Metallurgical apparatus – Means for introducing fluent into vessel – e.g. – tuyere – With flow control means or internal flow guide
Patent
1988-06-03
1989-08-08
McDowell, Robert
Metallurgical apparatus
Means for introducing fluent into vessel, e.g., tuyere
With flow control means or internal flow guide
2642791, 266225, 266270, 266220, C21C 532
Patent
active
048545538
ABSTRACT:
Apparatus for introducing stirring and refining agents into molten metal in a vessel using a lance having an elongated refractory body with a bore extending inwardly of a first or upper end of the refractory body and terminating inwardly of a second or delivery end thereof. A plurality of small tubes are positioned within the refractory body and communicate with the bore and the exterior of the refractory body whereby gas introduces into the bore flows through the small tubes to the delivery end and sides of the lance and bubbles upwardly shielding the lance from the rapid erosion that occurs when molten slag and steel attack the material of the lance due to the chemistry and temperature of the molten metal.
REFERENCES:
patent: 3082997 (1963-03-01), Kurzinski
patent: 3379428 (1968-04-01), Dortenzo et al.
patent: 3645520 (1972-02-01), Acre et al.
patent: 3898078 (1975-08-01), Huber
patent: 4326701 (1982-04-01), Hayden, Jr. et al.
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