High-Quality Corundum Bricks from China Suppliers - Hengli Factory Products for Superior Thermal Resistance
Hengli Corundum Bricks, manufactured in our state-of-the-art factory in China, are composed of high purity tabular alumina and fused alumina, which are sintered in high-temperature shuttle kilns. These bricks are renowned for their high density, exceptional purity, low porosity, and outstanding thermal shock resistance. As reliable suppliers of corundum bricks, Hengli offers products that can withstand corrosion in both oxidizing and highly reducing atmospheres, as well as high-temperature hydrogen attacks. We provide Hengli Corundum Bricks in standard sizes such as straight, arches, and wedges, along with customized plates and shapes to meet specific customer needs.
Corundum bricks, also known as alumina bricks, are high-alumina refractory products with several important 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.
These features make corundum bricks ideal for use in various high-temperature applications, including blast furnaces, hot blast stoves, steel ladles, and other industrial furnaces and kilns.
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
All data above are average test results under standard procedure and are subjected to variation. Result should not be used for specification purpose or creating any contractual obligation. For more information on the safety application or materials, please contact with our sales engineer.
Frequently Asked Questions
What is the maximum temperature corundum bricks can withstand?
Corundum bricks are capable of withstanding extreme temperatures up to 1900°C, making them ideal for demanding high-temperature industrial environments.
What are the typical chemical compositions of corundum bricks?
Corundum bricks feature high purity, typically composed of more than 90% alumina (Al2O3). Higher grades like HA-99 and HA-98 contain ≥97.5% and ≥97% Al2O3 respectively, ensuring excellent refractory performance.
Which industries widely use corundum bricks?
These bricks are widely used in industries such as fertilizer, electro ceramics, petrochemical, steel, foundry, alloy steel, and refractories.
What are the specific applications of corundum bricks?
Typical applications include secondary reformers, gas generator linings, catalyst bed supports, channel induction furnaces, reheating furnace hearths, blast furnaces, hot blast stoves, and steel ladles.
Why is the low porosity of corundum bricks important?
Low porosity prevents the infiltration of molten materials and corrosive gases, which directly enhances the durability, chemical resistance, and thermal insulation properties of the bricks.
