A Non-Consumable Metal Anode for Production of Aluminum with Low-Temperature Fluoride Melts
A dimensionally-stable alloy anode is being developed to operate in the eutectic NaF-AlF3, bath at about 750°C as described in Light Metals 1994. A small range of composition of Cu-Ni-Fe alloy appears to have satisfactory low anodic oxidation rate and high oxide conductivity. The anodic oxidation rate is similar to air oxidation rate at the same temperature. Air oxidation studies carried out to 6 months appear to have satisfactory low rates. Operation with multiple, vertical, monopolar, metal anodes and TiB2 plate cathodes at 0.5 A/cm2 each side promises a 20-fold decrease in cell volume compared to conventional H-H cells, and a specific energy consumption of 11 kwh/kg.
KeywordsOxidation Rate Current Efficiency Light Metal Nickel Ferrite Specific Energy Consumption
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