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MONOLITHIC REFRACTORY FOR TUNDISH LINING
PROBLEM TO BE SOLVED: To suppress cracking and detachment during dissection and improve durability, in a monolithic refractory for tundish lining formed of alumina-magnesia quality.SOLUTION: The monolithic refractory for tundish lining comprises, in total 100 mass% of alumina raw material, magnesia raw material, silica superfine powder, and alumina cement: 70 mass% or more and 92 mass% or less of the alumina raw material; and 0.5 mass% or more and 12 mass% or less of the magnesia raw material. The magnesia raw material includes a fine powder magnesia raw material whose particle diameter is less than 75 μm, and a content ratio of the silica superfine powder/alumina cement in the total 100 mass% is 0.4 or more and 1.2 or less and the fine powder magnesia raw material is included by 0.5 mass% or more and 6.9 mass% or less in the total 100 mass%.
【課題】アルミナ−マグネシア質のタンディッシュ内張り用不定形耐火物において、解体時の亀裂剥離を抑制し、耐用性を向上させること。【解決手段】アルミナ原料、マグネシア原料、シリカ超微粉及びアルミナセメントの合量１００質量％中に前記アルミナ原料を７０質量％以上９２質量％以下、前記マグネシア原料を０．５質量％以上１２質量％以下含有し、前記マグネシア原料は粒径７５μｍ未満の微粉マグネシア原料を含み、前記合量１００質量％中における前記シリカ超微粉／前記アルミナセメントの含有量比が０．４以上１．２以下であり、かつ、前記合量１００質量％中に前記微粉マグネシア原料を０．５質量％以上６．９質量％以下含有するタンディッシュ内張り用不定形耐火物。【選択図】なし
MONOLITHIC REFRACTORY FOR TUNDISH LINING
PROBLEM TO BE SOLVED: To suppress cracking and detachment during dissection and improve durability, in a monolithic refractory for tundish lining formed of alumina-magnesia quality.SOLUTION: The monolithic refractory for tundish lining comprises, in total 100 mass% of alumina raw material, magnesia raw material, silica superfine powder, and alumina cement: 70 mass% or more and 92 mass% or less of the alumina raw material; and 0.5 mass% or more and 12 mass% or less of the magnesia raw material. The magnesia raw material includes a fine powder magnesia raw material whose particle diameter is less than 75 μm, and a content ratio of the silica superfine powder/alumina cement in the total 100 mass% is 0.4 or more and 1.2 or less and the fine powder magnesia raw material is included by 0.5 mass% or more and 6.9 mass% or less in the total 100 mass%.
【課題】アルミナ−マグネシア質のタンディッシュ内張り用不定形耐火物において、解体時の亀裂剥離を抑制し、耐用性を向上させること。【解決手段】アルミナ原料、マグネシア原料、シリカ超微粉及びアルミナセメントの合量１００質量％中に前記アルミナ原料を７０質量％以上９２質量％以下、前記マグネシア原料を０．５質量％以上１２質量％以下含有し、前記マグネシア原料は粒径７５μｍ未満の微粉マグネシア原料を含み、前記合量１００質量％中における前記シリカ超微粉／前記アルミナセメントの含有量比が０．４以上１．２以下であり、かつ、前記合量１００質量％中に前記微粉マグネシア原料を０．５質量％以上６．９質量％以下含有するタンディッシュ内張り用不定形耐火物。【選択図】なし
MONOLITHIC REFRACTORY FOR TUNDISH LINING
タンディッシュ内張り用不定形耐火物
UCHIYAMA HIROKI (author)
2015-09-24
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
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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