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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Electrometallurgy 2020
Presentation Title Effective Copper Diffusion Coefficients in CuSO4 – H2SO4 Electrowinning Electrolytes
Author(s) Joseph Bauer, Michael Moats
On-Site Speaker (Planned) Joseph Bauer
Abstract Scope Mass transport is an important factor in the deposit quality of copper electrowinning. Presently, there is limited diffusivity data available at commercially relevant concentrations between 25 and 40 °C. Linear sweep voltammetry at a rotating disk electrode was used to measure effective diffusion coefficients of cupric ion for a wide range of copper concentrations (10-50 g/L), sulfuric acid concentrations (120-240 g/L), and temperatures (25-60 °C). The results were well correlated by the equation: D, m2/s = 2.977×10-10 - 5.462×10-13 [Cu] - 1.212×10-12 [H2SO4] + 1.688×10-11×T, where [Cu] and [H2SO4] are in g/L, and T is °C. Addition of 20 mg/L Cl- slightly increased diffusivity. Other common commercial organic smoothing agents were found to have no effect. The measured diffusivities were used to calculate the maximum permissible current density that can produce smooth dense cathodes as a function of copper concentration and temperature.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A 3-D Numerical Model to Predict Low Temperature Aluminum Electrochemical Process Using Ionic Liquids as Electrolytes at Different Boundary Conditions
A Key Role for Electrometallurgy in Climate Change Mitigation
Capital Cost Estimation for Electrochemical Processes
Development of a Magnesium Metal Production Process Using North Korean Magnesite
Development of a Novel Magnesium Metal Production Process by Electrolysis of Magnesium Oxide Using a Tin Metal Cathode
Effective Copper Diffusion Coefficients in CuSO4 – H2SO4 Electrowinning Electrolytes
Electrolytic Extraction of Liquid Copper and Iron from Chalcopyrite Ore
Enhanced Aluminum Electrorefining Process from Aluminum Alloy Scraps via Surface Engineering
Future Prospects for Copper Leaching, Solvent Extraction and Electrowinning Technology
M-56 (Digital): Electron Beam Refinery and Purification in Newly Constructed Production Units with Gas Discharged Electron Beam Guns
M-58: Electrochemical Behavior of Fe2O3 in Electro-deoxygenation in NaCl-CaCl2 Molten Salt System
M-59: Reduction Mechanism of Metal Cobalt from Cathode Material of Waste Lithium Cobalt Oxide Battery
Modeling Nickel and Zinc Electrowinning Based on Ion Mass Transport and Electrode Reaction Kinetics
Study on High-temperature Liquid Lithium Battery with LiI-KI Electrolyte
The Electrochemical Conversion of Chalcopyrite to Less Refractory Mineral Phases for Hydrometallurgical Processing
Theories of Electrodeposition, Beings-of-reason, and Reality

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