- Time:May 16, 2023
Corundum refractory bricks are made from high-purity raw materials, typically including aluminum oxide (Al2O3) and small amounts of other metal oxides such as silicon dioxide (SiO2) and magnesium oxide (MgO). The exact composition of corundum refractory bricks can vary depending on their intended use and the specific manufacturer.
Typically, corundum refractory bricks contain a high percentage of aluminum oxide (Al2O3), usually between 90% to 99%, which gives them excellent thermal stability, high-temperature mechanical strength, and resistance to chemical corrosion. In addition, corundum refractory bricks may also contain:
1.Silicon dioxide (SiO2)
SiO2 is often added to improve the sintering behavior of corundum refractory bricks and enhance their resistance to thermal shock.
2.Magnesium oxide (MgO)
MgO is added to improve the refractoriness under load, creep resistance, and thermal shock resistance of corundum refractory bricks.
3.Titanium dioxide (TiO2)
TiO2 can help to improve the high-temperature mechanical strength and erosion resistance of corundum refractory bricks.
4.Zirconium dioxide (ZrO2)
ZrO2 is added to improve the thermal shock resistance and strength of corundum refractory bricks, especially in applications where rapid temperature changes occur.
In summary, corundum refractory bricks contain high-purity aluminum oxide as the main component, along with various secondary components such as SiO2, MgO, TiO2, and ZrO2. These materials are carefully selected and processed to produce a highly stable, strong, and resistant material that can withstand extreme temperatures and harsh chemical environments in a range of industrial applications, such as steelmaking, glass production, and petrochemical processing.
