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Product introduction of corundum brick
The raw material of corundum brick is a solid solution composed of aluminum oxide and chromium oxide in a certain proportion by melting at high temperature. Using special refractory production process to make corundum bricks can improve the internal quality of products and high temperature performance.
Features of corundum brick
Corundum brick has acid making, alkali chemical slag, metal and glass melt, etc. It can reduce oxidizing atmosphere and atmosphere under high temperature and obtain good use effect.
Application of corundum brick
The corundum brick is mainly used in the furnace or hot blast furnace of the furnace, refining furnace outside the furnace, sliding water device, glass furnace, petrochemical furnace, etc.
Corundum bricks index:
| 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 |
Note: PT - ordinary pouring products; QX - inclined pouring products; MS - dense pouring products; Ws - keyless casting.
Welcome to contact us for more information on corundum bricks.