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The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, particle size, temperature and pH on the recovery of copper from chalcopyrite.
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This study examines the potential for use of biogenic sulphuric acid for leaching of a low-grade Brazilian ore containing 0.64% copper occurring as brochantite, Cu 4 SO 4 (OH) 6, …
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A new concept for copper (Cu) metal leaching by the simultaneous use of cupric ions (Cu2+) and oxygen (O2) was proposed to improve Cu metal leaching in sulfuric acid. According to this concept, Cu2+ oxidizes Cu metal into cuprous ion (Cu+), and O2 oxidizes Cu+ into Cu2+. The improvement in Cu leaching efficiency from Cu metal was investigated …
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As can be seen from the above data, sulfuric acid is most suitable for leaching off-balance oxidized ores. Sulfuric acid is a good solvent of oxidized copper minerals (Cu 2O, CuO). And sulfuric acid is characterized by low cost and has relatively low corrosion effect on hydrometallurgical equipment. III. OBJECTS AND METHODS OF RESEARCH
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Heap leaching & SX-EW is a method of extracting pure copper from oxide ore by placing the crushed ore on a pad in a heap and spraying the leaching solution, sulphuric acid, over the heap. The acid trickles through the heap and dissolves the copper mineral into solution. The leach solution collects at the bottom of the pad in a collection pond.
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Heap leaching & SX-EW is a method of extracting pure copper from oxide ore by placing the crushed ore on a pad in a heap and spraying the leaching solution, sulphuric acid, over the …
WhatsApp: +86 18221755073
Leaching of copper from a Jordanian copper ore has been studied using a stirred batch reactor with hydrochloric acid as the main lixiviant, under the following conditions: temperature 25 – 45 oC ...
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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. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment.
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of 23.279 kJ/mol. Seo et al. [28] reported that the leaching kinetics of a Cu-Co ore in the sulfuric acid and hydrogen peroxide system followed the shrinking core model, of which the controlling factor is the diffusion of the reac-tants through a product layer. Wang et al. [29] applied the sulfuric acid leaching process to recover the copper
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Recent focus on hydrometallurgical methods for non-sulfide copper ores prompted a study on leaching a copper oxide ore containing 2.22% Cu, 44.9% SiO2, 6.94% Al, 6.61% …
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parallel reactivity of dolomitic-copper with sulphuric acid was not demonstrated [14]. A comparison of the effect of low and high dolomite on leaching of copper was not found in literature. Fig. (1). The shrinking core model for the leaching of dolomitic-copper ore. The ions from the acid migrate by diffusion from bulk
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For instance, Liu et al. found that the leaching kinetics of a low-grade complex copper ore in ammonia-ammonium chloride solution followed the diffusion process with the activation energy of 23.279 kJ/mol. Seo et al. reported that the leaching kinetics of a Cu-Co ore in the sulfuric acid and hydrogen peroxide system followed the shrinking core ...
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Abstract: The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, particle size, temperature and pH on the recovery of copper from chalcopyrite.
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There is a significant number of literature reports on leaching of copper oxide ores in sulfuric acid solutions [7,8,9], processing of flotation waste in H 2 SO 4 solutions [10, 11], recovery of copper from waste of electrical [12, 13] and electronic equipment (WEEE) [14, 15] or extraction of copper from spent catalyst [16,17,18].
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About 91% copper content was leached in 13% sul-phuric acid concentration, stirring rate of 600 rpm, liquid/solid ratio of 10 mL/g, and 50 C after 80 min leaching. The dissolution kinetics was examined according to heterogeneous models.
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Chalcopyrite is the main mineral source of copper ore for extracting and producing copper. However, with the continuous mining of copper ore, the grade of chalcopyrite decreases year by year and its composition becomes more and more complex. The traditional pyrometallurgical extraction process has been unable to make efficient use of such resources, and it is …
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of leaching of copper ore with hydrochloric acid or sulfuric acid, increases with temperature and acid concentration, while it decreases with increasing particle size.
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The method of dissolution by sulfuric acid and ferric sulfate with chemical precipitation by means of scrap or sponge iron appears to offer the best potential for wide application and low costs. Its basic chemistry is not complex but its economic application is dependent on handling of …
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Sulfuric acid leaching of copper rich slag with the optimized parameters can provide a copper rich process solution with iron as the main impurity metal. The solution can provide …
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As can be seen from the above data, sulfuric acid is most suitable for leaching off-balance oxidized ores. Sulfuric acid is a good solvent of oxidized copper minerals (Cu 2O, CuO). And …
WhatsApp: +86 18221755073
About 91% copper content was leached in 13% sul-phuric acid concentration, stirring rate of 600 rpm, liquid/solid ratio of 10 mL/g, and 50 C after 80 min leaching. The dissolution kinetics was …
WhatsApp: +86 18221755073
In this study, weak acid in the curing and leaching stages of copper ore was incorporated, and we analyzed its effect on the dissolution of copper and final impurities. The weak acid corresponds to a wastewater effluent from sulfuric acid plants produced in the gas treatment of copper smelting processes. This effluent is basically water with high acidity (pH-value low at 1), which contains ...
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The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even though oxidation can be done thermally (pyrometallurgy), solution-based (hydrometallurgical) methods are currently sought as they represent a more sustainable option. Here, the leaching of a …
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Abstract: The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, …
WhatsApp: +86 18221755073
Sulfuric acid leaching of copper rich slag with the optimized parameters can provide a copper rich process solution with iron as the main impurity metal. The solution can provide an attractive feed for integration into the industrial primary copper production with acceptable low Ni, As and Pb levels (43.6 g/L Cu, 9.4 g/L Fe, 0.3 g/L Ni, 0.1 g/L ...
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The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, particle size, …
WhatsApp: +86 18221755073
This study examines the potential for use of biogenic sulphuric acid for leaching of a low-grade Brazilian ore containing 0.64% copper occurring as brochantite, Cu 4 SO 4 (OH) 6, and as malachite, Cu 2 CO 3 (OH) 2. Ore was agglomerated with elemental sulphur and sulphur-oxidizing microorganisms.
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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. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment. ... The source of sulphuric acid for leaching is usually a major ...
WhatsApp: +86 18221755073
Recent focus on hydrometallurgical methods for non-sulfide copper ores prompted a study on leaching a copper oxide ore containing 2.22% Cu, 44.9% SiO2, 6.94% Al, 6.61% Fe, 6.25% Mg, 3.67% Ca, and 1.7% Na with H2SO4 for gaining insight into the behavior of impurities in the leaching process.
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