Immersion nozzle
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United States of America Patent
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Oct 28, 2003
Grant Date -
Dec 19, 2002
app pub date -
May 13, 2002
filing date -
Apr 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention presents an immersion nozzle having corrosion resistance to steel of high oxygen content or type of steel treated with calcium, and capable of preventing adheres and deposits of molten steel and oxide inclusions on the nozzle inner wall, in which at least a part of its portion contacting with molten steel is composed of a refractory material containing 50 wt. % or more of a principal component including one or more types of magnesia, alumina, spinel, zirconia, mullite, and silica, and also 0.3 to 15 wt. % of boron nitride, and an organic binder.
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