Submerged nozzle for continuous thin-slab casting
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United States of America Patent
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Issued Date -
Oct 30, 2003
app pub date -
Apr 25, 2003
filing date -
Apr 26, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A submerged nozzle for continuous thin-slab casting by which a high quality thin-slab strand may be stably supplied for a long time in a continuous manner is provided, as a drift current and surface fluctuation of molten steel in the nozzle and a mold are prevented, and adhesion of ground metal to the nozzle, the damages of the nozzle and the like are suppressed even under long time use. In the submerged nozzle for continuous thin-slab casting, which comprises: a molten steel entrance port at the upper end; a molten steel stream channel with a shape of a tube extending downward from the molten steel entrance port; and a molten steel discharge opening at the lower end and in which the molten steel stream channel includes an upper section with a shape of a circular cylinder, an intermediate section with a transforming shape from a shape of a circular cylinder to a shape of a flat cylinder, and a lower section with a shape of a flat and straight tube, a cross sectional area at the flat and straight tube section in the lower section is configured to be equal to or larger than 95% or equal to or less than 105% of a cross sectional area at the cylindrical section in the upper section of the molten steel stream channel.
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