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To provide a silicon nitride refractory for a blast furnace tuyere, which has improved spalling resistance and is excellent in flowability, and the texture of which can be elaborated.SOLUTION: The composition of a silicon nitride casting material is as follows: 70-95 mass% of silicon nitride, 2-15 mass% of zirconia, 1-5 mass% of silica ultra-fine powder, and 0.5-5 mass% of metal silicon. By this composition, the silicon nitride casting material can be obtained which is excellent in flowability and the texture of which can be elaborated; and when the casting material is molded into a refractory for a blast furnace tuyere, high spalling resistance can be obtained.SELECTED DRAWING: None
【課題】耐スポーリング性を向上させるとともに、流動性が良好で組織の緻密化が可能な炭化けい素質の高炉羽口用耐火物を提供する。【解決手段】炭化けい素質流し込み材の組成を炭化けい素７０〜９５質量％、ジルコニア２〜１５質量％、シリカ超微粉１〜５質量％、金属シリコン０．５〜５質量％の範囲とする。この組成によれば、流動性に優れ組織の緻密化が可能な炭化けい素質流し込み材を得ることができ、高炉羽口用耐火物に成形したとき高い耐スポーリング性を得ることができる。【選択図】なし
To provide a silicon nitride refractory for a blast furnace tuyere, which has improved spalling resistance and is excellent in flowability, and the texture of which can be elaborated.SOLUTION: The composition of a silicon nitride casting material is as follows: 70-95 mass% of silicon nitride, 2-15 mass% of zirconia, 1-5 mass% of silica ultra-fine powder, and 0.5-5 mass% of metal silicon. By this composition, the silicon nitride casting material can be obtained which is excellent in flowability and the texture of which can be elaborated; and when the casting material is molded into a refractory for a blast furnace tuyere, high spalling resistance can be obtained.SELECTED DRAWING: None
【課題】耐スポーリング性を向上させるとともに、流動性が良好で組織の緻密化が可能な炭化けい素質の高炉羽口用耐火物を提供する。【解決手段】炭化けい素質流し込み材の組成を炭化けい素７０〜９５質量％、ジルコニア２〜１５質量％、シリカ超微粉１〜５質量％、金属シリコン０．５〜５質量％の範囲とする。この組成によれば、流動性に優れ組織の緻密化が可能な炭化けい素質流し込み材を得ることができ、高炉羽口用耐火物に成形したとき高い耐スポーリング性を得ることができる。【選択図】なし
SILICON NITRIDE REFRACTORY
炭化けい素質耐火物
YAMAMOTO YUGA (author)
2020-08-20
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
B22D
CASTING OF METALS
,
Gießen von Metallen
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
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