Enhancement of copper metal dissolution in sulfuric acid …
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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An investigation into the leaching behaviour of copper …
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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In situ leaching of copper: Challenges and future prospects
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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Recovery of valuable elements from copper slag through …
To investigate the effect of sulfuric acid dosage on the leaching rate of elements from copper slag, experiments were conducted while controlling other curing conditions (curing …
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The leaching behavior of copper and iron recovery from …
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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A review of chloride assisted copper sulfide leaching by …
The beneficial effect of chloride on sulfide leaching in sulfuric acid has been widely reported over the last 3–4 decades but the reasons have not been resolved. A review of recent …
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Acid curing and agglomeration for heap leaching
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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Process improvement and kinetic study on copper …
sulfuric acid solution are presented in this paper. Effects of major leaching parameters on copper leaching efficiency are determined. The results indicate that copper minerals in the raw ores …
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Study of Factors Affecting the Copper Ore …
The use of this biochemical method in the copper leaching process resulted in a significant reduction in sulfuric acid consumption, by 40%, and a copper recovery rate of 87.2%. This paper provides an overview of …
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Leaching of Copper Ores: Effects of Operating Variables
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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Leaching of iron from copper tailings by sulfuric …
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 of Dolomitic-Copper Ore Using Sulphuric …
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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Kinetics of copper leaching from direct-to-blister copper …
The highest copper leaching efficiencies were obtained for the highest sulfuric acid concentration (200 g/l) and the next stage of the research was started with the assumption that …
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Kinetic Investigation on Leaching of Copper from a Low …
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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(i) PREPRINT
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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UNDERSTANDING ACID CONSUMPTION AND ITS …
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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Producing Copper Nature's Way: Bioleaching
Until recently, conventional acid-leaching of copper was utilized as a means of recovering copper from low-grade materials such as waste rock and flotation tailings and was conducted in dumps that were already in place. At least five …
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Separation of arsenic and extraction of zinc and copper from …
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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Copper Leaching Practices
Vat leaching principally employs the dissolution of copper oxide minerals by sulfuric acid from crushed, nonporous ore material that has been placed in confined tanks. This …
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Decopperization mechanism of copper anode slime …
When the sulfuric acid concentration is more than 150 g/L, the ascent of the leaching efficiency gradually slowed down. In general, the amount of sulfuric acid per unit …
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Sulfuric acid leaching for capturing value from copper rich …
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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The Leaching of Dolomitic-Copper Ore Using Sulphuric …
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). …
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Sulfuric acid leaching for capturing value from copper …
In this research, a hydrometallurgical method for recovery of copper from copper rich converter slag is investigated. The main copper containing phases of the slag are cuprite (Cu2O), …
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Selective Copper Recovery by Acid Leaching from Printed Circuit …
Two-stage leaching and evaporation were applied to extract and purify copper from copper-contaminated sludge: (i) in the first stage, 2.0 N sulfuric acid could leach out 95.2% Cu and …
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Copper leaching from complex chalcopyrite-rich ores: …
The suggested optimal conditions for copper leaching from complex sulfide ores involve a grinding time of 5 h, sulfuric acid concentration of 0.5 M, chloride concentration of 0.5 …
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Acid Leaching – Copper Ore Treatment Method
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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Agitated Copper Leaching & Cementation Process
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
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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Leaching of Copper Ores: Effects of Operating …
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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A comprehensive study of the leaching behavior and …
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 …
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