Self-opening closure for the discharge aperture of a crucible

Details Self-opening closure for the discharge aperture of a crucible Self-opening closure for the discharge aperture of a crucible

1974-06-12

1979-04-17

Andrews, M. J.

Metallurgical apparatus

Thermite reaction vessel

266271, 75 27, C21C 700

Patent

active

041497040

ABSTRACT:
A self-opening closure for the discharge aperture of a crucible containing an aluminothermic mixture for welding, the closure comprising a pellet of a solid, e.g. asbestos, having good mechanical resistance and which is not degassed by heating, a thermal conductivity below 2 kcal/m.h. .degree. C. and a fusion temperature below 1600.degree. C. The discharge aperture is formed in a detachable socket, one end of the discharge aperture having a part with a greater diameter to receive the pellet which forms the closure.

REFERENCES:
patent: 2024132 (1935-12-01), Sander
patent: 2253364 (1941-08-01), Cohen
patent: 3831915 (1974-08-01), Guntermann

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