Process for protection of nozzles and refractory lining of a vessel for refining molten metal
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United States of America Patent
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-
Aug 30, 1983
Grant Date -
N/A
app pub date -
Nov 30, 1981
filing date -
Nov 30, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for protecting oxygen injection nozzles and the surrounding refractory lining of a molten metal refining vessel having such oxygen injection nozzles beneath the bath surface. The injection nozzle comprises at least three concentric pipes, the central conduit thereof being connected to a source of oxygen, the outer annular conduits thereof each being supplied with a protective fluid, said protective fluid containing at least one hydroxyl compound or water or a mixture thereof. The protective hydroxyl compounds are selected from the gaseous or liquid alcohol group and preferably from the aliphatic alcohol group. Methanol, ethanol, propanol and butanol are preferred alcohols. Apparatus for carrying out the process is also disclosed.
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