High swelling ramming paste for aluminum electrolysis cell
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United States of America Patent
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Mar 6, 2007
Grant Date -
Sep 16, 2004
app pub date -
Mar 12, 2003
filing date -
Mar 12, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB.sub.2.
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