Lightweight Mullite Brick
Ruitai Lianxin’s lightweight mullite refractory bricks combine the excellent high-temperature stability and superior thermal insulation properties of mullite. Unlike traditional refractory bricks, they feature precisely controlled pore size distribution and optimized matrix composition. This allows them to maintain sufficient structural integrity while providing reliable thermal insulation, making them one of the most cost-effective energy-saving refractory material solutions for medium- and high-temperature industrial furnaces.
Features of Lightweight Mullite Bricks
Ruitai Lianxin lightweight mullite bricks maximize energy efficiency while ensuring structural reliability. Their core characteristics include the following:
- Low Thermal Conductivity : Uniformly distributed micropores minimize heat transfer by conduction and radiation, significantly reducing heat loss through furnace walls and cutting fuel consumption.
- Good Thermal Shock Resistance : The porous structure accommodates thermal expansion and contraction, resisting cracking during temperature cycling and extending lining service life.
- High fire resistance : Lightweight mullite bricks can withstand continuous operating temperatures up to 1450°C, making them suitable for various medium- and high-temperature processes.
- Low Bulk Density : Much lighter than dense refractory fire bricks, reducing the dead load on kiln steelwork and foundations, enabling thinner wall designs and lower construction costs.
Classification of Lightweight Mullite Bricks
For lightweight mullite bricks, Ruitai Lianxin, as a professional refractory material supplier, mainly offers two main product series to meet different application needs:
Lightweight (insulating) mullite brick series : with ultra-low bulk density and thermal conductivity, it is designed for backing insulation layers and non-direct flame areas that require maximum energy saving.
Lightweight Mullite Brick
| MD-0.5 | MD-0.6 | MD-0.8 | MD-1.0 | ||
| Chemical Component (%) | AL₂O₃ (%)≥ | 45 | 55 | 65 | 72 |
| Fe₂0₃%≤ | 0.8 | 0.8 | 0.7 | 0.6 | |
| Bulk Density(g/cm3)≥ | 0.5 | 0.6 | 0.8 | 1 | |
| Cold Crushing Strength(Mpa)≥ | 2.0 | 2.5 | 3.0 | 4 | |
| Thermal Conductivity W/m.k≤ | 400℃ | 0.18 | 0.26 | 0.28 | 0.3 |
| 600℃ | 0.22 | 0.3 | 0.32 | 0.35 | |
| 900℃ | 0.26 | 0.32 | 0.36 | 0.4 | |
| Linear Change on Reheating ℃xh≤1.0% | 1350×12 | 1350×12 | 1450×12 | 1450×12 | |
Low thermal conductivity mullite brick series : with higher density and cold-pressed strength, suitable for working furnace linings in areas with moderate temperatures and limited erosion, where energy conservation remains a primary consideration.
Lightweight Low Thermal Conductivity Mullite Brick
| Item | 1 | Ⅱ |
| Bulk Density (g/cm³)≤ | 2.5 | 2.3 |
| Apparent Porosity(%)≤ | 17 | 19 |
| Cold Crushing strength (MPa)≥ | 60 | 55 |
| Refractoriness Under Load (T0.6 ℃)≥ | 1500 | 1430 |
| Thermal Shock resistance(950℃ water-quenching,cycle)≥ | 9 | 8 |
| Thermal conductivity (1000℃) W/m·K) | 1.5 | 1.4 |
Widespread Application of Lightweight Mullite Bricks
Lightweight mullite insulating bricks are renowned for their superior insulation properties and reliable high-temperature strength, and are widely used in various industrial sectors. As a direct-sale refractory brick factory supplier, we can provide customized kiln insulation solutions based on the specific operating conditions of different industries.
Used as an insulating lining for blast furnaces, heat treatment furnaces, and ladle preheating stations. Its lightweight properties reduce the overall weight of the refractory lining while providing effective insulation to minimize heat loss.
It is widely used in the backing insulation layer or working lining of tunnel kilns, shuttle kilns, and roller hearth kilns. Its low thermal conductivity helps to maintain a uniform temperature distribution throughout the firing process and reduces energy consumption per unit output.
Primarily used as insulation in the regenerator chambers, tank walls, and superstructure of glass melting furnaces. Its high alumina content ensures excellent resistance to alkali vapors and compatibility with glass raw material components.
Applications include equipment such as cracking furnaces, reformers, and process heaters, where stable thermal insulation and resistance to thermal cycling are crucial for reliable operation and energy efficiency.
Why Choose Ruitai Lianxin Lightweight Mullite Bricks?
As a seasoned manufacturer of lightweight mullite bricks in China, Ruitai Lianxin is committed to providing consistently high-quality thermal insulation and refractory materials to help global customers reduce energy costs and improve kiln efficiency. Our advantages lie in:
Factory Direct Sales
We own a factory with an annual capacity of 67,000 tons, and enjoy additional discounts on full containers.
Stable Batch Quality
Our ISO-certified production process ensures systematic quality testing for every batch of products.
Custom Sizes and Shapes
We offer firebricks in standard sizes and custom shapes to meet your kiln design requirements.
Reliable Delivery Time
Our strong production capacity ensures on-time delivery for both trial orders and full container orders.
Lightweight Mullite Insulation Brick Price
Lightweight mullite insulating brick prices vary based on density grade, dimensions and order volume. As a reliable refractory brick manufacturer, we deliver competitive quotations for global kiln operators. Reach out to us to receive the exact FOB cost of insulating mullite brick and customized solutions quickly.
Ruitai Lianxin Refractory Brick Manufacturing Process
Our standardized production line ensures consistent quality for every batch of lightweight mullite bricks:
Ruitai Lianxin Refractory Brick Customer Case
As one of China’s leading professional refractory material manufacturers, we focus on exporting high-standard refractory bricks and providing factory-direct refractory bricks to industrial clients worldwide. Our products and customized kiln fire bricks solutions are widely praised globally, and we have stable, long-term partners in many countries, including Uzbekistan, Syria, and Pakistan.
Pakistan | Corundum Refractory Fire Brick | Rotary Kiln Lining
Egypt | Sintered Zirconia Corundum Bricks | Glass Kiln
Russia | Magnesium Chrome Brick | Cement Kiln Refractory Bricks
Syria | Refractory Cement | Blast Furnace Refractory Materials
Uzbekistan | Magnesium Aluminum Chromium Spinel Brick | Rotary Kiln
Indian Customers | High Alumina Refractory Fire Brick | Cement Kiln
Cooperation Partners
Contact Us
If you are looking for a reliable refractory brick manufacturer or supplier, or need wholesale services for lightweight mullite bricks and other fire bricks, contact us today for a free quote—please provide your kiln specifications, required grade, and estimated quantity. Our team will reply within 24 hours with competitive pricing and technical advice.