Lance for removing skulls from steelmaking vessels
AssigneePullman Berry Company
InventorsNicholas M. Rymarchyk, Leo L. Meinert
Life of this patent
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Abstract
Skulls which form within the upper nose section of steelmaking vessels are removed by means of a centrally located top blowing lance designed to blow at high velocity oxygen or other gases. The lance includes laterally extending ports communicating with a central relatively wide gas chamber and the gas is directed generally laterally outwardly against the inner wall of the nose section to retard or remove the skulls.
Claims9
For use with a metal refining vessel having a hearth portion adapted to contain a molten metal charge and a nose section thereabove containing an opening through which the vessel is charged, the improvement of a lance extending through said opening for injecting an oxidizing gas from said lance against an inner wall of said nose section to prevent and remove nose skull build up comprising:
- an outer pipe assembly,
- an inner pipe assembly, and
- an intermediate pipe assembly,
- said assemblies being interconnected to provide a central gas conduit, and water inlet and outlet passages,
- a nozzle including a bottom and associated side wall extending generally upwardly therefrom, said nozzle being connected to said pipe assemblies including a central gas chamber communicating with said gas conduit,
- a by-pass chamber in said nozzle communicating with said water outlet and inlet passages, and
- a plurality of circumferentially spaced gas ports in said nozzle communicating with said central gas chamber and positioned extending outwardly through the side wall of said nozzle to direct a gas substantially outwardly against said inner wall of said nose section, the bottom wall of said nozzle being imperforate so that gas in said central gas chamber flows outwardly only through said circumferentially spaced gas ports.
Dependencies are inferred from the claim text.