Kerui’s lightweight insulating fire bricks have high porosity, excellent thermal insulation performance and high temperature resistance. They are suitable for building the thermal insulation layer and heat preservation layer of industrial kilns. The fire brick insulation we produce can reduce the weight of the furnace body and shorten the operation time of the kiln. It can also reduce heat diffusion and ensure uniform furnace temperature. Cooperate with Kerui to escort your industrial project!
Kerui’s Top 5 Best-Selling Lightweight Insulating Fire Bricks
Name | High Alumina Insulation Brick | Fire Clay Insulation Brick | Mullite Insulation Brick | Alumina Bubble Brick | Silica Insulation Brick |
---|---|---|---|---|---|
Main Content | ≥48% Al2O3 | 30%-46% Al2O3 | 40%-77% Al2O3 | 90%-99% Al2O3 | ≥91% SiO2 |
Bulk Density | 0.5-1.2g/cm³ | 0.5-1.5g/cm³ | 0.5-1.35g/cm³ | 1.3-1.9g/cm³ | 1.0-1.2g/cm³ |
Thermal Conductivity Coefficient | 0.2-0.55 W/(m·K) | 0.23-0.65 W/(m·K) | 0.18-0.56 W/(m·K) | 0.9-1.2 W/(m·K) | 0.55-0.7 W/(m·K) |
Cold Crushing Strength | 1.0-4.5 MPa | 0.8-6.0 MPa | 0.9-3.5 MPa | 6-18 MPa | 2-5 MPa |
Advantages | Good Chemical Resistance | Cost-Effective | High Refractoriness | High Strength | Good Acid Resistance |
Different Uses of Lightweight Insulating Fire Bricks
The raw materials, characteristics and use temperatures of different types of lightweight insulation bricks are different. Therefore, the kilns and furnace parts they are suitable for are also different. If you don’t know what material insulation bricks are suitable for your kiln, leave your contact information and kiln type. Our professional technical team is always available to provide you with technical assistance.
- Fire clay insulation brick: The use temperature of this insulation brick is 1200℃ – 1400℃. It is used as an insulation layer material for various industrial kilns that do not contact molten materials and have no corrosive gas effects.
- High alumina insulation brick: The use temperature of ordinary lightweight high-alumina bricks is 1350℃ – 1500℃. So, high alumina insulation brick is suitable for kilns with hydrogen, CO and other gases as a protective atmosphere.
- Mullite insulation brick: The use temperature is 1350℃ – 1700℃. It can directly contact the flame. For example, it is used for the working layer lining of cracking furnaces and hot blast furnaces.
- Silica insulation brick: The use temperature is 1200℃ – 1500℃. So, it is suitable for use in high-temperature kilns that do not contact slag. Such as the insulation of the silica brick lining of high-temperature hot blast furnaces and the insulation of silica brick masonry in glass kilns.
- Alumina bubble brick: Its operating temperature is 1800℃. It is widely used in petrochemical industrial gasification furnaces, carbon black industrial reactors, and industrial induction furnaces.
Kerui Direct Selling Manufacturer Vs Other Middlemen
Compare Quality
- We: Good quality. Standardized production, strict control and quality inspection department checks at every level.
- They: High turnover of personnel, unstable after-sales service and lack of professional technology.
Compare Price
- We: Well-equipped, high-tech assembly line production. 30% lower cost than middlemen, preferential insulation bricks price. Kerui manufacturer is at zero distance from consumers.
- They: Second-hand agents get goods, prices are high, and quality varies.
Compare Delivery
- We: Kerui Group’s production department and delivery logistics personnel provide 24-hour uninterrupted service to ensure timely delivery.
- They: Time cannot be controlled and third-party logistics are high risk.

Real Photos of Kerui Factory and Lightweight Fire Bricks
The Kerui factory is a real large-scale factory that specializes in the production of insulation bricks. Kerui uses advanced production equipment and processes to ensure the stability and reliability of the quality of refractory products.
The actual photos show that the production line inside the Kerui factory operates efficiently. These pictures fully demonstrate the professionalism and high standards of the Kerui factory in the production of insulation bricks.
Service Promise of Kerui Lightweight Insulating Fire Bricks for Sale
Pre-sales Service
Contact us for free samples, and try before you buy. Moreover, Kerui can provide free technical support. There are not many samples left at present, so don’t hesitate, to contact us now!
About Price
We support processing and customization. The prices of lightweight fire brick of different materials are also different. But we promise to provide 100% factory price! If you have special requirements, please contact us.
Contact Customer Service
Buy lightweight firebrick, and choose Kerui for guaranteed quality. Besides, we recommend that you contact customer service first to tell us your detailed needs. Such as drawings, technical indicators, quantity and size, etc.
After-sales Service
Our products undergo a strict quality inspection process before shipment to ensure product quality. Please check carefully after receiving the goods. If you have any questions, please contact us in time. You can also watch the detailed quality inspection process of Kerui firebrick insulation on our YouTube account.