Injection lance

Details Injection lance Injection lance

1987-03-16

1988-06-14

Rutledge, L. Dewayne

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

266270, C21C 546

Patent

active

047507160

ABSTRACT:
An injection lance is provided for introducing flux mixtures and the like into baths of molten metal, which lance has inner and outer spaced metal tubes with between them a tubular sheath of refractory material that is spaced from both the inner and outer tubes by air gaps. The outer tube may be of high temperature metal with a refractory coating. The tubes can be maintained in coaxial relationship by an end cap at the inlet end of the lance and by rammed ceramic fibre insulation introduced at both ends, the outer tube at the discharge end being chamfered and containing a body of rammed insulation in which the inner tube is buried, with the terminal portion of the flow passage through the lance at the discharge end being provided as a passage formed through the rammed insulation.

REFERENCES:
patent: 1793849 (1931-02-01), Groninger
patent: 4048352 (1977-09-01), Pignocco et al.

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