of leaching of copper ore with hydrochloric acid or sulfuric acid, increases with temperature and acid concentration, while it decreases with increasing particle size. ... to determine the …
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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, …
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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 …
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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.
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Similar to copper oxide heap leaching, also using dilute sulfuric acid. The final product is yellowcake ((U_3O_8)) and requires significant further processing to produce fuel-grade feed. …
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Meanwhile, the Copper leaching with sulfuric acid from solid waste (e.g. flash furnace dust (Rios et al., 2021), copper smelting slag (Shi et al., 2020)) have been researched …
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Sulfuric acid (1.14 M made from reagent grade stock) was added at a rate of 40 microliters per minute using a syringe pump. The pH was monitored using a pH electrode throughout the …
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The sulphuric acid was found to be effective in recovering copper from chalcopyrite with efficiencies of 72 to 93 % for 75 micron particle size and 65 to 84% for the 212 micron sieve …
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strengths of sulfuric acid solutions. Sloan (1934) has evaluated a number of different analytical methods employing sulfuric acid leaching. Several of these methods or variations of these …
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Copper oxide ore; Leaching behavior; Recovery; Kinetics; Shrinking core model; Optimization. Abstract. The leaching behavior of an Iranian copper oxide ore in sulphuric acid was …
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The influence of NaNO 3 concentration on the copper leaching degree was determined in a NaNO 3 concentration range from 0.15 to 0.60 mol dm −3 and a time frame …
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ium cyanide. Results from sequential analyses of the sample and analytical residue using sulfuric acid followed by sodium cyanide and then aqua regia solutions when compared with …
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Look at the concentrated sulfuric acid cell used to remove gold plate from copper we passivate the copper (here we can actually use a copper screen wire as an anode basket, …
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In general, these investigations indicated that sulfuric acid leaching was the most practical and commonly used method to extract the metals from low-grade resources due to …
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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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Sulfuric acid leaching of lead smelter mattes resulted in the recovery of about 45 pct of the nickel and cobalt and 10 to 45 pct of the copper. The addition of manganese dioxide increased the cobalt and nickel recovery …
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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 …
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Santos subsequently employed a Doehlert experimental design to optimize the leaching process, identifying ideal parameters: 9.8% H 2 SO 4 (w / w) (1M of sulfuric acid), 10 h …
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In one process, a solution of sulfuric acid laden with copper sulfate is stripped of copper via a solvent extraction and electro winning with the used sulfuric acid recycled back into the …
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The most leaching agent in the hydrometallurgical industry is an inorganic acid, including sulfuric acid, nitric acid, hydrochloric acid, and phosphoric acid (Fu et al., 2019, Yu et …
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150 kg solid/m 3 and 4–6 h of leaching under oxidizing conditions. In comparison, the leaching of the copper smelter dust was relatively easy. Bzura (1979), studied the recovery …
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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 …
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In situ leaching has been applied for supplemental recovery of copper from established open pit and underground mines using both sulfuric acid and acidic ferric sulfate …
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The magnesium sulfate and part of the iron sulfate were produced from the reaction of clinochlore with sulfuric acid while the copper sulfate was probably produced by the reaction …
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The leaching of copper tailings in the sulfuric acid solution may involve the reactions shown in eqn (5)–(10). 11,24,25 The Gibbs free energy (Δ G °) is calculated to be −101.81 kJ mol −1 for Fe 3 O 4, −203.58 kJ mol −1 for Fe 2 …
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The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The …
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The copper leaching became obviously slow when the 70 ∼ 80% copper sulfides was extracted. This is because there are passivation layers like the elemental sulfur attached …
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A new method for copper metal dissolution by simultaneous use of oxygen and ultrasound was proposed to enhance the copper dissolution rate in sulfuric acid (H 2 SO 4).The …
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Sulfuric acid concentration, leaching time, leaching temperature and oxidant addition had important effects on zinc and copper extraction from the alkali leaching residues. 97.23% …
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The chemical leaching columns were subject to diluted sulfuric acid conditioning at a feeding rate of 5 L/h·m 2 in closed circuit for 24 h until reaching pH 1.4 in the effluent. Later, …
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