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Product introduction of corundum brick
The raw material of corundum brick is a kind of solid solution synthesized by alumina and chromium oxide according to a certain proportion through high temperature melting. It can improve the internal quality and high temperature performance of refractory brick made by special refractories production process.
Features of corundum brick
Corundum brick has acid and alkali chemical properties of slag, metal and glass melt, it can be used in high temperature oxidation atmosphere, reducing atmosphere can receive good effect.
More relevant refractory products: Mullite insulation brick JM30
Parameters of Corundum bricks
| ltem | Ultra Purity Corundum Brick | 99 Corundum Brick | 90 Corundum Brick | Corundum-Mullite Brick |
| Al2O3% | ≥99.3 | ≥98.5 | ≥90 | ≥80 |
| SiO2% | ≤0.15 | ≤0.3 | ≤8.5 | ≤18.5 |
| Fe2O3% | ≤0.1 | ≤0.2 | ≤0.2 | ≤0.3 |
| Bulk density, g/cm3 | ≥3.25 | ≥3.25 | ≥3.1 | ≥2.9 |
| Apparent porosity, % | ≤18 | ≤18 | ≤18 | ≤18 |
| Cold crushing strength, MPa | ≥100 | ≥100 | ≥120 | ≥120 |
| Refractoriness under load, ℃(0.2MPa,0.6%) | ≥1700 | ≥1700 | ≥1700 | ≥1700 |
| Reheating linear change rate, %(1600℃ x 8h) | -0.2 | -0.2 | 0.2 | 0.2 |
| Thermal expansion coefficient, x 10-6 (Room temp. to 1300'C) | 8.1 | 8.1 | 8.1 | 7.6 |
Fused zirconium corundum brick index:
| ltem | AZS-33 | AZS-33 | AZS-36 | AZS-36 | AZS-41 | AZS-41 |
| Y | H | Y | H | Y | H | |
| Al2O3≥ | 90 | 90 | 90 | 90 | 90 | 90 |
| ZrO2≥ | 32.0 | 32.0 | 35.0 | 35.0 | 40.0 | 40.0 |
| SiO2≤ | 16.0 | 17.0 | 13.5 | 14.5 | 13.0 | 14.0 |
| Na2O≤ | 1.5 | 1.5 | 1.4 | 1.4 | 1.3 | 1.3 |
| Fe2O3+TiO2+CaO+MgO +Na2O+K2O+B2O3≤ | 2.5 | 3.0 | 2.5 | 3.0 | 2.5 | 3.0 |
| BD, PT.QX ≥ | 3.40 | 3.30 | 3.45 | 3.40 | 3.55 | 3.50 |
| BD, MS≤ | 3.50 | 3.45 | 3.60 | 3.55 | 3.70 | 3.65 |
| BD, WS≤ | 3.60 | 3.55 | 3.70 | 3.65 | 3.80 | 3.75 |
Welcome to contact us for more information on corundum bricks.