Compositions: ceramic – Ceramic compositions – Refractory
Patent
1986-12-22
1988-10-25
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501100, 501101, 501104, 501105, 501109, 501112, 501117, 501119, C04B 3504, C04B 3510, C04B 3544, C04B 3552
Patent
active
047804343
ABSTRACT:
A refractory composition which is suitable for forming a sliding gate to be used at the bottom of a ladle or tundish is provided. The refractory composition comprises 10 to 30 parts by weight of an alumina-magnesia spinel material containing 40 to 70% by weight of Al.sub.2 O.sub.3, 25 to 60% by weight of MgO and 10% or less of impurities, and 70 to 90 parts by weight of a magnesia material containing at least 90% by weight of MgO, wherein the composition contains 10 to 25% by weight of Al.sub.2 O.sub.3 and 75 to 90% by weight of MgO. 1 to 10 parts by weight of Al.sub.2 O.sub.3 material may be further added together with the alumina-magnesia spinel material and the magnesia material, to form the refractory composition.
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Doro Satoshi
Fukaya Takahiro
Kato Yoshihisa
Kawai Kazuhide
Nishibe Takafumi
Bell Mark L.
Toshiba Ceramics Co. Ltd.
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