Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
ALUMINA-MAGNESIA CASTABLE REFRACTORY AND METHOD FOR PRODUCING THE SAME
To provide an alumina-magnesia castable refractory with excellent durability which suppresses the disappearance of the liquid phase formed inside the refractory during use and does not cause buckling.SOLUTION: An alumina-magnesia castable refractory of this invention comprises: 0.8 to 1.2% by mass of a silica powder having a maximum particle size of 1 μm or less; 4.0 to 7.0% by mass of a magnesia refractory material having a maximum particle size of less than 1 mm; 3.0 to 8.0% by mass of an alumina cement; and an alumina-based refractory material having a maximum particle size of less than 30 mm as the balance, based on 100 mass% of the refractory including the silica powder, the magnesia refractory material, the alumina cement, and the alumina refractory material, in which the alumina-based refractory raw material contains 5.0 to 15.0% by mass of particles having a particle size of 10 μm or more and 75 μm or less, based on 100% by mass of the refractory, and a granulated lump having a particle size of 0.3 mm or more and less than 1.0 mm, which is formed by the total amount of the alumina refractory raw material having a particle size of 10 μm or more and 75 μm or less and the total amount of the silica powder.SELECTED DRAWING: Figure 3
【課題】使用中の耐火物内部で生成する液相の消失が抑制され、座屈が発生しない耐用性に優れたアルミナ−マグネシア質キャスタブル耐火物を提供する。【解決手段】シリカ粉体、マグネシア質耐火原料、アルミナセメント、及びアルミナ質耐火原料を含む耐火物１００質量％として、０．８〜１．２質量％の、１μｍ以下の最大粒径を有する前記シリカ粉体、４．０〜７．０質量％の、１ｍｍ未満の最大粒径を有する前記マグネシア質耐火原料、３．０〜８．０質量％の前記アルミナセメント、及び残部として３０ｍｍ未満の最大粒径を有する前記アルミナ質耐火原料を含み、前記アルミナ質耐火原料は、前記耐火物１００質量％を基準として、粒度が１０μｍ以上７５μｍ以下の粒子を５．０〜１５．０質量％含み、前記粒度が１０μｍ以上７５μｍ以下のアルミナ質耐火原料の全量と前記シリカ粉体の全量とで形成された、粒度が０．３ｍｍ以上１．０ｍｍ未満の造粒塊を含む、ことを特徴とするアルミナ−マグネシア質キャスタブル耐火物。【選択図】図３
ALUMINA-MAGNESIA CASTABLE REFRACTORY AND METHOD FOR PRODUCING THE SAME
To provide an alumina-magnesia castable refractory with excellent durability which suppresses the disappearance of the liquid phase formed inside the refractory during use and does not cause buckling.SOLUTION: An alumina-magnesia castable refractory of this invention comprises: 0.8 to 1.2% by mass of a silica powder having a maximum particle size of 1 μm or less; 4.0 to 7.0% by mass of a magnesia refractory material having a maximum particle size of less than 1 mm; 3.0 to 8.0% by mass of an alumina cement; and an alumina-based refractory material having a maximum particle size of less than 30 mm as the balance, based on 100 mass% of the refractory including the silica powder, the magnesia refractory material, the alumina cement, and the alumina refractory material, in which the alumina-based refractory raw material contains 5.0 to 15.0% by mass of particles having a particle size of 10 μm or more and 75 μm or less, based on 100% by mass of the refractory, and a granulated lump having a particle size of 0.3 mm or more and less than 1.0 mm, which is formed by the total amount of the alumina refractory raw material having a particle size of 10 μm or more and 75 μm or less and the total amount of the silica powder.SELECTED DRAWING: Figure 3
【課題】使用中の耐火物内部で生成する液相の消失が抑制され、座屈が発生しない耐用性に優れたアルミナ−マグネシア質キャスタブル耐火物を提供する。【解決手段】シリカ粉体、マグネシア質耐火原料、アルミナセメント、及びアルミナ質耐火原料を含む耐火物１００質量％として、０．８〜１．２質量％の、１μｍ以下の最大粒径を有する前記シリカ粉体、４．０〜７．０質量％の、１ｍｍ未満の最大粒径を有する前記マグネシア質耐火原料、３．０〜８．０質量％の前記アルミナセメント、及び残部として３０ｍｍ未満の最大粒径を有する前記アルミナ質耐火原料を含み、前記アルミナ質耐火原料は、前記耐火物１００質量％を基準として、粒度が１０μｍ以上７５μｍ以下の粒子を５．０〜１５．０質量％含み、前記粒度が１０μｍ以上７５μｍ以下のアルミナ質耐火原料の全量と前記シリカ粉体の全量とで形成された、粒度が０．３ｍｍ以上１．０ｍｍ未満の造粒塊を含む、ことを特徴とするアルミナ−マグネシア質キャスタブル耐火物。【選択図】図３
ALUMINA-MAGNESIA CASTABLE REFRACTORY AND METHOD FOR PRODUCING THE SAME
アルミナ−マグネシア質キャスタブル耐火物、及びその製造方法
MATSUI TSUYOSHI (Autor:in)
25.07.2019
Patent
Elektronische Ressource
Japanisch
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
DURABILITY EVALUATION METHOD FOR ALUMINA-MAGNESIA CASTABLE REFRACTORY
| Europäisches Patentamt | 2019
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
| Europäisches Patentamt | 2020