Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Patent
1983-02-10
1984-02-21
Rutledge, L. Dewayne
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
266266, 75 60, 239124, 2391323, 239565, C21C 532
Patent
active
044325347
ABSTRACT:
A gas-injection lance has a main tube centered on an axis and having a lower end formed adjacent the axis with a plurality of throughgoing inner orifices and an upper end to which is fed a treatment gas under pressure that pressurizes the interior of the tube therewith sufficiently that the gas exits from the lower end through the inner orifices at supersonic speed. An annular array of nozzles traversing the lower tube end around the inner orifices each have an outer end opening outside of the tube and an inner end inside the tube. Respective pressure-reducers each have one side open at the lower tube end inside the tube and another side connected to the inner end of a respective nozzle for passing gas from the interior of the tube into the nozzles with a substantial pressure reduction so that the gas exits from the outer ends of the nozzles at subsonic speed. The pressure-reducers each comprise a body forming a chamber of predetermined flow cross section into which the respective inner nozzle end opens and an inlet on the body having an opening of flow cross section much smaller than that of the chamber and of the respective nozzle.
REFERENCES:
patent: 3141763 (1964-07-01), Foresi et al.
patent: 3338570 (1967-08-01), Zimmer
patent: 3411716 (1968-11-01), Stephan et al.
Richard Daniel
Zanetta Hugues
Institut de Recherches de la Siderurgie Francaise
McDowell Robert
Rutledge L. Dewayne
Striker Michael J.
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