Lance for stirring molten metal and method of making the same

Details Lance for stirring molten metal and method of making the same Lance for stirring molten metal and method of making the same

1985-08-23

1987-05-26

Rutledge, L. Dewayne

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29423, 29424, 29458, 249 62, 264 59, 264317, 266225, 501124, C21C 548

Patent

active

046673857

ABSTRACT:
For a molten metal stirring lance a steel tubular member is coated interiorly with wax, for instance, and a refractory material plug is cast in the member. The plug extends from one end of the member and leaves a clear space near the other end. Melting the wax out leaves a thin gas passageway gap around the plug. The end having the clear space is capped and connected to a gas feed pipe which is surrounded by a stiffener member. The latter member is convered with a refractory material protective sheath. The refractory material in the tubular member erodes or ablates by a small amount during each use in molten metal to keep the gas discharge gap clear.

REFERENCES:
patent: 2535100 (1950-12-01), Sourwine
patent: 2890514 (1959-06-01), Doran et al.
patent: 3061887 (1962-12-01), Clarke
patent: 3718489 (1973-02-01), Crookston et al.
patent: 4367868 (1983-01-01), Blom et al.
patent: 4396179 (1983-08-01), LaBate
patent: 4449701 (1984-05-01), Pitzer et al.

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