High Purity Corundum Bricks from China - Top Suppliers & Factory for Thermal Shock Resistance and High Density
Features
Typically composed of more than 90% alumina (Al2O3), ensuring excellent refractory properties.
Capable of withstanding temperatures up to 1900°C, making them suitable for the most demanding high-temperature environments.
Corundum bricks have high compressive strength and good wear resistance, enabling them to handle heavy loads and abrasive conditions.
They resist corrosion from slags, acids, alkalis, and other chemicals, extending their lifespan in harsh environments.
Low porosity helps prevent the infiltration of molten materials and gases, enhancing durability and thermal insulation properties.
They exhibit excellent thermal stability and resistance to thermal shock, which is critical for processes involving rapid temperature changes.
High alumina content ensures that the bricks maintain their shape and volume at high temperatures, preventing structural failures.
Typical Application
Widely used in the industries such as fertilizer, electro ceramics, petrochemical, steel, foundry, alloy steel, refractories, etc. Typical application such as secondary reformer and gas generator lining, catalyst bed support, channel induction furnace, reheating furnace hearth, etc.
Typical Indexes
| Grade | Unit | HA-99 | HA-98 | HA-90 | HA-80 |
|---|---|---|---|---|---|
| AI2O3 | % | ≥97.5 | ≥97 | ≥90 | ≥80 |
| SiO2 | % | ≤0.18 | ≤0.2 | ≤8.5 | ≤18.5 |
| Fe2O3 | % | ≤0.05 | ≤0.1 | ≤0.2 | ≤0.3 |
| Bulk Density | g/cm3 | ≥3.15 | ≥3.1 | ≥3.1 | ≥2.9 |
| Apparent Porosity | % | ≤16 | ≤17 | ≤18 | ≤18 |
| Cold Crushing Strength | MPa | ≥110 | ≥100 | ≥120 | ≥120 |
| Refractoriness under load (0.1 MPa, 0.6%) | °C | ≥ 1700 | ≥ 1700 | ≥ 1700 | ≥ 1700 |
| Reheating Linear Change (1600°C x8h) | % | ≥-0.2 | ≥-0.2 | ≤0.2 | ≤0.2 |
| Thermal expansion coefficient x10-6 Room temp. to 1300°C | - | 8.1 | 8.1 | 8.1 | 7.6 |
