Metal working – Method of mechanical manufacture – Repairing
Patent
1988-04-08
1990-01-02
Rosenbaum, Mark
Metal working
Method of mechanical manufacture
Repairing
2940218, 295271, 29530, 206582, B22D 1910
Patent
active
048903752
ABSTRACT:
A plug 4 fitted in the side wall of a steel-making vessel is sealed in place by a crushed refractory material 8. This tends to burn off after a number of pourings of molten steel to create an enlarged approach well. This well can be repaired by inserting a steel pipe 10 having a tapered portion 12 leading to a narrow entry portion 11 so as to seal off the tap hole 5 in the plug 4. The well can then be filled with a refractory material 14 which sinters or fuses with heat to effect the repair. The steel pipe 10 will burn off during a subsequent heating and pouring of molten steel.
REFERENCES:
patent: 816558 (1906-04-01), Coffin
patent: 2131792 (1938-10-01), Coakley
patent: 3557435 (1971-01-01), Powell et al.
patent: 3944193 (1976-03-01), Imai et al.
patent: 4130924 (1978-12-01), Madill
patent: 4619374 (1986-10-01), Yavorsky
Chin Frances
Goricon Metallurgical Services Limited
Rosenbaum Mark
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