An Experimental Review of the Physicochemical Properties of Copper Electrowinning Electrolytes

Chibwe, Chalwe; Tadie, M.

doi:10.1007/s42461-021-00401-2

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…These latter complexes are usually preferred electrolytes for further downstream electrowinning processes, since the sulphate anion provides high conductivity. 79,80…”

Section: Resultsmentioning

confidence: 99%

“…These latter complexes are usually preferred electrolytes for further downstream electrowinning processes, since the sulphate anion provides high conductivity. 79,80 On the one hand, lithium will not negatively affect the electrowinning process of cobalt, due to its lower standard reduction potential. [81][82][83] Moreover, cobalt can be separated from lithium by producing cobalt oxalate precipitates.…”

Section: Comparison With Conventional Lco Leaching By Sulphuric Acidmentioning

confidence: 99%

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Recovery of cobalt from lithium-ion battery cathode material by combining solvoleaching and solvent extraction

2022

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“…These latter complexes are usually preferred electrolytes for further downstream electrowinning processes, since the sulphate anion provides high conductivity. 79,80…”

Section: Resultsmentioning

confidence: 99%

Section: Comparison With Conventional Lco Leaching By Sulphuric Acidmentioning

confidence: 99%

Recovery of cobalt from lithium-ion battery cathode material by combining solvoleaching and solvent extraction

2022

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“…In copper electrowinning production, cathode copper is produced through the leaching-extraction-electrowinning process; in the electrolyte, the insoluble lead-alloy plate (Pb-Ca-Sn) is used as the anode, and the thin copper starting sheet is used as the cathode. In essence, copper electrowinning is the process where copper ion is reduced by DC and deposited on the cathode [25,26]. Main reactions are as follows.…”

Section: Copper Electrowinning Processmentioning

confidence: 99%

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

Cui

Liu

Cheng

et al. 2021

Mathematical Problems in Engineering

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Because the harmonics in the production process of copper electrowinning have an important impact on the electrical energy consumption, it is necessary to suppress the harmonics effectively. In this paper, a copper electrowinning rectifier with double inverse star circuit is selected as a study object in which a large number of harmonics mainly including the 5th, 7th, 11th, and 13th harmonics are generated and injected back into the power grid. The total harmonic distortion rate of the power grid is up to 29.19% before filtering. Therefore, a method combining the induction filtering method and the active filtering method is proposed to carry out comprehensive filtering. Simulation results demonstrate that the total harmonic distortion rate of the system decreases to 4.20%, which indicates that the proposed method can track the corresponding changes of harmonics when the load changes in real time and filter them out. In order to ensure and improve the effect of active filter, a current harmonic tracking control method based on linear active disturbance rejection control is proposed. Simulation results show that the total harmonic distortion rate decreases to 3.34%, which is also lower than that of hysteresis control. Compared with the conventional single filtering method, the new filtering method combining induction filtering with active filtering based on linear active disturbance rejection control in the copper electrowinning rectifier has obvious advantages.

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“…Minimizing the concentration of iron reduces the consumption of current by this reaction. Therefore, an efficient purification process to remove impurities from PLS solution is essential [2][3][4][5][6]. (c) Proper anode and cathode material selection is essential to fulfill main requirements of lowest overpotential, good quality of the deposited copper in the cathode [7] and minimum electrode corrosion rate [8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

Cáceres,

Soliz,

Galleguillos-Madrid

2024

Metals

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In Northern Chile, large amounts of highly corrosive solutions are currently generated in the process of cathode washing after completing the electrowinning or electrorefining process of copper. This study investigates the electrochemical behavior of ASTM A36 carbon steel in pregnant-leach-solution (PLS) wash water. Measurements of electrochemical impedance spectroscopy and linear sweep voltammetry, complemented with weight loss measurements, were performed. Four ratios of PLS containing reverse osmosis (RO) water are evaluated, considering both quiescent and rotating conditions of the steel specimen. The results indicate that oxygen reduction, hydrogen evolution, and iron oxidation reactions are all involved during the corrosion of carbon steel in pure RO water, with the corrosion rate increasing up to 4 times under rotating conditions. In the case of corrosion in RO wash water containing PLS, a galvanic process occurs whereby copper is reduced at the expense of iron oxidation, superimposed on former partial reactions. The deposited copper induces notable corrosion inhibition of steel, observed as a significant drop in corrosion rate from high initial to constant residual values. Morphological and X-ray analyses support that corrosion is affected by oxide layer formation and galvanic copper deposition, confirming the results obtained from electrochemical analysis and weight loss measurements.

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An Experimental Review of the Physicochemical Properties of Copper Electrowinning Electrolytes

Cited by 10 publications

References 21 publications

Recovery of cobalt from lithium-ion battery cathode material by combining solvoleaching and solvent extraction

Recovery of cobalt from lithium-ion battery cathode material by combining solvoleaching and solvent extraction

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

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