(i) Given below are the steps for extraction of copper from its ore. Write the reaction involved. (a) Roasting of copper (I) sulphide. (b) Reduction of copper (I) oxide with copper (I) sulphide. (c) Electrolytic refining. (ii) Draw a neat and well-labelled diagram for electrolytic refining of copper.
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Different methods are used to process copper sulfide ores depending on the concentration of copper within the ore — higher-concentrated ores can be separated via smelting, while...
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Herein, to improve the leaching rate of copper, an enhanced leaching test of refractory copper oxide ore from Luanshya was conducted using CaF 2 as a leaching aid. The effects of the sulfuric acid dosage, CaF 2 dosage, time, and temperature on leaching were also studied. The CaF 2-enhanced leaching of cupriferous biotite and phlogopite was theoretically …
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Concentration of ores is basically the removal of impurities known as gangue particles to increase the percentage concentration of the mineral. ... Mainly Tin and Lead oxide ores are separated by this ... The impurities settle at the bottom, and the froth is collected to extract minerals. Copper, lead, and Zinc sulphide ores are concentrated by ...
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Copper ore deposits are reported from igneous, sedimentary as well as metamorphic rocks. The ores generally occurs as veins, disseminations and as bedded deposits. The principal copper …
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The copper oxide ore occur in coarse grains locked in a porphyritic fine grain alumina and silica. 800 g of copper oxide ore was obtained at the deposit; the samples were …
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The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. ... The process proceeds from tank to tank with a continual decrease in acid strength and increase in copper concentration until it is finally withdrawn as pregnant solution from ...
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Subsequently, the recovery rate in froth flotation was measured depending on the initial copper concentration (0.95%). ... Processing oxide-sulfide copper ores using ammonium chloride. Russ. J. Non-Ferrous Met., 51 (2010), pp. 377-381, 10.3103/s1067821210050019. View in Scopus Google Scholar.
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Keywords: Oxide and sulphide copper ore, processing, mixtures. 1 Introduction. This . The leaching of a copper oxide and sulphide cop. ... parameters namely temperature, concentration of NaNO. 3. and H. 2. SO. 4. Also, the influence of . ferric ion on the leaching of chalcopyrite was investigated [2]. It was found that ferric iron plays
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Concentration of Ores. The very first step, which is the concentration of ore, involves the removal of gangue particles that can be achieved using gravity separation, froth floatation, magnetic separation, and leaching processes. ... When copper oxide is heated in presence of hydrogen, copper oxide is reduced to copper: ...
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About 80% of the world's copper-from-ore originates in Cu-Fe-S ores, such as chalcopyrite (CuFeS2) and chalcocite (Cu2S). The concentration of these minerals in an ore body is low. …
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Cuprite type copper oxide ore. Cuprite-type copper oxide ore is dominated by cuprite and malachite, with high copper grade. No matter what type of gangue, it can be processed by flotation. Brochantite type copper oxide ore. Brochantite type copper oxide ore is dominated by copper alum minerals. It is a middle-difficult-to-beneficiate copper ...
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In this study, response surface methodology (RSM) and Box-Behnken design to improve copper extraction from refractory copper oxide ore were investigated. Based on single factor tests, quadratic polynomial equation to describe the relationship between influencing factors (particle size, leaching temperature, sulfuric acid concentration, leaching time) and copper …
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Copper oxide ores are mainly malachite and azurite, followed by chrysocolla and cuprite, copper sulfate and other soluble salts of copper. Malachite Cu2CO3(OH)2 Malachite ore can be beneficiated by sulfurization …
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The oxidation of copper mineral dissolves to generate copper sulphate that will be replaced with iron filings to restore copper ions to metallic copper for precipitation. Finally, float …
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Reduction of "oxide copper", by acid leaching prior the flotation concentration, can increase the overall copper efficiency up to more than 70% in the single-stage leaching, achieving an ...
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Concentration of Gold-Bearing Ores and Processing of Concentr ates: A Review, Miner al Processing and Extractive Metallurgy Revie w, DOI: 10.1080/08827508.2024.2395824 To link to this article ...
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Top 5 Ores of Copper (Cu) - Malachite, Azurite, Copper Pyrite, Cuprite, and Copper Glance. properties, extraction processes, industrial applications. ... Oxide Ores and Sulfide Ores. Let's examine the key ores of copper and their characteristics. 1. Malachite (CuCO₃·Cu(OH)₂) ... Step 1: Concentration of Ore. The ore is crushed and ...
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Chalcocite: Chalcocite (Cu2S) is a dark-colored copper ore mineral that is often found in the oxidized zones of copper deposits. It is a secondary copper mineral that forms through the weathering and alteration of primary …
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Appropriate concentration of ammonium salt can improve the sulfurization environment during copper oxide sulfide flotation ... Moreover, when metal ions are combined with ammonium salts, they can further improve the sulfidation degree of copper oxide ores. In the context of direct flotation, metal ions can engage with chelating agents ...
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The dissolution of carbonate gangue minerals, which are often ubiquitous in copper deposits, leads to the consumption of large amounts of acid during the leaching of such ores, which can make the process uneconomical (Habashi, 1970, Habashi, 1980, You-Cai et al., 2013).Table 1 shows the acid consumption and estimated time to complete the dissolution of …
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57 1 ABSTRACT Oxide copper ores in subdivided form may be concentrated in a flotation separation process by slurrying said ores in an aqueous solution of a flotation reagent followed by generating gas bubbles in the slurry to float the oxide copper and recovering the concentrated oxide copper from the surface of the slurry, wherein the flotation reagent is a quaternary …
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1. Roasting: Copper glance, being a sulphide ore, is heated in the presence of air. Copper (I) sulphide is converted to copper (I) oxide. Copper (I) oxide, so formed, reacts with non-oxidised copper (I) sulphide ore in the absence of air to form copper metal. When the mixture of Cu 2 O and Cu 2 S is heated, they react together to give copper ...
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In this investigation, a laboratory-scale study to extract copper (Cu) from its oxide ore (0.425–11.2 mm particle size) was conducted using varied sulfuric acid (H2SO4) concentrations (0.05–0.5 M) as a lixiviant. Through a physicochemical and mineralogical analysis of real field ore samples from the Almalyk mine heap site (Tashkent, Uzbekistan), malachite …
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Sulfamic acid (SA), which possesses a zwitterionic structure, was applied as a leaching reagent for the first time for extracting copper from copper oxide ore. The effects of reaction time, temperature, particle size, reagent concentration, and stirring speed on this leaching were studied. The dissolution kinetics of malachite was illustrated with a three …
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Explore the key differences between copper ore and copper concentrate. Learn about their characteristics, processing stages, applications, and significance in industries like …
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Low-grade sulfide ores are subjected to concentration operations, which include flotation, to obtain dry concentrates of around 30% of copper with 10–200 μm of grain size . ... As leaching agents, it is usual to employ diluted sulfuric acid (for copper oxide ores, carbonates, basic sulfates, and silicates), ...
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the dissolution rate of copper increases with increasing L/S ratio to a certain amount and, then, reduces with a further increment; moreover, a Liquid/Solid (L/S) Figure 2. E ect of liquid-to-solid (L/S) ratio on the dissolution of copper oxide ore. Figure 3. E ect of sulphuric acid concentration on the dissolution of copper oxide ore.
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The copper oxide ore occur in coarse grains locked in a porphyritic fine grain alumina and silica. 800 g of copper oxide ore was obtained at the deposit; the samples were chemically and mineralogically analyzed. ... 000â€"000 3.3. Effect of the Concentration of Acid Figure 1 shows high concentration of copper in the copper oxide at the ...
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Copper Mining: 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 …
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This review is divided into two sections dealing with the gravity concentration of ores and the processing of gold-bearing gravity concentrates. ... but it might be mercury with antimony oxide (Hg 2 Sb 2 O 7), known as ... and …
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The copper-cobalt ore received from Congo contains around 2.0% copper and 0.356% cobalt, with oxidation rates of 92.09% and 88.57% for Cu and Co, respectively. Malachite and cornetite are the main copper minerals, while heterogenite and carrollite are the main Co-bearing minerals. To optimize the leaching efficiency of Cu and Co for this type of ore, various …
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The Democratic Republic of Congo copper oxide ore containing mainly malachite was leached in sulphuric acid. The effects of leaching time, pH, stirring speed, and temperature on the dissolution ...
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Concentration of Ores. In the ore-dressing plant, mined material is crushed in multiple stages and finely milled to release copper minerals from waste material, called gangue. ... In situations where the next stage is leaching (most often with oxide ores), total liberation of the copper minerals is not necessarily required; the ore just has to ...
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Agitation leaching is a promising technology in hydrometallurgy for treating copper–cobalt oxide ores. In this work, the behavior of oxide ores containing around 2.3% Cu and 0.3% Co received from Congo was investigated for varying particle size, acidity, pulp density, temperature, leaching time, and reduction potential. XRD, optical microscopy (OM), and ICP …
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The first phase, mineral processing, is to release the copper minerals and remove waste elements, such as alumina, limestone, pyrite, and silica, in order to concentrate the copper minerals and other nonferrous …
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