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SHRINKABLE REFRACTORY, PRODUCTION METHOD THEREOF, AND REFRACTORY LINING STRUCTURE OF BLAST FURNACE TUYERE PART
To provide a shrinkable refractory having strength that can withstand the load of an upper refractory without being deformed even without using a support material at room temperature, and compressible against the load newly applied by thermal expansion (thermal stress load) in a high-temperature state in operation, and to provide a refractory lining structure of a blast furnace tuyere part.SOLUTION: A compressible refractory contains a refractory material comprising a total of 30-70 mass% of inorganic particles, at least partially containing silicon carbide particles, and a total of 30-70 mass% of alumina-based or silica-based inorganic fibers, and a pasting agent. The compressible refractory is a plate-like molded article having a laminated structure in which inorganic particles 12 are embedded in a void of a mesh-like framework intertwined with inorganic fibers 13, and comprises 30 mass% or more and 65 mass% or less of Al2O3 component, 25 mass% or more and 50 mass% or less of SiC component, and has a room-temperature compressive strength of 0.5 MPa or more.SELECTED DRAWING: Figure 5
【課題】室温施工時に受け支持材を用いずとも上部の耐火物の荷重に対し変形せず耐えうる強度を有しながら、稼働時の高温状態では熱膨張により新たに加わる荷重（熱応力負荷）に対し可縮性を有する可縮性耐火物、及び高炉羽口部の耐火物ライニング構造を提供する。【解決手段】少なくとも一部に炭化珪素粒子を含む無機粒子を合計で３０～７０質量％及びアルミナ系又はシリカ系の無機繊維を合計で３０～７０質量％含有する耐火性材料と、糊剤とを含む可縮性耐火物である。この可縮性耐火物は、無機繊維１３が絡み合う網目状骨格の空隙に無機粒子１２が内在する積層化された組織を有する板状の成形体であり、Ａｌ２Ｏ３成分を３０質量％以上６５質量％以下、ＳｉＣ成分を２５質量％以上５０質量％以下含有し、室温圧縮強度は０．５ＭＰａ以上である。【選択図】図５
SHRINKABLE REFRACTORY, PRODUCTION METHOD THEREOF, AND REFRACTORY LINING STRUCTURE OF BLAST FURNACE TUYERE PART
To provide a shrinkable refractory having strength that can withstand the load of an upper refractory without being deformed even without using a support material at room temperature, and compressible against the load newly applied by thermal expansion (thermal stress load) in a high-temperature state in operation, and to provide a refractory lining structure of a blast furnace tuyere part.SOLUTION: A compressible refractory contains a refractory material comprising a total of 30-70 mass% of inorganic particles, at least partially containing silicon carbide particles, and a total of 30-70 mass% of alumina-based or silica-based inorganic fibers, and a pasting agent. The compressible refractory is a plate-like molded article having a laminated structure in which inorganic particles 12 are embedded in a void of a mesh-like framework intertwined with inorganic fibers 13, and comprises 30 mass% or more and 65 mass% or less of Al2O3 component, 25 mass% or more and 50 mass% or less of SiC component, and has a room-temperature compressive strength of 0.5 MPa or more.SELECTED DRAWING: Figure 5
【課題】室温施工時に受け支持材を用いずとも上部の耐火物の荷重に対し変形せず耐えうる強度を有しながら、稼働時の高温状態では熱膨張により新たに加わる荷重（熱応力負荷）に対し可縮性を有する可縮性耐火物、及び高炉羽口部の耐火物ライニング構造を提供する。【解決手段】少なくとも一部に炭化珪素粒子を含む無機粒子を合計で３０～７０質量％及びアルミナ系又はシリカ系の無機繊維を合計で３０～７０質量％含有する耐火性材料と、糊剤とを含む可縮性耐火物である。この可縮性耐火物は、無機繊維１３が絡み合う網目状骨格の空隙に無機粒子１２が内在する積層化された組織を有する板状の成形体であり、Ａｌ２Ｏ３成分を３０質量％以上６５質量％以下、ＳｉＣ成分を２５質量％以上５０質量％以下含有し、室温圧縮強度は０．５ＭＰａ以上である。【選択図】図５
SHRINKABLE REFRACTORY, PRODUCTION METHOD THEREOF, AND REFRACTORY LINING STRUCTURE OF BLAST FURNACE TUYERE PART
可縮性耐火物及びその製造方法並びに高炉羽口部の耐火物ライニング構造
SASAKI TOSHIHISA (author) / ITAKUSU MOTOKUNI (author) / FURUYA RIKU (author) / MAEDA TSUYOSHI (author)
2024-01-19
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
C21B
Gewinnung von Eisen oder Stahl
,
MANUFACTURE OF IRON OR STEEL
/
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
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
CEMENT MORTAR OF REFRACTORY BRICK FOR BLAST FURNACE TUYERE AND BLAST FURNACE TUYERE STRUCTURE
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Concrete for refractory lining of a blast-furnace shaft
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Composite refractory for an inner lining of a blast furnace
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