Molten steel pouring nozzle
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United States of America Patent
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Feb 5, 1991
Grant Date -
N/A
app pub date -
Jan 2, 1990
filing date -
Feb 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A molten steel pouring nozzle having along the axis thereof a bore through which molten steel flows. At least part of an inner portion of the molten steel pouring nozzle, which inner portion forms said bore, is formed with a refractory consisting essentially of: zirconia clinker comprising cubic zirconia and calcium zirconate: from 40 to 85 wt. %, where, the content of calcium oxide in said zirconia clinker being within the range of from 3 to 35 weight parts relative to 100 weight parts of said zirconia clinker; graphite: from 10 to 30 wt. %; and at least one element selected from the group consisting of: silica: from 1 to 15 wt. %, and magnesia: from 1 to 15 wt. %.
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