Corundum brick is fired under the situation of high temperatures to make a matrix with mullite, mullite-corundum or corundum which has excellent bulk stability, good chemical stability and mainly used for linings of gasifier, carbon black reactor, gas-making furnace, aminolysis oven, secondary reformer in the field of petrochemical industry, super high temperature kiln in the field of refractory ceramic industry and high blast furnace in the field of metallurgy industry.
Description for Corundum Brick
Corundum brick enjoys popular like in the industry manufacturing. Corundum brick not only plays a good performance in fire-resistant, but also has strong resistant to erosion. Corundum bricks are refractory products with over 90% content of Al2O3 and its principal crystalline phase is corundum. The service temperature of Corundum Bricks reaches up to 1800°C. Corundum brick price is mainly subjected to its raw materials.
Classification of Corundum Brick
Classify corundum refractory into two types according to the content of Al2O3 from 90% to 99%:
High purity corundum products: with 98%~99% content of Al2O3.
Low purity corundum products: with 90%~98% content of Al2O3.
Classify corundum refractory into two types according to manufacturing process:
Sintered corundum brick
Fused corundum block
Technical Index
Corundum Brick
| Corundum Brick | ||||||
| Item | Index | |||||
| Unit | CMC | C90 | C95 | C98 | ||
| Al2O3 ≥ | % | 85 | 90 | 95 | 98 | |
| Fe2O3 ≤ | % | 0.5 | 0.8 | 0.6 | 0.4 | |
| Cr2O3 ≥ | % | — | — | — | — | |
| Apparent porosity ≤ | % | 20 | 20 | 20 | 20 | |
| Bulk density ≥ | g/cm3 | 2.8 | 3.0 | 3.05 | 3.1 | |
| Cold crushing strength ≥ | Mpa | 40 | 80 | 80 | 80 | |
| Refractoriness under load (0.2Mpa) ≥ | ℃ | 1500 | 1700 | 1700 | ＞1700 | |
| Reheating linear change | 1550℃*2h | % | — | ±0.1 | ±0.1 | — |
| 1600℃*2h | % | — | — | — | ±0.1 | |
Chrome Corundum Brick & Titanium Corundum Brick
| Item | Unit | CMC | Chrome Corundum Brick | Titanium Corundum Brick | |
| (CC12) | (TC) | ||||
| Al2O3 ≥ | % | 85 | 73 | 94 | |
| Fe2O3 ≤ | % | 0.5 | 1.0 | 0.4 | |
| Cr2O3 ≥ | % | — | 12 | (TiO2) 1.0 | |
| Apparent porosity ≤ | % | 20 | 20 | 2 | |
| Bulk density ≥ | g/cm3 | 2.8 | 3.0 | 3.6 | |
| Cold crushing strength ≥ | Mpa | 40 | 50 | 300 | |
| Refractoriness under load (0.2Mpa) ≥ | ℃ | 1500 | 1700 | 1650 | |
| Reheating linear change | 1550℃*2h | % | — | — | ±0.1 |
| 1600℃*2h | % | — | ±0.2 | — | |
Properties of Corundum Brick
- High cold crushing strength reaches up to 340MPa.
- High initial refractoriness under load is greater than 1700℃。
- Good chemical stability.
- With strong resistance to acid and basic slag erosion.
- With strong resistance to metal and molten glass erosion.
- Thermal shock resistance is related to its structure.
- Dense products have strong resistance to erosion, but its thermal shock resistance is weak.
Application of Corundum Brick
Corundum Bricks are mainly made for extreme demands of high temperature service based on itself materials structure.
Corundum brick is mainly used for linings of gasifier, carbon black reactor, gas-making furnace, aminolysis oven, secondary reformer in the field of petrochemical industry, super high temperature kiln in the field of refractory ceramic industry and high blast furnace in the field of metallurgy industry.
Rongsheng Refractory as a professional corundum refractory bricks supplier has been insisting on corundum brick manufacturing for more than 20 years. Rongsheng has strictly production management, professional sales team and engineers and responsible service attitude trying to satisfy your special requirement for corundum brick sizes, high quality and corundum brick cost.
