- Time:May 22, 2023
Spinel fire bricks are high-performance refractory materials made from spinel and other raw materials. They are widely used in high-temperature applications such as steelmaking, nonferrous metallurgy, and glass production. The physical and chemical indicators of spinel fire bricks may vary depending on the specific manufacturing process and application requirements. However, some typical indicators are:
1.Chemical composition: Spinel fire bricks consist mainly of MgO, Al2O3, Fe2O3, and other oxides depending on the specific formulation.
2.Bulk density: Typically ranges from 2.8 to 3.1 g/cm³, indicating a relatively high density and good mechanical strength.
3.Apparent porosity: Usually below 18%, which indicates a low porosity and good resistance to slag penetration.
4.Cold crushing strength: Can range from 60 to 150 MPa, indicating a high mechanical strength and good resistance to thermal shock.
5.Thermal conductivity: Typically around 2.0-2.5 W/(m·K), which is lower than that of regular fire bricks, indicating good insulation properties.
6.Refractoriness: Spinel fire bricks have a high refractoriness of up to 1750-1800°C, making them suitable for use in high-temperature environments.
7.Thermal expansion coefficient: Normally between 0.3×10^-6/°C to 1.0×10^-6/°C, indicating good thermal stability under high-temperature conditions.
The above indicators are just general reference values, and the actual physical and chemical indicators of spinel fire bricks may vary depending on the specific manufacturing process and application requirements.
