A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MAGNESIA ALUMINA CARBON BRICK
To provide a magnesia alumina carbon brick capable of suppressing the decrease in corrosion resistance due to the use of alumina to impart residual expansibility.SOLUTION: A magnesia alumina carbon brick of this invention can be produced by heat treatment after kneading and forming a specific refractory raw material with an organic binder, the specific refractory raw material blend comprising: 8 to 18 mass% of graphite; 50 to 77 mass% of magnesia having a particle diameter of more than 74 μm and 5 mm or less; 3 to 15 mass% of magnesia having a particle diameter of 74 μm or less; 5 to 20 mass% of alumina having a particle diameter of more than 74 μm and 1 mm or less; 5 to 20 mass% of alumina having a particle diameter of not more than 74 μm and whose content of particles with a particle diameter of 10 μm or less is 30 mass% or less; and 0.5 to 3 mass% in total of one or more of aluminum, aluminum alloy and silicon, where the total amount of alumina having a particle diameter of 74 μm or more and 1 mm or less and alumina having a particle diameter of 74 μm or less is 15 to 25 mass%.SELECTED DRAWING: None
【課題】マグネシアアルミナカーボンれんがにおいて残存膨張性を付与するためにアルミナを使用することによる耐食性の低下を抑制する。【解決手段】黒鉛を８〜１８質量％、粒径７４μｍ超５ｍｍ以下のマグネシアを５０〜７７質量％、粒径７４μｍ以下のマグネシアを３〜１５質量％、粒径７４μｍ超１ｍｍ以下のアルミナを５〜２０質量％、粒径１０μｍ以下の含有率が３０質量％以下である粒径７４μｍ以下のアルミナを５〜２０質量％、並びに、アルミニウム、アルミニウム合金及びシリコンうち１種以上を合計で０．５〜３質量％含有し、しかも粒径７４μｍ超１ｍｍ以下のアルミナと粒径７４μｍ以下のアルミナの合量が１５〜２５質量％である耐火原料配合物を、有機バインダーとともに混練、成形した後、熱処理して得られるマグネシアアルミナカーボンれんが。【選択図】なし
MAGNESIA ALUMINA CARBON BRICK
To provide a magnesia alumina carbon brick capable of suppressing the decrease in corrosion resistance due to the use of alumina to impart residual expansibility.SOLUTION: A magnesia alumina carbon brick of this invention can be produced by heat treatment after kneading and forming a specific refractory raw material with an organic binder, the specific refractory raw material blend comprising: 8 to 18 mass% of graphite; 50 to 77 mass% of magnesia having a particle diameter of more than 74 μm and 5 mm or less; 3 to 15 mass% of magnesia having a particle diameter of 74 μm or less; 5 to 20 mass% of alumina having a particle diameter of more than 74 μm and 1 mm or less; 5 to 20 mass% of alumina having a particle diameter of not more than 74 μm and whose content of particles with a particle diameter of 10 μm or less is 30 mass% or less; and 0.5 to 3 mass% in total of one or more of aluminum, aluminum alloy and silicon, where the total amount of alumina having a particle diameter of 74 μm or more and 1 mm or less and alumina having a particle diameter of 74 μm or less is 15 to 25 mass%.SELECTED DRAWING: None
【課題】マグネシアアルミナカーボンれんがにおいて残存膨張性を付与するためにアルミナを使用することによる耐食性の低下を抑制する。【解決手段】黒鉛を８〜１８質量％、粒径７４μｍ超５ｍｍ以下のマグネシアを５０〜７７質量％、粒径７４μｍ以下のマグネシアを３〜１５質量％、粒径７４μｍ超１ｍｍ以下のアルミナを５〜２０質量％、粒径１０μｍ以下の含有率が３０質量％以下である粒径７４μｍ以下のアルミナを５〜２０質量％、並びに、アルミニウム、アルミニウム合金及びシリコンうち１種以上を合計で０．５〜３質量％含有し、しかも粒径７４μｍ超１ｍｍ以下のアルミナと粒径７４μｍ以下のアルミナの合量が１５〜２５質量％である耐火原料配合物を、有機バインダーとともに混練、成形した後、熱処理して得られるマグネシアアルミナカーボンれんが。【選択図】なし
MAGNESIA ALUMINA CARBON BRICK
マグネシアアルミナカーボンれんが
TAKADA SEIICHI (author) / YAMAMOTO KENZO (author) / WADA YOSHIHIRO (author)
2019-07-25
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
| European Patent Office | 2024