Acid consumption were achieved between 18 to 54 kg per ton of ore. Acid solution concentration and irrigation flow rate are the most important parameters on the copper and iron recoveries. By increasing of leaching period Copper extraction will increase, but acid will be waste more. Copper and iron recoveries were increased with
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What we claim as our invention is 1. A process for the direct recovery of copper from its ores and concentrates which comprises agitating a slurry of finely ground copper sulfidecontaining ore or concentrate in a solution of ferric chloride and hydrochloric acid in the anode compartment of an electrolytic cell, said cell having first and second hode compartments and an anode compartment ...
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By characterizing the dissolution kinetics of chalcocite, covellite, bornite, enargite, chalcopyrite, and pyrite concentrates, we found that alkaline cyanidation (and not hydrogen peroxide or acid leaching in the presence of oxidizing agents) selectively dissolves supergene copper sulfides, which can be applied in a sequential extraction scheme to estimate the sulfide mineralogy of tailings ...
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One of the important subject in copper sulfide leaching, Ore Characterisation and . Cement copper is extracted from leachete with sulphuric acid using scrap. A Review on Novel Techniques for Chalcopyrite Ore Processing Jan 1, 2012 . It is not only the most abundant of copper sulfides, ...
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flow sheet for a sulfuric copper ore extractiion plant. so acid will be saved in the leaching process if copper sulphate is copper from ore. The extraction of copper from ore . Inquire Now; Leaching of a gold bearing partially roasted sulphide ...
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Acid Leaching Copper Ore Treatment Method. The flowsheet discussed in this study is for treatment of 100 tons per day oxidesulfide copper ore by the leaching process using sulfuric acidferric 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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Three copper sulphide leaching processes are discussed in the sections that follow. Total pressure oxidation ... At hightemperature pressure leaching conditions, the formation of sulphuric acid from sulphides in the ore is favoured, however at medium and lowtemperature conditions (150–165oC and >140oC, respectively) ...
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· Acid Leaching – Copper Ore Treatment Method. The treatment of copper ores, both oxides and sulfides by means of flotation, hydrometallurgy or other processes has been well established for many years. Flotation has been applied generally to the treatment of sulfide ores, both in small and large scale operations.
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Pyroprocessing Sulfide Ores Provides Acid for Leaching The process used to treat sulfide copper ores begins at the mine site, ... Leaching of sulfide copper ore in a NaClH2SO4O2 media ... The leaching of sulfide copper ores of the djurleite and digenite type was effective through agglomerative pretreatment with H 2 SO 4 ...
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Advances in hightemperature heap leaching of refractory copper sulphide ores by Robertson*, van Staden*, and A. Seyedbagheri* Synopsis Acid heap leaching has been extensively applied to the processing of copper oxide ores, with recovery of copper by solvent extraction and electrowinning. Heap leaching has also been extended to the
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Sulfide Pressure Oxidation Pressure leaching of sulfide ores is complied by many items such as sulfur viscosity and the passivation of reactive surfaces. "Low" temperature conditions (100o C to 140o C) are generally not used in sulfide pressure leaching as this temperature range is conducive to formation of liquid elemental sulfur.
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Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done by giving the sulphide ore an oxidizingsulphatizing roast. Copper sulphate is soluble in water, so acid will be saved in the leaching process if ...
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A review of chloride assisted copper sulfide leaching by oxygenated sulfuric acid and mechanistic considerations G. Senanayake* Parker Centre, Faculty of Minerals and Energy, Murdoch University, Perth, WA 6150, Australia Abstract The beneficial effect .
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The acid leaching of nickel and copper from sulphidic ore in the presence of pyrite by SOUTHWOOD* SYNOPSIS Experiments carried out under atmospheric pressure and temperature (25°C) and sterile conditions show that the dissolution rate of nickel and copper from a pyrrhotitepentlanditechalcopyrite ore in a lixiviant of sulphuric acid is ...
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Selective leaching of the copper ore is based on chemical reactions between sulfuric acid and calcium as well as magnesium carbonate minerals (dolomite). Dolomite is a dominating gangue component of the Polish copper ores. This process, called either acid leaching or nonoxidative leaching, relies on treatment of the ore with lessthan
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of copper from lowgrade sulfide ores by bioleaching is essential. The physical, chemical, and microbial factors involved in a leaching environment, thecharacteristics of ore for leaching, and the type of leaching process are the most important factors affecting the microbial oxidation of metals. Some
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Bioleaching of copper sulphide ore by a microbial consortium isolated from acid mine drainage: Influence of [Fe 2+ ] *SalcedoMejía Luis 1a, RamírezOsco Luis 1b, CayoGonzales Hans 1c Arias ...
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Bacterial ore leaching can be applied to extract heavy metals from low grade ores, industrial wastes and other materials on an industrial scale by different procedures: dump leaching, in situ leaching, tank leaching, leaching in suspension. Sulfidic copper and uranium ores are the principle ores leached in several countries.
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