Dispensing – Processes of dispensing
Patent
1974-04-01
1976-03-16
Reeves, Robert B.
Dispensing
Processes of dispensing
222563, 266 38, 266 42, B22D 3700, B22D 4110
Patent
active
039441164
ABSTRACT:
The present invention discloses a process of closing a nozzle hole in the bottom of a tundish, which is used in pouring molten steel. The tundish has a bottom, which is generally funnel-shaped and, also, has wall means which define the nozzle hole. The steps of the process comprise placing a closure in the nozzle hole to close the same and then placing a finely divided chrome compound on top of the closure and into the nozzle hole and in an amount to at least partially fill the bottom of the tundish. The chrome compound has a sintering temperature of on the order of at least 1740.degree. C. The closure is provided by inserting a rolled up and pressed asbestos bead into the nozzle hole with an end of the bead extending out of the nozzle hole in a position to be grasped by a workman. The tundish of the present invention is operated by pouring molten steel into the tundish and on top of the finely divided chrome compound, which resides on top of the closure. When it is desired to remove the steel from the tundish the closure is removed from the nozzle hole by an operator grasping and pulling out the asbestos bead, which permits the finely divided chrome compound and the molten steel to flow from the nozzle hole.
REFERENCES:
patent: 1286632 (1918-12-01), Hodge
patent: 1797566 (1931-03-01), Brown
patent: 2328267 (1943-08-01), Freeman
patent: 3511261 (1970-05-01), Bick et al.
patent: 3525381 (1970-08-01), Leese et al.
Harbison-Welker Refractories Company, Modern Refractory Practice, Pittsburgh, Penn., 1961, pp. 282-284.
Reeves Robert B.
Scherbel David A.
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