Evaluation of the Effect of Copper Electrowinning Parameters on Current Efficiency and Energy Consumption Using Surface Response Methodology

Khouraibchia, Youness; Moats, Michael S.

doi:10.1149/1.3367922

Cited by 11 publications

(3 citation statements)

References 7 publications

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“…Considering the obtained Fe concentration of 1.4 g/L in the stripped solution, the expected current efficiency is approximately 95%, which is in the upper limit of the industrial range of 85-95% [3] (p. 358). Current efficiency loss was determined to be 2.8% per g/L of ferric ions, which agrees with Khouraibchia and Moats [27] 's empirical model of current efficiency (Equation ( 7)) and Schlesinger et al, [3] (p. 361)'s findings that current efficiency drops by approximately 2.5% for each addition of 1 g/L of ferric ions. where j is the current density.…”

Section: Electrowinning Of the Simulated Stripped Solutionsupporting

confidence: 83%

Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process

Godirilwe

Haga

Altansukh

et al. 2021

Metals

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The flotation tailings obtained from Bor Copper Mine contain pyrite (FeS2) and chalcopyrite (CuFeS2), these sulfide minerals are known to promote acid mine drainage (AMD) which poses a serious threat to the environment and human health. This study focuses on the treatment of mine tailings to convert the AMD supporting minerals to more stable forms, while simultaneously valorizing the mine tailings. A combination of hydrometallurgical processes of high-pressure oxidative leaching (HPOL), solvent extraction (SX), and electrowinning (EW) were utilized to recover copper from mine tailings which contain about 0.3% Cu content. The HPOL process yielded a high copper leaching rate of 94.4% when water was used as a leaching medium. The copper leaching kinetics were promoted by the generation of sulfuric acid due to pyrite oxidation. It was also confirmed that a low iron concentration (1.4 g/L) and a high copper concentration (44.8 g/L) obtained in the stripped solution resulted in an improved copper electrodeposition current efficiency during copper electrowinning. Moreover, pyrite, which is primarily in the mine tailings, was converted into hematite after HPOL. A stability evaluation of the solid residue confirmed almost no elution of metal ions, confirming the reduced environmental loading of mine tailings through re-processing.

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Section: Electrowinning Of the Simulated Stripped Solutionsupporting

confidence: 83%

Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process

Godirilwe

Haga

Altansukh

et al. 2021

Metals

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“…4 (a) and (b) insets), indicating the complete removal of aqueous Cu. The results indicate that the initial concentration of Cu can influence the total removal efficiency significantly [23] and Ti/Ir-Ru electrode can be used as an anode for efficient removal of highly concentrated Cu in the wastewater owing to the enhanced physical and electrochemical properties as shown above.…”

Section: Electrowinning Process Using Ti/ir-ru Anodes Formentioning

confidence: 77%

Fabrication of Ti/Ir-Ru electrode by spin coating method for electrochemical removal of copper

Kim

Bae

2019

Environmental Engineering Research

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Recovery of valuable metals in the industrial wastewater and sludge has attracted an attention owing to limited metallic resources in the earth. In this study, we firstly fabricated Ti/Ir-Ru electrodes by spin coating technique for effective recovery of Cu in electrowinning process. Two different Ti/Ir-Ru electrodes were fabricated using 100 and 500 mM of precursors (i.e., Ir-Ru). SEM-EDX and AFM revealed that Ir and Ru were homogenously distributed on the surface of Ti plate by the spin coating, in particular the electrode prepared by 500 mM showed distinct boundary line between Ir-Ru layer and Ti substrate. XRD, XPS, and cyclic voltammetry also revealed that characteristics of IrO2, RuO2, and TiO2 and its electrocatalytic property increased as the concentration of coating precursor increased. Finally, we carried out Cu recovery experiments using two Ti/Ir-Ru as anodes in electrowinning process, showing that both anodes showed a complete removal of Cu (1 and 10 g/L) within 6 h reaction, but much higher kinetic rate constant was obtained by the anode prepared by 500 mM. The findings in this study can provide a fundamental knowledge for surface characteristics of Ti/Ir-Ru electrode prepared by spin coating method and its potential feasibility for effective electrowinning process.

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“…The literature is robust with applications, optimizations, additives and developments in this field [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Industrial Copper Electro Winning Solutions

G¹

2017

J Adv Chem Eng

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Journal of Advanced Chemical Engineering AbstractLaboratory testing using industrial electro winning solutions was performed to determine the best Faradic cell efficiency for copper cathode recovery. The variables tested were solution flow rate, recycle ratio, reagent addition combinations of guar and thiourea, and addition amount of acid mist suppressant CAL FAX DBA-70. The ideal flow rate was determined to be 37.85 liter/min. Additionally, the ideal recycle ratio was determined to be 10:1. The reagent addition scheme from testing which showed the highest efficiency was with 680 g/tonne guar of cathode copper won and with 135 g/tonne thiourea of cathode copper won. These values for reagent addition only reflect the best efficiency and should not be assumed to be the best reagent concentration for copper purity. The amount of foaming agent that showed the best efficiency was the test with 2 ppm of foaming agent. Again this amount of reagent is based on efficiency and should not be taken as the amount of reagent that does the best acid mist suppression. Additional proprietary surface characterization work indicates these additives may have enhanced the cathodic reduction surface morphology of some noble minor impurities. Subsequently, these operating parameters were introduced into the plant operation and proved successful after their implementation.

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Evaluation of the Effect of Copper Electrowinning Parameters on Current Efficiency and Energy Consumption Using Surface Response Methodology

Cited by 11 publications

References 7 publications

Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process

Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process

Fabrication of Ti/Ir-Ru electrode by spin coating method for electrochemical removal of copper

Optimization of Industrial Copper Electro Winning Solutions

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