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Building 1, Zone 1, Greenland Binhu International City, Zhengzhou, Henan, China
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Magnesia-chrome Fire Bricks
Magnesia-chrome fire bricks are alkaline refractory fire bricks primarily composed of periclase (MgO) and chromite (FeO・Cr₂O₃).
Key Indicators:
MgO and Cr₂O₃ Ratio: Higher total MgO and Cr₂O₃ content indicates fewer impurities, resulting in stronger high-temperature resistance and erosion resistance.
Apparent Porosity and Bulk Density: Lower apparent porosity and higher bulk density indicate a denser brick structure and stronger resistance to slag penetration.
Load Softening Temperature: Directly reflects the structural stability of the brick under high-temperature pressure and is a core indicator for determining its suitability for high-temperature kiln applications.
Reheat Linear Change Rate: A value closer to 0 indicates less volume shrinkage/expansion during high-temperature use. In order to preventing cracking at the brick joints in the kiln.
Applications:
Building Materials Industry: Core components of cement rotary kilns. This is the primary application area for magnesia-chrome fire bricks, suitable for the strongly alkaline environment of cement clinker calcination.
Used in rotary kiln firing zones: In direct contact with high-temperature clinker (1450-1550℃) and alkaline kiln ash, resisting slag erosion, material scouring, and sudden temperature changes. High-quality magnesia-chrome fire bricks can significantly extend the service life of the kiln body.
Used in cement kiln secondary calcining furnaces and decomposition furnace linings: Resisting high-temperature gas flow erosion and alkali metal vapor corrosion.
Metallurgical industry: Suitable for non-ferrous/ferrous metal smelting furnaces in strongly reducing atmospheres and alkaline slag conditions.
Non-ferrous metal smelting: Used in the slag line zone, tuyeres zone, and furnace linings of copper, nickel, and lead furnaces. In order to resisting the erosion of heavy metal slag and sulfides, such as in flash furnaces and blast furnace linings.
Ferrous metal smelting: Used in the furnace walls and bottom of electric steelmaking furnaces, as well as the tapping troughs and slag troughs of blast furnaces. In order to resisting the erosion of molten steel and iron and alkaline slag corrosion.