Magnesian iron brick and magnesian chromic brick are two kinds of common fireproof material, they differ somewhat on composition, function and utility.
Magnesian iron brick 1. Comprise brick of composition magnesian iron: Bases is magnesian (MgO) and ferric oxide (Fe₂O₃) . Generally speaking, the magnesian content in magnesian iron brick is higher, and ferric oxide content is inferior.
Magnesian chromic brick: Bases is magnesian (MgO) and oxidation chromium (Cr₂O₃) . The magnesian content in magnesian chromic brick is in normally 60% above, and oxidation chromic content is controlled in 10-20% .
2.Brick of fireproof function magnesian iron: Magnesian iron brick is had taller fireproof degree, be in commonly above of 1800 ° C. Have good heatproof shake sex and high temperature strength, apply to the environment with high temperature bigger wave motion. Thermal stability is better, but may be eroded in certain and chemical environment.
Magnesian chromic brick
Of magnesian chromic brick fireproof degree very tall also, arrive in 1700 ° C normally between 1900 ° C. Have the exceedingly good sex that fight broken bits and corrosion resistance, behave in acidity and basic slag especially good. Thermal stability is excellent, good structure and property can hold below high temperature.
3.Chemical stability is magnesian iron brick: Behave in oxidation atmosphere good, but may be affected reductively in reducing atmosphere by ferric oxide. General to the sex fighting corrode of acid slag, but still can maintain stability in certain and special environment.
Magnesian chromic brick: Have excellent chemical stability, behave in acidity and alkalescent environment especially good. Right all sorts of slaggy have the good sex that fight corrode with high temperature atmosphere, it is especially in the environment that contains the impurity such as sulfur, phosphor.
4.Apply brick of domain magnesian iron: Basically use at the high temperature equipment in metallurgical industry, wait like steel-making furnace, blast furnace and electric stove. There also is application in equipment of high temperature of certain chemical industry, need especially taller fireproof degree of circumstance with thermal shock sex.
Magnesian chromic brick: Apply extensively at all sorts of high temperature lining in metallurgical industry, wait like converter, finery, electric stove. There also is wide application in the high temperature equipment such as cement kiln, glass kiln, the performance in the environment that fights corrode sex high in need especially is good. Apply to nonferrous metal smelt, petro-chemical the high temperature equipment that waits for an industry. Environmental protection and security
Magnesian iron brick: Because bases is magnesian with ferric oxide, its are made and use a process to be affected to the environment relatively lesser.
Magnesian chromic brick: Contain oxidation chromium, oxidation chromium may produce 6 price chromic compound below high temperature, this kind of compound has potential harm to environment and health. Accordingly, be being used and need to take proper environmental protection and safety precaution in deserted processing process.
Brick of summary magnesian iron and magnesian chromic brick have its advantage and suitable scope each. Magnesian iron brick applies to the environment with high temperature bigger wave motion with its good thermal shock sex and high temperature intensity; And magnesian chromic brick fights broken bits sex and corrosion resistance exceedingly goodly to apply to more harsh chemical environment with its. When choosing specific and fireproof material, answer to ask to have logical choice according to using environment and technology actually.
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