A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
REFRACTORY BRICK
PROBLEM TO BE SOLVED: To provide an alumina-silica-silicon carbide-carbon-based refractory brick having excellent cracking resistance and erosion resistance and having low thermal conductivity.SOLUTION: This invention relates to a refractory brick, comprising 50-70 mass% of alumina raw material, 20-40 mass% of silica raw material and 2-10 mass% of flake graphite. An AlOcontent in the alumina raw material is 70 mass% or more; a SiOcontent of the silica raw material is 20 mass% or more; the silica raw material comprises pyrophyllite and/or mullite having a particle diameter of 2.8 mm or lower; and a mass ratio of the silica raw material between the particle diameter of more than 1 mm and 2.8 mm or lower and the particle diameter of 1 mm or lower is 2:0.5 to 2:5. Preferably, the alumina raw material has the particle diameter of 2.8 mm or lower, and the mass ratio thereof between the particle diameter of more than 1 mm and 2.8 mm or lower and the particle diameter of 1 mm or lower is 2:1 to 2:3; and the flake graphite has a particle size of 100 mesh or lower, and a mass ratio thereof between the particle size of more than 1,000 mesh and 100 mesh or lower and the particle size of 1,000 mesh or lower is 20:1 to 20:10.SELECTED DRAWING: None
【課題】耐割れ性と耐溶損性に優れ且つ熱伝導率の低いアルミナ・シリカ・炭化珪素・カーボン質の耐火物煉瓦を提供する。【解決手段】アルミナ原料を５０〜７０質量％、シリカ原料を２０〜４０質量％、鱗状黒鉛を２〜１０質量％含有し、アルミナ原料のＡｌ２Ｏ３含有量が７０質量％以上、シリカ原料のＳｉＯ２含有量が２０質量％以上であり、シリカ原料は、粒径２．８ｍｍ以下のろう石及び／又はムライトからなり、且つ粒径１ｍｍ超２．８ｍｍ以下と粒径１ｍｍ以下の質量比が２：０．５〜２：５である。好ましくは、アルミナ原料は、粒径２．８ｍｍ以下であり、且つ粒径１ｍｍ超２．８ｍｍ以下と粒径１ｍｍ以下の質量比が２：１〜２：３であり、鱗状黒鉛は、１００メッシュ以下の粒度を有し、且つ粒度が１０００メッシュ超１００メッシュ以下と粒度が１０００メッシュ以下の質量比が２０：１〜２０：１０である。【選択図】なし
REFRACTORY BRICK
PROBLEM TO BE SOLVED: To provide an alumina-silica-silicon carbide-carbon-based refractory brick having excellent cracking resistance and erosion resistance and having low thermal conductivity.SOLUTION: This invention relates to a refractory brick, comprising 50-70 mass% of alumina raw material, 20-40 mass% of silica raw material and 2-10 mass% of flake graphite. An AlOcontent in the alumina raw material is 70 mass% or more; a SiOcontent of the silica raw material is 20 mass% or more; the silica raw material comprises pyrophyllite and/or mullite having a particle diameter of 2.8 mm or lower; and a mass ratio of the silica raw material between the particle diameter of more than 1 mm and 2.8 mm or lower and the particle diameter of 1 mm or lower is 2:0.5 to 2:5. Preferably, the alumina raw material has the particle diameter of 2.8 mm or lower, and the mass ratio thereof between the particle diameter of more than 1 mm and 2.8 mm or lower and the particle diameter of 1 mm or lower is 2:1 to 2:3; and the flake graphite has a particle size of 100 mesh or lower, and a mass ratio thereof between the particle size of more than 1,000 mesh and 100 mesh or lower and the particle size of 1,000 mesh or lower is 20:1 to 20:10.SELECTED DRAWING: None
【課題】耐割れ性と耐溶損性に優れ且つ熱伝導率の低いアルミナ・シリカ・炭化珪素・カーボン質の耐火物煉瓦を提供する。【解決手段】アルミナ原料を５０〜７０質量％、シリカ原料を２０〜４０質量％、鱗状黒鉛を２〜１０質量％含有し、アルミナ原料のＡｌ２Ｏ３含有量が７０質量％以上、シリカ原料のＳｉＯ２含有量が２０質量％以上であり、シリカ原料は、粒径２．８ｍｍ以下のろう石及び／又はムライトからなり、且つ粒径１ｍｍ超２．８ｍｍ以下と粒径１ｍｍ以下の質量比が２：０．５〜２：５である。好ましくは、アルミナ原料は、粒径２．８ｍｍ以下であり、且つ粒径１ｍｍ超２．８ｍｍ以下と粒径１ｍｍ以下の質量比が２：１〜２：３であり、鱗状黒鉛は、１００メッシュ以下の粒度を有し、且つ粒度が１０００メッシュ超１００メッシュ以下と粒度が１０００メッシュ以下の質量比が２０：１〜２０：１０である。【選択図】なし
REFRACTORY BRICK
耐火物煉瓦
YOSHIDA KEISUKE (author) / MATSUNAGA HISAHIRO (author) / TOMITANI NAOSHI (author) / IIDA ATSUHISA (author) / TORIGOE ATSUSHI (author)
2018-08-16
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
,
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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