Apparatus for treating liquid metal in a vessel
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United States of America Patent
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-
Jan 10, 1984
Grant Date -
N/A
app pub date -
Oct 5, 1981
filing date -
Oct 5, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for treating molten metal in a bottom pour vessel through a pouring opening controlled by a slidable gate closure member. A dual concentric tuyere having a central conduit and an outer annular conduit is positioned in the pouring opening of the vessel. Treating material is injected into the molten metal through the central conduit of the tuyere and a coolant is passed through the outer annular conduit of the tuyere. After completion of the treatment, oxygen is blown through both the central conduit and the annular conduit to burn back the tuyere, opening the nozzle well for pouring.
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