Alumina Insulation Brick
Your Professional Alumina Insulation Brick Supplier
Our goal is to become your true partner in the field of alumina insulation brick in China. Kerui refractory is the concentration of refractory industry in China. Kerui is deeply rooted in the high-temperature kiln industry, building its own R&D centre. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
Why Choose Us
Product application: Our main products include more than 200 varieties of organic pressed refractories, unshaped refractories, bricks for carbon roasting furnaces, functional refractories, etc. The products are used in high-temperature kilns and equipment in metallurgy, chemical industry, building materials, electricity, non-ferrous metals, carbon industry and other industries.
Product market: Our refractory products have been sold to Russia, South Korea, Ukraine, Brazil, Indonesia, Iran, Thailand and other countries.
Our production capacity: Our annual production capacity of shaped refractory products is 150,000 tons, and the capacity of unshaped refractory products is 100,000 tons.
Our services: In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.
Advantages of Alumina Insulation Brick
High insulation ability: The bubble spheres inside the alumina insulation bricks act as insulators. They can greatly reduce heat transfer. Due to their excellent insulation performance, they can help reduce energy loss and improve energy efficiency. Therefore, this feature helps to save costs for businesses.
Enhanced chemical stability: The alumina purity in alumina insulation bricks is over 99%. It exhibits stable chemical properties at high temperatures and remains structurally intact in acidic and alkaline environments. This helps extend the lifespan of the equipment.
Strong thermal shock resistance: Alumina insulation bricks have good resistance to thermal shock. In high-temperature environments, they can withstand rapid temperature changes without cracking or spalling. They can be used in extremely high-temperature industries such as steel and glass.
Low thermal conductivity: The low thermal conductivity of alumina insulation bricks is related to their insulation properties. The thermal conductivity ranges from 0.9-1.2w/(m·k). It is higher than mullite insulation fire brick‘s. Their low thermal conductivity reduces heat transfer losses.
Lightweight: They have a high porosity and low volume density. The volume of alumina bubbles ranges from 1.3-1.9g/cm3. The porous bubble structure results in a very light weight. They are easy to handle and transport.
Alumina Insulation Brick Specification
|
Index |
QN-0.6 |
QN-0.8 |
QN-1.0 |
|
Bulk & Density (g/cm3) ≥ |
0.6 |
0.8 |
1 |
|
Cold Crushing Strength (MPa) ≥ |
2 |
3 |
4 |
|
Heat Conductivity (900℃±25) (W/m·k) ≤ |
0.25 |
0.3 |
0.5 |
Features of Alumina Insulation Brick
Lightweight: The density of lightweight fireclay insulation bricks is 0.6 - 1g/cm³, which is 30% - 50% lighter than ordinary refractory bricks.
Excellent thermal insulation performance: The thermal conductivity of lightweight fireclay insulation bricks is ≤0.25w/m・k under the environment of 900℃±25. Low thermal conductivity means that heat is difficult to conduct through bricks, which can provide efficient thermal insulation effect for industrial kilns and other equipment and reduce heat loss.
High strength: The room temperature compressive strength of lightweight fireclay insulation bricks is ≥4mpa, and it is not easy to be damaged by external forces.
Application of Alumina Insulation Brick
Metallurgical industry
Lightweight fireclay insulation bricks are mainly used for the lining, furnace bottom, hot air duct and other parts of metallurgical equipment such as iron furnaces, steel furnaces, blast furnaces, ladles, converters, electric furnaces, etc.
Standardized Production
Chemical industry: Lightweight fireclay insulation bricks play a key role in thermal insulation in the lining, reactors, pipelines, heating furnaces and other parts of chemical equipment such as oil refining, fertilizers, and ethylene.
Electric power industry
Lightweight fireclay insulation bricks are used in high-temperature parts such as power station boilers, flues, desulfurization equipment, dust removal equipment, and burners.
Construction industry
In the construction industry, lightweight fireclay insulation bricks are often used in fire walls, fire doors, flues and other parts of buildings.
Production Process of Alumina Insulation Brick
The temperature of rare earth calcination is generally between 900℃ and 1200℃. The specific calcination temperature should be determined according to the physical and chemical properties of different rare earth elements and calcination requirements to ensure the calcination effect and quality of the material.
In the calcination process, it is also necessary to maintain a constant calcination temperature and uniform heat transfer. To avoid problems such as sintering or composition deviation of the material.
It is recommended to use a rotary kiln or push plate furnace for calcining. These furnaces have the characteristics of high temperature, high efficiency, and good controllability, which can meet the requirements of rare earth materials calcination.
Packing and Shipping of Alumina Insulation Brick
|
Packing |
In wooden pallets or crates |
|
Shipping |
Shipped by road, sea, rail |