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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry V
Presentation Title Optimisation of the Anodic and Cathodic Current Densities during Nd Electrowinning Process
Author(s) Mathieu Gibilaro, Christophe Remazeilles, Laurent Massot, Pierre Chamelot
On-Site Speaker (Planned) Mathieu Gibilaro
Abstract Scope Nd metal is industrially produced in LiF-NdF3-Nd2O3 by electrolysis at around 1000 °C using a carbon anode, according to the reaction: Nd2O3 + 3/2 C→2 Nd + 3/2 CO2 On the anodic part, in case of Nd2O3 depletion, the production of carbon oxide CO and perfluorocarbons CFx was observed. The point is that CO production leads to the anode over-consumption meanwhile CFx are powerful greenhouse effect gases. The influences of Nd2O3 content in LiF-NdF3-Nd2O3 on the anode oxidation was investigated by coupling IR-spectroscopy and electrochemical techniques, to prevent CFX formation during Nd electrolysis. It was observed that carbon anode was only oxidized into CO2(g) until the limiting current density was reached. Beyond this value, CFx were also produced. On the cathodic part, the influence of the current density was investigated as a function of the production yield. A minimum current density is required to obtain a good metallic Nd coalescence.
Proceedings Inclusion? Planned:
Keywords Pyrometallurgy, Electrometallurgy,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Revised High Temperature Synthesis of UCl3 via Reaction of U with FeCl2
Blind Identification and Quantification of Analytes in Molten LiCl-KCl Eutectic
Chloro-aluminate Species Distribution Correlation with Electrical Conductivity of 1-ethyl-3-methyl Imidazolium Chloride (EMIC)-Aluminum Chloride (AlCl3) System
Cyclic Voltammetry for Real-time Oxide Ion Concentration Measurements of a Molten CaCl2
Electrochemical Behavior of Bismuth in molten LiCl-KCl-CaCl2
Electrochemical Properties of Ca-Sb Metal Battery with a Molten Chloride Electrolyte
Electrochemical Reduction of Nd2O3+Fe2O3 Mixed Oxide Precursors in Calcium Chloride Melt
Evaluating the Effects of Mixed Cation Molten Salt Electrolytes within the Li-Sb-Sn Liquid Metal Battery System
Evaluating the Electrochemical Recovery of Gd Using a Reactive Liquid Bi Electrode
Formation of Carbon Layer on Ni and Mo Through Electrochemical Reduction of Carbonate Ions in Molten LiCl
Numerical Modelling and Phase Field Modelling of Silicon Electrodeposition for Solar Cells at High Temperatures using Molten Salts
On the Separation of Niobium and Tantalum Metals via Molten Sulfide Electrolysis
Optimisation of the Anodic and Cathodic Current Densities during Nd Electrowinning Process
Oxide Ion Ceramic Sensor in Molten CaCl2 for Real Time Monitoring of the Direct Oxide Reduction Process
Relative Performance of Platinum, Iridium, and Ruthenium as Oxygen-Evolving Anodes during the Electrolytic Reduction of Uranium Oxide in Molten LiCl-Li2O
Study of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt
The Demonstration and Optimization of Thin-cell Electrochemical Measurements in Molten LiCl-KCl Eutectic
The Impact of Moisture on the Electrochemical Behavior of Molten Calcium Chloride
Thermodynamic Properties of Nd-Fe Alloys via EMF Measurements in Molten Salts

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