Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Patent
1978-12-18
1981-01-13
Rutledge, L. Dewayne
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
266225, 406109, 75 53, C21C 700
Patent
active
042445620
ABSTRACT:
A lance is removably mounted in a powder container for injecting powder into molten metal within a furnace. The unitary connection of the lance and powder container enables vertical transport of powder as the unit is raisable and lowerable with respect to an opening in the furnace. The powder container can be filled by evacuating it and sucking powder therein. An ejector tube including a cut-off valve maintains the lance opening free from melt when the lance is immersed in the molten metal with no powder injection taking place. A hydraulic cylinder may be used to operate the ejector tube and the cut-off valve. The application of weights enables the container to maintain contact with the furnace roof.
REFERENCES:
patent: 2858125 (1958-10-01), Clenny et al.
patent: 3069205 (1962-12-01), McIver et al.
patent: 3801084 (1974-04-01), Leroy et al.
patent: 4010938 (1977-03-01), Crudup
patent: 4150769 (1979-04-01), James
Perry, J. H., ed.; Chemical Engineers' Handbook, 4th Edition; McGraw-Hill Book Co., N.Y., pp. 6-29 (1963).
ASEA Aktiebolag
Lewis Michael L.
Rutledge L. Dewayne
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