Refractroy Mullite Insulation Fire Brick For Industrial Furnace Insulation

Overview of Mullite insulating bricks

Mullite insulating bricks are a type of high-alumina refractory material with mullite as the main crystal phase. They feature low thermal conductivity, low heat capacity, and high-temperature resistance, and are widely used as linings in industrial kilns.

Core definition and composition of mullite insulation bricks

Mullite insulation bricks are high-alumina refractory materials with mullite (3Al₂O₃·2SiO₂) as the main crystal phase. The alumina content is usually 65% to 75%, and a small amount of clay or raw kaolin is used as a binder 13. In addition to mullite, the mineral composition of these bricks also includes glass phase and quartz in low-alumina products, and a small amount of corundum in high-alumina products.

Classification and Key Parameters

By density: classified as lightweight (0.8/1.0/1.2 g/cm³), heavy-duty. The thermal conductivity of lightweight bricks ranges from 0.25 to 0.35 W/m·K (at 350℃), while heavy-duty bricks have higher compressive strength.
By operating temperature: divided into 1350℃, 1450℃, and above 1550℃. Models above 1550℃ are suitable for ultra-high temperature scenarios such as kilns.
By production process: classified as fired bricks and electrofused bricks. Electrofused bricks have larger crystals and superior thermal shock resistance compared to fired bricks.

 

Core characteristics of mullite insulation bricks

Heat insulation and energy saving: Low thermal conductivity and low heat melting, significant energy-saving effect in intermittent operation kilns.
High temperature stability: Fire resistance up to over 1790℃, softening point under load 1450-1700℃, resistant to chemical erosion.
Construction-friendly: Precise dimensions, can be processed into special shapes, reducing joint and refractory mortar usage.

Typical application scenarios of mullite insulation bricks

They can be directly used as the inner lining of high-temperature kilns, such as ceramic belt kilns, petrochemical cracking furnaces, glass melting kilns, and steel heat treatment furnaces, etc. .

Henan Lite Refractory Materials Co., Ltd. has served over 5,000 projects and has been dedicated to the production and research and development of refractory materials for 30 years. It possesses professional technology and a mature team. Its products have been exported to various markets around the world and it is a highly renowned enterprise. Moreover, it has overseas warehouses, which facilitate rapid delivery and ensure product reliability.

 

Display of mullite insulation bricks

 

1.Are we a manufacturer or supplier? We are a manufacturer. Our company was established in 1994 and has been dedicated to refractory materials for 30 years. Our customers are spread across 120+ countries, and we serve over 3,000+ global customers. We have four major production bases, with an area of over 50,000 square meters. Our annual production capacity is 150,000 tons, and we have a complete product line to ensure production capacity and delivery time.

2.Do you offer product customization? Support customization, with over 150 patents, capable of developing new products within 7 days for each model, and 300+ sets of molds available for free sample production.

3.How do you conduct quality testing on your products? We strictly follow the quality management system, and we have a logistics chemistry laboratory. Here are some of the ways we conduct quality testing: 1) Raw material inspection 2) In-process inspection 3) Finished product inspection 4) Performance testing 5) Stability testing 6) The product qualification rate of the factory is ≥ 99.5%, and a test report is provided for each batch of products.

4.What is your delivery time? Usually, the goods will be dispatched within 7 to 15 days after the deposit is received. For urgent orders, please contact us to obtain a faster solution. We can dispatch the goods within 72 hours.

5.Can you provide samples? Yes, free samples are available. Customers only need to cover the shipping cost.

6. How is the after-sales service of your company? Global after-sales support, 24-hour response, with 3 international engineering teams, supporting the implementation of global projects, with the fastest response time of 24 hours. 9S one-stop service system, integrated engineering services, providing full-process engineering solutions including design, production, construction, training, and after-sales, helping customers reduce costs and increase efficiency.

7.Why choose us over other suppliers? We have a large scale, strong strength, and rich experience, professional technology, and perfect customer service, and have obtained various certifications such as CE/ISO9001/ISO45001/CNAS/SGS.

8.What are your payment methods? A-We accept various payment methods, including credit cards, PayPal, bank transfer, and Western Union. The specific payment method can be negotiated.

 

 

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Mullite insulation bricks are high-alumina refractory materials with mullite (3Al₂O₃·2SiO₂) as the main crystal phase. The alumina content is usually 65% to 75%, and a small amount of clay or raw kaolin is used as a binder 13. In addition to mullite, the mineral composition of these bricks also includes glass phase and quartz in low-alumina products, and a small amount of corundum in high-alumina products.