). Pyrite and sphalerite were also observed as the other sulphide phases (Fig. 2).
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Throughout human history, chalcopyrite has been our leading source of copper. This is despite having a relatively low copper yield (only 25% of its atoms are copper) compared to other copper minerals such as …
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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 ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant (FeCl 3 as oxidizing agent and …
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Section snippets Covellite leaching. Covellite (CuS) is a copper sulphide mineral which contains 66% copper and it is now considered as being Cu 2 S 2 (Goh et al., 2006) with the copper existing as copper(I). It is widely associated with chalcopyrite and chalcocite which are the main primary and secondary copper sulphides, respectively …
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extracted from the ore by means of flotation separation, extractive metallurgy or leaching. Figure 2. World Trend in (SX -solvent extraction) capacities from 1985 – 2005 (Rotuska and Chimjeleniki, 2008) 1.2.1.Flotation Separation . Valuable mineral in an ore such as chalcopyrite ore can be separated from each other and from worthless gauge
به خواندن ادامه دهیدChalcopyrite is a mineral and ore of copper. Its chemical composition is CuFeS2, meaning it contains copper (Cu), iron (Fe), and sulfur (S). Chalcopyrite is one of the most important copper ores and is widely distributed in various geological environments. It is often found in association with other sulfide minerals.
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3. Samples and Analytical Methods. The copper mineralization extends vertically for at least 100 m. The mineralization is broadly coincident with a potassic alteration zone and consists of chalcopyrite-bornite-chalcocite either finely disseminated or forming stockwork veinlets (Figure 4).The source of metals for the 109 porphyry deposits …
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Hydrometallurgical processing can be effectively applied to oxidized ores containing CuO, Cu 2 O, carbonate and some silicates and rarely for sulphide ore with chalcocite and covellite as predominant copper mineral (King, 2007; Stevanovic et al. …
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A key conclusion is that chalcopyrite dissolves by oxidn. of the disulfide phase that forms rapidly on freshly fractured chalcopyrite surfaces and also persists on leached chalcopyrite surfaces. Oxidn. of the disulfide phase …
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Some common copper ore minerals include: Chalcopyrite: Chalcopyrite (CuFeS2) is the most common and widespread copper ore mineral. It typically appears as brassy yellow or golden-colored crystals …
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Figures 3.2 and 3.42 (Chapter 3) show other views of golden pyrite. Chalcopyrite, in contrast with pyrite, contains copper and easily tarnishes – often to a yellow-green color. The photo of chalcopyrite below (Figure 9.33) shows multiple colors due to tarnishing. Figures 3.22 and 3.43 (Chapter 3) also show tarnished chalcopyrite.
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Abstract Chalcopyrite ores are usually processed by means of hydrometallurgical or pyrometallurgical processes, but due to environmental aspects and the possibility of increased exploitation of mixed and lower grade ores and relatively small isolated deposits, there has been a worldwide upsurge of interest in the hydrometallurgical processes of …
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Globally, copper, silver, and gold orebody grades have been dropping, and the mineralogy surrounding them has become more diversified and complex. The cyanidation process for gold production has remained dominant for over 130 years because of its selectivity and feasibility in the mining industry. For this reason, the industry has …
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In this study a comparison of feasibility of the pyrometallurgical and hydrometallurgical treatment of low grade (0.23%–0.35% Cu), high content chalcopyrite …
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The kinetic studies of xanthate ions adsorption on chalcopyrite are conducted in the temperature range of 278–293 K. The effect of the contact time on the adsorption of xanthate ion in the concentration range of 5.00×10 −5 –1.00×10 −3 M is shown in Fig. 1. It can be seen from the figure that in all the cases, the equilibrium is ...
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Chalcopyrite and pyrite show a reduced dissolution rate under cyanidation, which facilitates their mineralogical interpretation on the basis of dissolved copper and iron when compared to chalcocite and covellite in sulfide-containing samples (Fig. 5). The presence of other minerals, however, can potentially confound estimates of chalcocite.
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Figure 1. Variations of (A) cell density and (B) pH during chalcopyrite bioleaching at 6°C. MHJ, bioleaching by the mixed culture. H 2 SO 4 (9.2 M) was added to the leaching solution to maintain the pH at ∼2.5 from day 4 to 16 for the bioleaching systems, and from day 4 to 20 for the abiotic control. For each bioleaching system, a …
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