Aluminium reduction cell
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United States of America Patent
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Apr 12, 1988
Grant Date -
N/A
app pub date -
Aug 13, 1986
filing date -
Aug 15, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an aluminium reduction cell including a cell lining and embedded therein at least one cathode current collector including a high temperature section comprising an electrically conducting refractory material such as titanium diboride, generally in conjunction with molten aluminium metal, corrosion is a problem. The invention provides a substance to protect the collector section. The substance may be a liquid impermeable layer e.g. particulate material impregnated with a molten fluoride-or chloride-containing salt mixture; for a getter such as particulate aluminium to react chemically with gaseous corrosive species. Combinations of these substances may be used, optionally in conjunction with a solid layer such as an alumina or aluminium metal tube.
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