Lightweight Ultra-Low Conductivity Mullite Fire Brick
Lightweight ultra-low conductivity mullite fire bricks are a type of high-strength, low-thermal-conductivity refractory material. While retaining the advantages of traditional mullite bricks, such as high-temperature resistance and corrosion resistance, they achieve lightweight and energy efficiency through a large number of uniformly distributed micropores, making them an ideal choice for high-efficiency industrial furnaces.
Characteristics of Lightweight Ultra-Low Conductivity Mullite Bricks
Energy saving and consumption reduction
Low thermal conductivity (approximately 0.25-0.53 W/m·K at 1000℃), significantly reducing furnace heat dissipation and heat storage, and accelerating heating and cooling rates.
Structural stability
Low creep rate at high temperatures, good thermal shock resistance, can directly contact the flame, and is resistant to acid and alkali corrosion.
Reduced load
Weight can be 10%-20% lighter than traditional refractory materials, effectively reducing the load on the kiln’s steel structure.
Precise dimensions
Mostly machine-pressed, ensuring precise dimensions, accelerating construction speed and guaranteeing masonry quality.
Application of Lightweight Ultra-Low Conductivity Mullite Refractory Bricks
Hot-face lining: Serving as the working layer of a kiln, directly in contact with the flame, used in ceramic roller kilns, tunnel kilns, shuttle kilns, etc.
Backing insulation: Serving as an insulation layer behind high-temperature heavy bricks, used in hot blast stoves, petrochemical cracking furnaces, etc.
Specialty applications: Lightweight ultra-low conductivity mullite bricks are widely used in critical components such as glass crucibles, non-ferrous metal furnaces, and transition zones (using composite structures) in cement kilns.
Lightweight Ultra-Low Conductivity Mullite Brick Technical Parameters
| Item | Lightweight Ultra-Low Conductivity Mullite Brick Type I | Lightweight Ultra-Low Conductivity Mullite Brick Type II |
| Bulk Density (g/cm2) | ≤2.5 | ≤2.3 |
| Compressive Strength at Room Temperature (MPa) | 60 | 55 |
| Softening Temperature under Load (T0.6, °C) | 1500 | 1430 |
| Thermal Shock Stability (1100°C water cooling, cycles) | 9 | 8 |
| Thermal Conductivity (1000°C, W/m.k) | 1.5 | 1.4 |
| Apparent Porosity (%) | 19 | 17 |
Compared to Ordinary Lightweight Mullite Bricks
The ultra-low conductivity version has 30%~50% lower thermal conductivity across the entire temperature range, with an even greater difference in high-temperature insulation;
0.05~0.15g/cm³ lower density for the same grade, resulting in a lighter overall furnace lining;
15%~28% energy savings for intermittent kilns, and over 20% reduction in heat loss for continuous kilns;
Slightly higher unit price than ordinary JM bricks, but significantly reduced long-term fuel consumption, allowing the material price difference to be recovered within 1~2 years;
Ordinary lightweight bricks are used in conventional kilns; the ultra-low conductivity version is suitable for high-end precision projects, projects requiring frequent temperature increases and decreases, and projects with stringent energy-saving retrofitting requirements.
Lightweight Ultra-Low Conductivity Mullite Bricks Price
Our wholesale pricing for refractory bricks is flexible and subject to adjustment based on various factors, including order quantity, product specifications (dimensions and shape), refractory grade (standard, medium, or high-grade), and delivery terms. For custom lightweight ultra-low conductivity mullite bricks—specifically those with non-standard specifications or specialized refractory grades—pricing will be negotiated based on raw material costs, production complexity, and order volume.
As a reliable refractory bricks supplier, we are committed to providing you with the most competitive quotes; we will furnish a detailed quotation tailored to your specific order requirements, thereby assisting you in effectively managing your procurement costs.
Ruitai Lianxin Refractory Brick Manufacturing Process
Ruitai Lianxin refractory brick manufacturer consistently adheres to rigorous, standardized production processes to ensure that every refractory brick possesses consistent quality and reliable performance.
Why Choose Ruitai Lianxin Lightweight Ultra-Low Conductivity Mullite Bricks
Ruitai Lianxin is a leading refractory bricks manufacturer, operating its own dedicated facility and committed to providing global customers with factory-direct refractory bricks and high-quality wholesale services.
Factory-Direct Supply
As a direct-operated refractory brick manufacturer, we wholesale lightweight ultra-low conductivity mullite bricks and various other refractory bricks at direct-from-factory prices, drastically reducing your overall procurement costs.
Rigorous Quality Control
Through our comprehensive quality inspection system, we oversee everything from raw material selection to final dispatch, ensuring your lightweight ultra-low conductivity mullite fire bricks meet international standards.
Customized Furnace Solutions
The geometric structures and heat loss zones of different kilns vary widely. In addition to supplying standard bricks, we can directly manufacture a wide range of custom-shaped refractory bricks based on your engineering CAD drawings.
Extensive Export Experience
With twenty years’ experience in the export of refractory products, we expertly manage customs clearance procedures, providing one-stop logistics services within 15-30 working days.
Ruitai Lianxin Refractory Brick Customer Case
Ruitai Lianxin focus on exporting high-standard refractory bricks and providing factory-direct refractory bricks to industrial clients worldwide. Our products and customized refractory fire brick solutions are widely praised globally, and we have stable, long-term partners in many countries,including Uzbekistan, Syria, and Pakistan. Ruitai Lianxin will continue to pursue mutual benefit and win-win results through in-depth cooperation with global refractory brick customers.
Contact us
As a professional refractory brick manufacturer, supplier, and factory, we offer high-quality factory-direct refractory bricks and wholesale services, and can customize kiln solutions to meet your needs. Contact us now, and our team will reach out to you as soon as possible to provide you with the best factory quote.