Copper electrowinning in a moving-bed cell based on reactive electrodialysis

Cifuentes, Luis Fernández; Arriagada, Paulo

doi:10.3989/revmetalm.2008.v44.i2.103

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Among the several types of electrodes, the particulate electrode has been used intensively for metal removal from aqueous effluents due to its high specific surface area and mass transfer coefficients, which are requisites necessary to electrodeposit metal ions from diluted solutions . Particulate electrodes are composed of conductive particles that can be packed,, fluidized, or circulated to form the porous cathode. Packed bed electrodes are very efficient for metal electrodeposition since the particles are constantly in contact with each other; however, its main disadvantage is electrode clogging due to the electrodeposited metal in the electrode pores , .…”

Section: Introductionmentioning

confidence: 99%

Box–Behnken factorial design study of the variables affecting metal electrodeposition in membraneless fluidized bed electrodes

Tonini

Farinos

Prado

et al. 2012

J of Chemical Tech & Biotech

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BACKGROUND: Heavy metal removal from industrial wastewaters has been studied intensively since it is well known that they can cause severe problems to human health and aquatic life, even at very low concentrations. Traditional precipitation or adsorption technologies only transfer the problem to the solid phase, therefore new technologies, such as electrodeposition using fluidized bed electrodes (FBE), have been considered to avoid contamination. RESULTS: Copper electrodeposition from diluted solutions was carried out using a membraneless FBE. The supporting electrolyte concentration (Cs) was the main variable affecting the current efficiency (CE), energy consumption (EC), and space‐time yield (Y). Although it does not change the response surface morphology, increasing Cs there was an important improvement of CE, Y, and EC. The effects of current and bed expansion are much more complex, since an interaction effect between these two variables was verified. Considering only the region of active kinetic control, copper can be optimally recovered with CE > 90%, Y ∼93 kg h−1 m−3, and EC ∼3.2 kWh kg−1 by applying the highest levels of the independent variables. CONCLUSIONS: The results suggest that electrodeposition using a membraneless FBE is an excellent method for the treatment of effluents contaminated with copper or other metals. © 2012 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Box–Behnken factorial design study of the variables affecting metal electrodeposition in membraneless fluidized bed electrodes

Tonini

Farinos

Prado

et al. 2012

J of Chemical Tech & Biotech

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“…Beukes and Badenhorst (2009) investigated the relationships, equations, and mass transfer coefficients of various industrial cells in a study. Cifuentes and Arriagada (2008) investigated factors such as temperature, electric current, concentration, and rotation speed of the bed on the mass transfer of an electrowinning cell with a moving bed and showed that increasing the temperature and concentration of copper increased the mass transfer. Najminoori et al (2019) examined the effect of the magnetic field with designing full-scale experiment considering factors such as copper and iron concentration, electric current density, presence, and absence of magnetic field, and thickness and morphology of structures formed on copper.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Simulation of Two-Phase Flow in an Industrial Electrowinning Cell with New Scheme

Pourahmadi

Talebi

2021

JAFM

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Electrowinning is the process of depositing copper of the electrolyte solution inside the cell to the cathode. In the present study, the hydrodynamic simulation of the electrowinning cell of Miduk Copper Complex is studied using computational fluid dynamics. The Navier-Stokes and continuity equations are considered in the form of two phases of fluid and gas, turbulent, incompressible and steady state, and the equation for copper concentration in the electrolyte is solved with consideration of its specific boundary condition. The flow turbulence is modeled using 𝐾 − 𝜔 relationships. Due to large variations in the properties near cathode and anode, and also the large size of the electrowinning cell, to create a good grid, and increase the speed and accuracy of the results, global and local simulations are used together. The results of this simulation are the velocity vectors, the concentrations of acid and copper, turbulence Intensity, the amount of pressure, and the volume ratio of the oxygen phase in the entire electrowinning cell domain. For model validation, the model is compared with experiments conducted on actual cells in the industry. Results show high accuracy of this modeling technique. Then, the mass transfer coefficient values for the different electrode intervals are obtained by this modeling and the results are validated using the results of the experimental relations. In the next step, the electrolyte mixture containing different mass fractions of oxygen is sprayed into the electrowinning cell from the inlet of the simulated cell. Finally, effect of sparging different mass fraction of oxygen into electrowinning cell electrolyte, changing inlet temperature and flow rate of the electrolyte on the mass transfer coefficient is investigated by the obtained model.

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