High Purity Corundum Bricks from China - Reliable Suppliers and Factory for High Density, Low Porosity Solutions
Features
Corundum bricks, also known as alumina bricks, are high-alumina refractory products with several important features:
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 |
|---|---|---|---|---|---|
| Al2O3 | % | ≥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 x 8h) | % | ≥-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 |
Frequently Asked Questions
What are Corundum Bricks made of?
Corundum bricks, also known as alumina bricks, are high-alumina refractory products typically composed of more than 90% alumina (Al2O3) to ensure excellent refractory performance and durability in extreme environments.
What is the maximum temperature resistance of Corundum Bricks?
These bricks are designed for extreme thermal environments and are capable of withstanding temperatures up to 1900°C, making them highly suitable for heavy industrial furnace applications.
In which industries are Corundum Bricks typically applied?
They are widely used in critical industrial sectors including fertilizer production, electro ceramics, petrochemicals, steel manufacturing, foundries, alloy steel production, and refractory manufacturing.
Why is low porosity important for Corundum Bricks?
Low porosity prevents the infiltration of molten metals, chemical slags, and gases into the brick structure. This effectively enhances both the thermal insulation properties and the overall service lifespan of the brick.
How do Corundum Bricks perform under thermal shock?
Corundum bricks exhibit excellent thermal stability and high resistance to thermal shock, which prevents cracking and structural failures during rapid temperature changes within industrial kilns and furnaces.