Refractory BricksAlumina–silica and corundum bricks
Corundum Mullite Brick
Corundum–mullite brick for high-temperature service with high cold crushing strength, high refractoriness under load and good thermal shock resistance, in grades GMZ-75 to GMZ-90.
- Grades / types
- GMZ-90, GMZ-85, GMZ-80, GMZ-75
Product overview
Corundum mullite brick withstands high temperature, erosion and chemical attack. It has high cold crushing strength, a high refractoriness under load and good thermal shock resistance.
Key characteristics
- High temperature resistance
- Erosion resistance and chemical resistance
- High cold crushing strength
- High refractoriness under load
- Good thermal shock resistance
Technical data
| Property | Unit | GMZ-90 | GMZ-85 | GMZ-80 | GMZ-75 |
|---|---|---|---|---|---|
| Al₂O₃ | % | ≥90 | ≥85 | ≥80 | ≥75 |
| Fe₂O₃ | % | ≤0.8 | ≤1.0 | ≤1.0 | ≤1.2 |
| Apparent Porosity | % | ≤16 | ≤17 | ≤18 | ≤18 |
| Bulk Density | g/cm³ | ≥3.10 | ≥2.85 | ≥2.75 | ≥2.6 |
| Cold Crushing Strength (CCS) | MPa | ≥120 | ≥100 | ≥100 | ≥80 |
| Refractoriness Under Load, 0.2 MPa (RUL) | ℃ | ≥1700 | ≥1680 | ≥1650 | ≥1650 |
| Permanent Linear Change (PLC) (1500℃×2h) | % | ±0.1 | ±0.1 | ±0.2 | ±0.2 |
| Thermal Shock Resistance (TSR) (1100℃ Water) | cycles | ≥30 | ≥30 | ≥30 | ≥30 |
Where Refractories Are Used
Industry
Glass
Refractories in the glass industry line the melting tank, the superstructure, the working end and forehearth, the throat and the regenerator. Different furnace types take different materials, in fused, siliceous and magnesia groups: silica, clay, high alumina, sillimanite, mullite, fused mullite, zirconia-corundum, fused corundum and zirconium-containing refractory bricks.
Explore IndustryIndustry
Chemical & Petrochemical
Refractories in chemical and petrochemical plants line coal water slurry and residue oil gasifiers, secondary reformers, carbon black reactors, hydrogen production furnaces, gas generators and cracking furnaces. The technical reference's gasifier schemes build the lining from a high chrome brick working face, a chrome corundum brick backing, an alumina bubble brick insulating layer, refractory castables and a ceramic fibre coating or felt against the shell.
Explore Industry
Available grades, shapes and sizes
Available grades
- GMZ-90
- GMZ-85
- GMZ-80
- GMZ-75
Related solutions
Services that work with this family of materials.
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Technical Consultation
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