Process for protection of nozzles and refractory lining of a ves

Details Process for protection of nozzles and refractory lining of a ves Process for protection of nozzles and refractory lining of a ves

1981-11-30

1983-08-30

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, 266218, 266265, C21C 534, C21C 542

Patent

active

044014660

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.

REFERENCES:
patent: 3330645 (1967-07-01), DeMoustier
patent: 3663201 (1972-05-01), Heitmann
patent: 3844768 (1974-10-01), Leroy
patent: 3859078 (1975-01-01), Haysom
patent: 3898079 (1975-08-01), Eriksson
patent: 3990888 (1976-11-01), Eriksson
patent: 3999977 (1976-12-01), Kolb

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