Metallurgical injection lance

Details Metallurgical injection lance Metallurgical injection lance

1988-02-02

1988-10-25

Rutledge, L. Dewayne

Metallurgical apparatus

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

By means introducing treating material

266270, C21C 548

Patent

active

047798475

ABSTRACT:
A metallurgical lance for injecting a material into molten metal is provided. The lance has a outer conduit with first and second ends, and a material carrier inner conduit for carrying the material to be injected into the molten metal. The inner conduit has a supply end and an injection end and is in part disposed within and throughout the outer conduit. A high temperature heat insulator is disposed around the outer conduit and extends along the outer conduit from at least an intermediate portion thereof to at least the first end thereof whereby all portions of the lance to be disposed in the molten metal are protected by the insulator. A first end closure and a second end closure for the outer conduit have centrally located apertures therein for receiving a portion of the inner conduit. A centering member is disposed in juxtaposition to the first end closure and has an internal configuration in the form of a frustum such that the base of the frustum has dimensions substantially the same as the inside dimensions of the outer conduit and the top of the frustum has dimensions substantially the same as the dimensions of the aperture in the first end closure. Thus, the inner conduit may be disposed within the outer conduit by sliding the inner conduit from the second end of the outer conduit through the outer conduit and to the centering member, where when in contact with the frustum configuration of the centering member, the injection end of the inner conduit is slidable to and centerable with the aperture in the first end closure and thus receivable and passable thereby.

REFERENCES:
patent: 3495815 (1970-02-01), Holmes
patent: 3615085 (1971-10-01), Bernsmann
patent: 4366952 (1983-01-01), Sorger

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