Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Magnesia carbon brick and production method therefor
The present invention provides a magnesia carbon brick which does not contain graphite and has superior spalling resistance and corrosion resistance, and a method for producing the magnesia carbon brick. The magnesia carbon brick according to the present invention contains a total of 0.1-2.0 mass% of pitch and/or carbon black, a total of 0.1-1.0 mass% of aluminum and/or an aluminum alloy, 3.0-10.0 mass% of a magnesia having a particle size of less than 0.075 mm, and 87.0-96.0 mass% of a magnesia having a particle size of not less than 0.075 mm but less than 5 mm. The mass ratio of the magnesia having a particle size of not less than 1 mm but less than 5 mm with respect to the magnesia having a particle size of not less than 0.075 mm but less than 1 mm is 1.66-2.34. When an organic binder is added to a refractory raw material mixture which does not contain graphite, and the resultant mixture is kneaded, molded, and heated so as to obtain the magnesia carbon brick, the obtained magnesia carbon brick has an apparent porosity of 8.0% or less after being heated for 3 hours in a reducing atmosphere at 1400°C.
Magnesia carbon brick and production method therefor
The present invention provides a magnesia carbon brick which does not contain graphite and has superior spalling resistance and corrosion resistance, and a method for producing the magnesia carbon brick. The magnesia carbon brick according to the present invention contains a total of 0.1-2.0 mass% of pitch and/or carbon black, a total of 0.1-1.0 mass% of aluminum and/or an aluminum alloy, 3.0-10.0 mass% of a magnesia having a particle size of less than 0.075 mm, and 87.0-96.0 mass% of a magnesia having a particle size of not less than 0.075 mm but less than 5 mm. The mass ratio of the magnesia having a particle size of not less than 1 mm but less than 5 mm with respect to the magnesia having a particle size of not less than 0.075 mm but less than 1 mm is 1.66-2.34. When an organic binder is added to a refractory raw material mixture which does not contain graphite, and the resultant mixture is kneaded, molded, and heated so as to obtain the magnesia carbon brick, the obtained magnesia carbon brick has an apparent porosity of 8.0% or less after being heated for 3 hours in a reducing atmosphere at 1400°C.
Magnesia carbon brick and production method therefor
TOMITA YUYA (Autor:in) / TANAKA MASATO (Autor:in) / SAWAI SHIGETO (Autor:in)
03.10.2019
Patent
Elektronische Ressource
Englisch
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