Results 191 to 200 of about 2,599 (228)
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Experimental determination of the factors affecting zinc electrowinning efficiency
Journal of Applied Electrochemistry, 1988A series of experiments were conducted to investigate the factors affecting the efficiency of zinc electrowinning. The experiments were conducted in 10-1 cells using a high purity industrial zinc sulphate solution. The lowest specific energy consumption achieved in the cells was 2637 kWh t−1 Zn under the following conditions: $$\begin{gathered} 70 ...
A. C. Scott +3 more
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Electrowinning of Zinc and Lead from Alkaline Solutions
2017Electrowinning of zinc and lead from alkaline solutions depends on zinc or lead concentrations, temperature, current density, NaOH concentration, electrode distance and electrode material on current efficiency, and energy consumption of zinc or lead electrowinning. The optimum conditions for zinc electrowinning are zinc concentration 30–40 g/L, current
Zhao Youcai, Zhang Chenglong
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A validated mathematical model for a zinc electrowinning cell
Journal of Applied Electrochemistry, 1992A set of (95) equations forming a dynamic, nonlinear model of an industrial pilot-plant scale zinc electrowinning cell fed with high purity electrolyte is presented. Only the solution of the steady-state model is considered in this paper. Values for unknown model parameters have either been obtained from the literature or else estimated using ...
G. W. Barton, A. C. Scott
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Current Distribution at the Electrodes in Zinc Electrowinning Cells
Journal of The Electrochemical Society, 1995The current distribution in zinc electrowinning cells was determined experimentally by weighing the deposited zinc and it was calculated using a mathematical model. The Laplace equation was solved for a two‐dimensional cross section of the interelectrode space with boundary conditions corresponding to secondary current distribution.
K. Bouzek +5 more
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Influence of nickel on cathode process of zinc electrowinning
Hydrometallurgy, 2012Abstract The influence of Ni 2 + on the cathode polarization process and the kinetics equation and its parameters in zinc electrowinning has been investigated in this paper. When [Ni 2 + ] − 1 , the limiting current density increases with increasing Ni 2 + concentration up to a maximum where [Ni 2 + ] = 4 mg L − 1 .
Zhidong Liu +5 more
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Study on Behavior of Impurity Antimony in Zinc Electrowinning
Advanced Materials Research, 2011By means of an electrochemical study, the influence of Sb3+ on cathode polarization process in zinc electrowinning and its kinetics equation and parameters have been studied. The results show that antimony has a depolarization function in the presence of [Sb3+] ≥0.5 mg·L–1 in zinc electrowinning, and Sb3+ has a polarization function in zinc ...
Xiao Hua Yu +5 more
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Electrochemical study of Pb anodes for zinc electrowinning industry
Surface Engineering, 2014The corrosion resistance and electrochemical behaviour of recovery (recovery anodes are made of remelted alloys) Pb, Pb–0·4Ag (wt-%) and Pb–0·1Ag–0·07Ca (wt-%), anode alloys in acidic zinc sulphate electrolyte were investigated. Their electrocatalytic activity towards oxygen evolution reaction (OER) and corrosion resistance were evaluated using ...
Sh. Nakisa +2 more
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The electrowinning of cadmium in the presence of zinc
Hydrometallurgy, 2010Abstract The electrowinning of cadmium in the presence of zinc has been investigated. As such, the effects of initial cadmium concentration (40–160 g/L), current density (50–150 A/m2), free acid concentration (0–196 g/L), initial zinc concentration (20–120 g/L), and temperature (25–70 °C) on current efficiency (CE) and specific power consumption (SPC)
Mohammad Sadegh Safarzadeh +1 more
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Identifying research opportunities in zinc electrowinning
JOM, 1997J. A. González-Domínguez +1 more
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Effect of impurity presence in zinc chloride electrowinning
2003Zinc chloride electrowinning presents difficulties in obtaining smooth, compact and dendrite free deposits with a high current efficiency due to the presence of undesirable metal ions. However, it is hard to define a level of impurities tolerable in zinc deposition, and despite a lot of research in this field, the reaction mechanisms of the undesired ...
LUPI, Carla +2 more
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