Method for protecting tuyeres for refining a molten iron

Details Method for protecting tuyeres for refining a molten iron Method for protecting tuyeres for refining a molten iron

1983-07-06

1984-03-13

Rutledge, L. Dewayne

Metallurgical apparatus

Process

Tuyere operation

75 60, C21B 716

Patent

active

044362870

ABSTRACT:
Wear of tuyeres for refining a molten iron is prevented by blowing a CO-containing gas having the defined flow amount, oxygen gas flow amount and CO gas concentration as a shrouding gas which surrounds a core refining gas flow containing oxygen gas through tuyeres of concentric pipes. As the shrouding gas for cooling and protecting the tuyeres, use may be made of an exhaust gas discharged and recovered from a converter or a blast furnace by controlling the concentrations of CO and N.sub.2 in the exhaust gas to the specific limitations.

REFERENCES:
patent: 3201226 (1965-08-01), Spolders et al.
patent: 4330108 (1982-05-01), Nakanishi et al.

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