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Bornite (Cu 5 FeS 4) and chalcocite (Cu 2 S) are important copper bearing minerals due to their high copper content. Bornite is typically found as a secondary mineral in chalcopyrite and chalcocite deposits in …
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A thermodynamic and kinetic model is proposed to explain the formation of bornite, chalcopyrite, and magnetite during partial roasting of enargite-containing copper concentrates. The proposed mechanism involves solid–solid–gas and solid–gas reactions between chalcocite, pyrrhotite, gaseous sulfur, and oxygen. Bornite formation could be …
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Bornite, a copper-ore mineral, copper and iron sulfide (Cu5FeS4). Typical occurrences are found in Mount Lyell, Tasmania; Chile; Peru; and Butte, Mont., U.S. Bornite, one of the common copper minerals, forms isometric crystals but is seldom found in these forms. It alters readily upon weathering to
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The sulfide ores include bornite, chalcocite, covellite, and chalcopyrite, while the oxide ores consist of malachite, azurite, and cuprite. ... of geometallurgical modelling to mine planning in a copper-gold mining operation for improving ore quality and mineral processing efficiency. The Journal of African Institute of Mining and Metallurgy ...
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focus on (1)interficial interactions of metal sulfide mineral bioleaching; (2) rutile flotaion&metallurgy; (3) bioleaching industrial application
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The use of various electrochemical techniques to study mechanisms of sulfide mineral-flotation reagent interactions is briefly reviewed in this paper. Prior to such studies it is desirable to thermodynamically determine solution conditions favorable for formation of hydrophobic species deemed to be responsible for flotation. The thermodynamic …
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Since then, several plants ultilized seawater to process sulfide minerals (Drelich and Miller, 2012; Jeldres et al., 2016;Moreno et al., 2011). For instance, Las Luces, a Cu-Mo plant, employed ...
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Bornite forms as a primary hydrothermal precipitate or a later supergene replacement mineral. It occurs with other copper minerals such as covellite, malachite and azurite. It …
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Copper minerals can be broadly classified into sulfide minerals, oxide minerals, and native copper. The most common copper mineral is chalcopyrite, a sulfide mineral that contains about 34% copper by weight. Other important copper minerals include bornite, chalcocite, and malachite. These minerals can occur in a wide range of …
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High-molecular-weight polymers based on anionic polyacrylamides (PAMs) are used as tailing flocculants in mineral processing plants. The recirculation of water recovered from the tailing thickeners to the flotation process introduces residual PAMs, which can impact the flotation of important copper sulfides like chalcopyrite, bornite, …
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Flotation separation of chalcopyrite and molybdenite is an enormous challenge faced by mineral processing, since chalcopyrite is usually closely associated with molybdenite in porphyry copper-molybdenum deposits. ... Effect of H 2 O 2 and potassium amyl xanthate on separation of enargite and tennantite from chalcopyrite and …
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Replacement of pyrite by copper-bearing sulfides is widespread in mineral deposits, with zonation of chalcocite, bornite, and chalcopyrite being a common result of this process.
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Chalcopyrite, CuFeS 2, is an important source of copper and is recovered from ore by the flotation process. Chalcopyrite is commonly associated with other metal sulfides, e.g. bornite, Cu 5 FeS 4.In this study the effect of bornite on the oxidation and leaching of chalcopyrite has been investigated by probing the surface evolution of pure …
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Bornite is a copper iron sulfide mineral with a chemical composition of Cu 5 FeS 4. It occurs in igneous, metamorphic, and sedimentary rocks. Minable concentrations of bornite occur in hydrothermal veins, contact …
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Recoverable economic copper sulphide minerals such as chalcopyrite, bornite, chalcocite and covellite often occur together in varying proportions in the major copper-bearing ores, and have individual flotation requirements and characteristics. ... Proc. 12th International Mineral Processing Conference, Turkey, October 2010 (2010), pp. …
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The present work seeks to contribute to a better understanding of microscopic appearance transformation of bornite during acid leaching and bioleaching …
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Ceramic media were used to test the floatability of bornite without galvanic interaction with the grinding media. Fine bornite displayed significantly higher floatability, compared to …
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2.1.3. Dissolution of minerals. The dissolution experiment was divided into two batches. The first batch of dissolution experiments with marmatite and bornite at different mass ratios (marmatite: bornite = 2: 0, 3: 1, 1: 1, 1: 3 and 0: 2) was conducted in 250 mL flasks containing 99 mL sterilized 9K basal medium and 1 mL bacteria culture. In order to …
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The paper presents a study of the process of nitric acid dissolution of the natural minerals chalcopyrite and bornite. The influence of various parameters, including temperature, nitric acid ...
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A decomposition product of bornite is idaite. In terms of crystallochemistry, at temperatures above 228 °C, the crystal structure of bornite is isometric with copper and iron atoms …
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Bornite is an ore mineral of copper, and is known for its iridescent tarnish. "Peacock Ore", which is sold to amateur mineral collectors and tourists, is often labeled as a variety of Bornite.However, most Peacock Ore in reality is Chalcopyrite treated with acid, which produces a strongly-colored iridescent tarnish.Bornite is named for Ignatius von Born, …
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The electrochemical dissolution process of chalcopyrite and bornite in acid bacteria culture medium was investigated by electrochemical measurements and X-ray photoelectron spectroscopy (XPS) analysis. ... Shan ZHU 1,2, Wen-qing QIN 1,2, Guan-zhou QIU 1,2, Jun WANG 1,2 1. School of Minerals Processing and Bioengineering, …
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Carbon paste electroactive electrodes as a working electrode could be made by mixing minerals (chalcopyrite or bornite or mixture of chalcopyrite and bornite), graphite and solid paraffin ... Accompanying with new methods to pre-processing the solid minerals into solution phase, EC assays will be more appropriately used in analyzing …
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The electrochemical nature of mineral-collector interactions and their relationship to flotation have been investigated to develop a better understanding of the factors …
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Hydrometallurgy and biohydrometallurgy are considered as important mineral processing techniques in processing low grade ores as it is simple, low cost, and eco-friendly, but most studies focused on chalcopyrite [5,6,7] and few reports about bornite bioleaching have been published. As a secondary copper sulfide, bornite is an …
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Minerals 2018, 8, 173 2 of 22 regarded as a reverse biomineralization process. Therefore, the research on the surface transformation and dissolution process of bornite in the presence of ...
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In the chemical leaching process, the low rest potential minerals like bornite will be preferentially dissolved while pyrite will be protected as the cathode and the quality of pyrite is not significantly reduced, so it can be considered to act as catalysts (Ahmadi et al., 2012, Koleini et al., 2010). The addition of pyrite can significantly ...
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The electrochemical dissolution process of chalcopyrite and bornite in acid bacteria culture medium was investigated by electrochemical measurements and X-ray photoelectron spectroscopy (XPS) analysis. ... (Bio)Hydrometallurgy is a common technology in processing copper sulfide minerals. With the decline in ore grades and …
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Understanding of Cu–(Fe)-sulfide mineral chemistry has both processing and exploration implications in all the above deposit types. This is because knowledge of the minor and trace elements carried by a host sulfide, including bornite, is essential to evaluate the distribution and partitioning of potential economically-valuable components ...
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The surfaces of fresh and tarnished (through exposure to the atmosphere) bornite have been studied by measurement of reflectance and quantitative colour parameters in the visible region, X-ray photoelectron and Auger electron spectroscopy, and conversion electron Möss spectroscopy. ... International Journal of Mineral …
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