Application and optimisation studies of a zinc electrowinning process simulation

Mahon, Michael; Peng, Spencer; Alfantazi, Akram

doi:10.1002/cjce.21880

Cited by 23 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To achieve the uniformity of cathodic current distribution, a previous work in [6] performed a parametric study based on an empirical way, and obtained an improved cell design. There, the only effect of the edge strip locations of cathodes was investigated, whereas other geometric parameters relating to the whole cell structure were fixed.…”

Section: Resultsmentioning

confidence: 99%

“…The Butler-Volmer expression of (5) is used to establish a quantitative relationship between the electrode reaction kinetics and its current [1,6,7]. 0 exp exp…”

Section: Mathematical Modelmentioning

confidence: 99%

“…According to (7), the equilibrium potential values of 1.247 V and 0.016 V are respectively obtained for the two cathodic reactions of (2) and (3), while the other value for the anodic reaction of (4) is -0.797 V. The Laplace equation of (1) is solved with the electrolyte-electrode boundary interface of (5), above electrode reactions and applied potential value f s of 3.597 V. The other detailed simulation conditions comply with [6] and [7].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…It is revealed that the zinc cell house is responsible for approximately 80% of the energy used by an electrolytic zinc refinery. Thus, intensive research has been conducted to lower energy consumption or increase current efficiency per mass of zinc produced [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is difficult to define a global optimum for the cell house. Meanwhile, Bouzek et al in [6] investigated the effects of current distribution flowing through an electrolyte between the anode and cathode on zinc electrodeposition, mathematically and experimentally. It is concluded that the quantity and morphology of electrodeposits strongly depends on the current distribution between electrodes.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

Choi¹,

Kim²,

Cho³

et al. 2015

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-In this paper, a zinc electrowinning cell is fully optimized to achieve a uniform current distribution at electrode surfaces. To effectively deal with an electromagnetically coupled problem with multi-dimensional design variables, a sampling-based sensitivity approach is combined with a highly tuned multiphysics simulation model. The model involves the interrelation between electrochemical reactions and electromagnetic phenomena so as to predict accurate current distributions in the electrowinning cell. In the sampling-based sensitivity approach, Kriging-based surrogate models are generated in a local window, and accordingly their sensitivity values are extracted. Such unique design strategy facilitates optimizing very complicated multiphysics and multi-dimensional design problems. Finally, ten design variables deciding the electrolytic cell structure are optimized, and then the uniformity of current distribution in the optimized cell is examined through the comparison with existing cell designs.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The Butler-Volmer expression of (5) is used to establish a quantitative relationship between the electrode reaction kinetics and its current [1,6,7]. 0 exp exp…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

Choi¹,

Kim²,

Cho³

et al. 2015

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

show abstract

Improving Current Efficiency Through Optimizing Electrolyte Flow in Zinc Electrowinning Cell

Wang¹,

Xia²,

Yang³

et al. 2016

CFD Modeling and Simulation in Materials Processing 2016

View full text Add to dashboard Cite

Experimental and numerical investigation of two‐phase flow patterns in magnesium electrolysis cell with non‐uniform current density distribution

Liu

Sun

et al. 2015

Can J Chem Eng

View full text Add to dashboard Cite

In a magnesium electrolysis cell, the electrolyte flow pattern can be affected by the chlorine gas bubbles release from the anodes. A 2D gas‐liquid mathematical model was developed to simulate the liquid velocity and gas volume fraction. A Particle Image Velocimetry (PIV) experimental set‐up was employed to determine the characteristics of velocity field in a cold model and to validate the mathematical model. The numerical results show good agreement with the experimental data. The local production rate of gas evolution is related to the anode current density according to Faraday's law. To make the bubble generation close to the reality, the non‐uniform current density distribution over the anode surfaces, derived from the thermoelectric model, has been added to the gas‐liquid model as initial boundary conditions. According to the analysis, the use of non‐uniform conditions is necessary. The flow patterns in the side channels are found to be quite different from that in the middle channels, where the velocity is much lower. It is noted that both current intensity and bubble size can significantly affect the velocity field and gas volume fraction distributions. The velocity can be increased with higher current intensities and larger bubble size, and the gas volume fraction can be enhanced with higher current intensities and lower bubble diameters. Additionally, the liquid velocity will decrease sharply when the bubble diameter smaller than the critical value (0.9 mm). It is better to keep the bubble diameter larger than the critical size for the electrolyte circulation.

show abstract

Application and optimisation studies of a zinc electrowinning process simulation

Cited by 23 publications

References 11 publications

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

Improving Current Efficiency Through Optimizing Electrolyte Flow in Zinc Electrowinning Cell

Experimental and numerical investigation of two‐phase flow patterns in magnesium electrolysis cell with non‐uniform current density distribution

Contact Info

Product

Resources

About