High Purity Hengli Corundum Bricks - Reliable China Suppliers & Factory for High Density Solutions
Features
1. High Purity
Typically composed of more than 90% alumina (Al2O3), ensuring excellent refractory properties.
2. High Temperature Resistance
Capable of withstanding temperatures up to 1900°C, making them suitable for the most demanding high-temperature environments.
3. Mechanical Strength
Corundum bricks have high compressive strength and good wear resistance, enabling them to handle heavy loads and abrasive conditions.
4. Corrosion Resistance
They resist corrosion from slags, acids, alkalis, and other chemicals, extending their lifespan in harsh environments.
5. Low Porosity
Low porosity helps prevent the infiltration of molten materials and gases, enhancing durability and thermal insulation properties.
6. Thermal Stability
They exhibit excellent thermal stability and resistance to thermal shock, which is critical for processes involving rapid temperature changes.
7. Dimensional Stability
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 | 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 |
Corundum bricks, also known as alumina bricks, are high-alumina refractory products typically composed of more than 90% alumina (Al2O3) to ensure superior refractory performance.
These bricks exhibit high temperature resistance and are capable of withstanding extreme temperatures up to 1900°C, making them suitable for severe thermal environments.
They are widely used in fertilizer, electro ceramics, petrochemical, steel, foundry, and alloy steel industries. Specific applications include secondary reformer and gas generator linings, catalyst bed supports, and reheating furnace hearths.
Low porosity prevents the infiltration of molten materials, slags, and industrial gases. This significantly improves the chemical durability and thermal insulation properties of the bricks.
Yes, corundum bricks possess excellent thermal stability and resistance to thermal shock, allowing them to withstand rapid temperature changes without structural damage.