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To suppress cracking due to thermal shock at the initial stage of operation in a refractory material for iron making containing silicon carbide and titania.SOLUTION: A refractory for iron making according to the present invention contains in a refractory composition of 100 mass%: 5 mass% or more and 35 mass% or less of silicon carbide fine powder having a particle diameter of less than 0.3 mm; 3 mass% or more and 20 mass% or less of titania fine powder having a particle diameter of less than 0.3 mm; and 6 mass% or less of metallic silicon fine powder having the particle diameter of less than 75 μm, and it has a carbon black content of 5 mass% or less (including 0), wherein the content (Si) of the metallic silicon fine powder, the content (TiO2) of the titania fine powder, and the content (C) of the carbon black satisfy the following formula (1). Si/TiO2≥0.11*C+0.1...formula (1).SELECTED DRAWING: None
【課題】炭化珪素及びチタニアを含有する製銑用耐火物において稼働最初期の熱衝撃による割れを抑制する。【解決手段】 耐火組成物１００質量％中に、粒径０．３ｍｍ未満の炭化珪素微粉を５質量％以上３５質量％以下、粒径０．３ｍｍ未満のチタニア微粉を３質量％以上２０質量％以下、及び粒径７５μｍ未満の金属シリコン微粉を６質量％以下含有し、かつカーボンブラックの含有率が５質量％以下（０を含む）であり、更に、金属シリコン微粉の含有率（Ｓｉ）、チタニア微粉の含有率（ＴｉＯ２）、及びカーボンブラックの含有率（Ｃ）が次の式（１）を充足する製銑用耐火物。Ｓｉ／ＴｉＯ２≧０．１１×Ｃ＋０．１ … 式（１）【選択図】なし
To suppress cracking due to thermal shock at the initial stage of operation in a refractory material for iron making containing silicon carbide and titania.SOLUTION: A refractory for iron making according to the present invention contains in a refractory composition of 100 mass%: 5 mass% or more and 35 mass% or less of silicon carbide fine powder having a particle diameter of less than 0.3 mm; 3 mass% or more and 20 mass% or less of titania fine powder having a particle diameter of less than 0.3 mm; and 6 mass% or less of metallic silicon fine powder having the particle diameter of less than 75 μm, and it has a carbon black content of 5 mass% or less (including 0), wherein the content (Si) of the metallic silicon fine powder, the content (TiO2) of the titania fine powder, and the content (C) of the carbon black satisfy the following formula (1). Si/TiO2≥0.11*C+0.1...formula (1).SELECTED DRAWING: None
【課題】炭化珪素及びチタニアを含有する製銑用耐火物において稼働最初期の熱衝撃による割れを抑制する。【解決手段】 耐火組成物１００質量％中に、粒径０．３ｍｍ未満の炭化珪素微粉を５質量％以上３５質量％以下、粒径０．３ｍｍ未満のチタニア微粉を３質量％以上２０質量％以下、及び粒径７５μｍ未満の金属シリコン微粉を６質量％以下含有し、かつカーボンブラックの含有率が５質量％以下（０を含む）であり、更に、金属シリコン微粉の含有率（Ｓｉ）、チタニア微粉の含有率（ＴｉＯ２）、及びカーボンブラックの含有率（Ｃ）が次の式（１）を充足する製銑用耐火物。Ｓｉ／ＴｉＯ２≧０．１１×Ｃ＋０．１ … 式（１）【選択図】なし
REFRACTORY MATERIAL FOR IRON MAKING
製銑用耐火物
MAENO SHOHEI (author)
2024-10-07
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
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