// SPEC · Refractory Raw Materials
Sintered Mullite Aggregate Al2O3 72% 1-3mm
Sintered Mullite Aggregate Al2O3 72% in 1-3mm grade provides balanced strength and thermal stability as the primary aggregate backbone in kiln furniture castables and high-alumina monolithic refractory mixes.
// Key Features
- Optimal 1-3mm grading as primary aggregate backbone for kiln furniture and castables
- Excellent volume stability under cyclic thermal loading up to 1700°C
- High strength-to-porosity ratio for load-bearing monolithic applications
- Low SiO2 content minimizing viscous deformation and creep at elevated temperatures
// Technical Specifications
| SiO2 (%) | ≤26 |
| Al2O3 (%) | ≥72 |
| Apparent Porosity (%) | ≤12 |
| Available Grain Sizes | 1–3 mm |
| Bulk Density (g/cm³) | ≥2.60 |
// Applications
Kiln furniture setter plate and sagger casting aggregateCement rotary kiln chain zone and transition zone monolithic liningSteel ladle alumina-mullite backup lining castableContinuous casting tundish permanent lining compoundIndustrial heat treatment furnace hearth castable
// Quick Specs
Max Temperature1700°C
Thermal Conductivity2.5 W/(m·K) at 1000°C
Density2.65 g/cm³
StandardGB/T 26568
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