Slag stopping plug for tap holes of metal furnaces containing mo

Details Slag stopping plug for tap holes of metal furnaces containing mo Slag stopping plug for tap holes of metal furnaces containing mo

1989-10-13

1991-02-26

Kastler, S.

Metallurgical apparatus

Means sealing or opening aperture in vessel

By means plugging aperture

222597, C21C 548

Patent

active

049955942

ABSTRACT:
A plug for temporarily closing a tap hole in a metal making furnace comprises a plug body insertable into the tap hole. The plug body comprises a ceramic blanket. A plurality of biasing springs are disposed inside the blanket and are held in a retracted condition by a heat-sensitive retaining band which extends around an outer periphery of the plug. A plurality of metal strips are disposed on an outer surface of the plug to protect the blanket. When the plug is inserted into a tap hole, the band is melted by the high temperatures therein, enabling the spring to expand the plug into contact with a surface of the tap hole.

REFERENCES:
patent: 3124854 (1964-03-01), Dore
patent: 3398945 (1968-08-01), Walpole
patent: 3540627 (1970-11-01), Armstead
patent: 4030709 (1977-06-01), Shepard et al.
patent: 4471950 (1984-09-01), Labate
patent: 4826139 (1989-05-01), Van Es
patent: 4828226 (1989-05-01), Komanecky
patent: 4877221 (1989-10-01), Scriven
Article: Tri-Star--Comprehensive System for Total Tap Slag Carryover Control, 1 pg. (undated).

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