Lightweight mullite bricks are high-alumina refractory materials with mullite as the main crystalline phase, typically containing 65%–75% Al₂O₃. In addition to mullite, products with lower alumina content may also contain small amounts of glass phase and cristobalite, while those with higher alumina content may contain small amounts of corundum.
They are mainly used in hot blast stove roofs, blast furnace walls and bottoms, glass melting furnace regenerators, ceramic sintering kilns, and dead-zone linings in petroleum cracking systems.
|
Brand |
HXM-23 |
HXM-24 |
HXM-26 |
HXM-28 |
HXM-30 |
|
Classification temperature ℃ |
1260 |
1350 |
1430 |
1540 |
1650 |
|
Bulk density g／cm3 ＜ |
0.6 |
0.8 |
0.8-1.0 |
0.9-1.1 |
1.0-1.2 |
|
Compressive strength Mpa ≥ |
1.3 |
2.0 |
3.0 |
3.5 |
3.5 |
|
Changes in reheated lines ％(℃) |
1250×12 - 0.5 |
1320×12 -0.5 |
1400×12 -0.5 |
1510×12 -0.9 |
1600×12 -0.9 |
|
thermal conductivity W／m．K (350±25℃) |
0.22 |
0.26 |
0.26 |
0.32 |
0.41 |
|
Fe2O3 % ＜ |
1.2 |
1.2 |
1.2 |
1.0 |
1.0 |
Lightweight mullite bricks feature low thermal conductivity and low heat capacity, high purity with low impurity content, and excellent high-temperature resistance, allowing direct exposure to flames. They also offer high strength, outstanding thermal shock resistance, precise dimensions, and can be easily cut and processed as required.
Lightweight mullite bricks have high refractoriness, exceeding 1790 °C. Their refractoriness under load ranges from 1600–1700 °C, and their compressive strength at room temperature is 70–260 MPa. They also offer excellent thermal shock resistance. These bricks are commonly used as a working layer or a medium- to high-temperature insulation layer in industrial furnaces and kilns. They can also be used in combination with high-alumina bricks, lightweight high-alumina bricks, and ceramic fiber materials to create highly efficient, energy-saving furnace lining systems.
As industrial furnaces and kilns continue to develop toward energy efficiency and lightweight design, lightweight mullite bricks have become an important alternative to some traditional insulating bricks due to their balanced performance. Their core performance comes from the stable mullite crystalline phase formed within the material, which provides excellent thermal stability and creep resistance at high temperatures, reducing the risk of structural deformation during long-term operation.
Shandong Haixin Refractory Materials Co., Ltd. relies on a comprehensive raw material control system and mature firing technology to precisely control the pore structure, strength, and thermal properties of lightweight mullite bricks. This ensures consistent and stable product performance and meets the combined insulation and refractory requirements of various industrial furnaces.
If you are looking for lightweight refractory bricks that combine excellent insulation performance with high-temperature stability for your industrial furnace project, please feel free to contact Shandong Haixin Refractory Materials Co., Ltd. We can provide professional product selection advice and complete energy-saving furnace lining solutions based on your furnace structure and operating temperature.
Lightweight mullite bricks are widely used as lining and backing materials for industrial furnaces in industries such as metallurgy, petrochemicals, building materials, ceramics, and machinery manufacturing. They are suitable for cracking furnaces, reforming furnaces, heating and refining units, regeneration units, hot blast stoves, heat treatment furnaces, resistance furnaces, tunnel kilns, roller kilns, shuttle kilns, bell kilns, and glass tank furnaces.
Based on more than 30 years of experience in refractory material research and engineering applications, Shandong Haixin Refractory Materials has always adhered to the principles of reliable performance, stable quality, and high application compatibility. We continue to provide global customers with cost-effective refractory solutions designed for long-term stable operation.
1. Strict Raw Material Selection System
We carefully select high-purity functional raw materials, including premium bauxite, mullite, corundum, and lightweight aggregates, to control product quality from the source. With our own raw material production line and a strict incoming inspection system, we ensure stable chemical composition and low impurity content, providing a reliable foundation for key properties such as high-temperature resistance and corrosion resistance.
2. Mature Formulations and Refined Production Process
With the support of automated and digital production equipment, we precisely control the entire process, including raw material grading, mixing time, molding pressure, and firing conditions. This ensures a high level of consistency in key performance indicators such as strength, density, and thermal conductivity.
3. High Compatibility Between Product Performance and Operating Conditions
Rather than simply pursuing extreme technical indicators, we focus on matching refractoriness, strength, thermal insulation performance, and service life according to different industries, furnace types, and application areas. This ensures that material performance truly meets actual working conditions.
4. Complete Testing System
Our technical center is equipped with advanced testing equipment, including dilatometers, refractoriness-under-load testers, thermal conductivity meters, thermal shock testing equipment, and high-temperature test furnaces. This allows us to carry out comprehensive product testing and provide complete physical and chemical property reports.
5. Dual Support: Products + Engineering Experience
We are not only a manufacturer of refractory materials but also provide furnace and kiln engineering support and technical services. Our products have been verified in numerous real-world projects in industries such as metallurgy, petrochemicals, ceramics, and power generation, giving us extensive practical application experience.
6. Customized Production for Complex Projects
We can customize product formulations, specifications, and performance levels based on customers' operating temperature, atmospheric conditions, installation methods, and energy-saving requirements. This ensures a high level of compatibility between the materials and the project.
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