Mullite Insulating Fire Brick

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The raw material is crude highquality highalumin low ferrous content material. The unique polylight spheres producing technique is adopted. The main structure of this high-quality heat insulation refractory brick is mullite crystal phase. The characteristics of this product are:

High compression strength

Good high-temperature performance

Excellent thermal shock stability

Low thermal conductivity

Outstanding penetration resistance ability

Erosion resistance

Application:

It may be widely used as the lining and the heat insulation layer of industrial kilns in the fields of metallurgy, petrochemistry, machinery, power, ceramics, etc... It is an ideal product of long service life, energy-saving and effects-enhancing product.

Brand Item	JM-23	JM-26	JM-28	JM-30
Al2O3(%)min	37	50	60	68
Fe2O3(%)max	1.0	1.0	0.7	0.5
SiO2(%)max	45	43	36	29
Safty Application Temp.(°C)max	1260	1430	1540	1650
Bulk Density(g/cm3)	0.5	0.8	0.95	1.05
Bending strength(Mpa)min	0.7	1.1	1.6	2.0
Crush strength(Mpa)min	1.0	2.0	2.3	2.7
RLC(%)max	1230°C×24h 0.3	1400°C×24h 0.4	1510°C×24h 0.5	1600°C×24h 0.6
Reversible thermal expansion at1090°C(%) max	0.5	0.6	0.8	0.8
Thermal conductivity (w/m.k)max 400°C 600°C 800°C 1000°C	0.15 0.17 0.19 0.24	0.28 0.31 0.33 0.35	0.33 0.36 0.39 0.42	0.41 0.43 0.45 0.48

Q: How do insulating fire bricks affect the overall fire safety of a structure?: The overall fire safety of a structure is greatly improved by the use of insulating fire bricks. These bricks are specifically designed to withstand high temperatures and provide excellent insulation, making them ideal for applications that require heat containment. By effectively insulating the structure, these bricks help minimize the spread of fire and heat transfer. Their low thermal conductivity slows down the rate at which heat is conducted through the walls, ceiling, and floors of a building. This is crucial in preventing the fire from spreading to adjacent areas or neighboring structures. In addition, insulating fire bricks act as a barrier to the penetration of flames and hot gases, further contributing to the fire safety of a structure. Their ability to withstand high temperatures without compromising their structural integrity effectively contains the fire within a confined area. This containment provides valuable time for evacuation or firefighting efforts. Furthermore, insulating fire bricks are known for their excellent fire resistance properties. They are manufactured using refractory materials that can withstand extremely high temperatures without melting or disintegrating. This resistance to heat ensures that the bricks maintain their structural integrity even under intense fire conditions, providing a reliable fire protection barrier. Apart from their fire resistance properties, insulating fire bricks also possess excellent insulation capabilities. They have low thermal conductivity, meaning they are highly effective in preventing heat transfer. By reducing the rate of heat transfer, these bricks help maintain a cooler temperature on the non-fire side. This is particularly beneficial for structures that require temperature control, such as industrial furnaces or kilns. In summary, insulating fire bricks significantly enhance the fire safety of a structure by minimizing the spread of fire, acting as a barrier to flames and hot gases, and withstanding high temperatures without compromising their integrity. Their insulation properties also contribute to maintaining a cooler environment on the non-fire side. Therefore, incorporating insulating fire bricks into the construction of a building greatly improves its ability to withstand and contain fires, ultimately ensuring the safety of occupants and reducing property damage.

Q: Can insulating fire bricks be used as a backup insulation in refractory linings?: Insulating fire bricks have the capability to serve as backup insulation in refractory linings. These bricks are specifically designed with low thermal conductivity, enabling them to effectively minimize heat transfer in high-temperature scenarios. Due to their insulating properties, they are an excellent choice for a secondary insulation layer in refractory linings. This not only aids in reducing heat loss but also enhances overall energy efficiency. Another advantage is their lightweight nature, which simplifies handling and installation compared to alternative refractory materials. Nonetheless, it is crucial to carefully evaluate the application's specific needs and consult with a refractory engineer to confirm the suitability of insulating fire bricks for the particular conditions and performance requirements of the refractory lining.

Q: Are insulating fire bricks suitable for insulation in steam boilers?: Insulating fire bricks, which are made from lightweight materials such as alumina or silica, are highly suitable for providing insulation in steam boilers. These bricks possess exceptional insulating properties and can endure high temperatures and thermal shocks, making them an ideal choice for use in steam boilers subjected to constant heat exposure. The low thermal conductivity of insulating fire bricks effectively hinders heat transfer, resulting in reduced energy loss and enhanced efficiency of steam boilers. Additionally, their superior insulation capabilities assist in maintaining consistent temperatures within the boiler, preventing fluctuations in heat and minimizing the risk of thermal stress and damage. Moreover, insulating fire bricks exhibit resistance against corrosion and chemical attacks, ensuring their longevity and durability when employed in steam boiler applications. Furthermore, they can be effortlessly installed and cut into various shapes and sizes to perfectly fit the specific requirements of the boiler. In conclusion, insulating fire bricks are an exceptional option for insulation in steam boilers due to their ability to withstand high temperatures, low thermal conductivity, and resistance to corrosion. Their utilization aids in reducing energy loss, improving efficiency, and guaranteeing the long lifespan of the boiler.

Q: Are insulating fire bricks resistant to carbon dioxide?: Insulating fire bricks, also known as refractory bricks, are designed to withstand high temperatures and are generally resistant to various chemicals and gases. However, their resistance to carbon dioxide may vary depending on the specific type and composition of the insulating fire brick. Carbon dioxide (CO2) is a non-flammable gas that is usually present in the atmosphere and is released during the combustion of carbon-based fuels. In most cases, insulating fire bricks have a high resistance to carbon dioxide due to their high melting point and the presence of refractory materials such as alumina and silica. However, prolonged exposure to high concentrations of carbon dioxide, especially at elevated temperatures, can cause some insulating fire bricks to undergo chemical reactions that may lead to degradation or reduced performance. It is important to consider the specific application and environment in which the insulating fire bricks will be used. If the insulating fire bricks are part of a furnace or kiln that generates significant amounts of carbon dioxide, it is advisable to choose bricks specifically designed for such conditions. These bricks may have additional protective coatings or higher chemical resistance to ensure their longevity and performance. In summary, while insulating fire bricks generally have good resistance to carbon dioxide, it is important to consider the specific type of brick and the conditions under which it will be used to ensure optimal performance and longevity.

Q: Can insulating fire bricks be used in applications involving molten metal?: Yes, insulating fire bricks can be used in applications involving molten metal. Insulating fire bricks have high heat resistance and low thermal conductivity, making them suitable for withstanding the extreme temperatures generated by molten metal. They can be used in applications such as furnaces, kilns, and foundries, providing insulation and protection against heat transfer.

Q: The insulation layer destroyed after use of cement paste and tiling: Put on the insulating layer and paste it with cement.Some students worry about the insulation layer and the wall adhesive strength is not enough, do not worry about, now developers are building exterior insulation and then on top of the tiling. Because after finishing the insulation layer, the contractor should check the construction to do a pullout test, the purpose is to prevent the strength can not meet the requirements.

Q: Can insulating fire bricks be used in the construction of ceramic fiber kilns?: Yes, insulating fire bricks can be used in the construction of ceramic fiber kilns. Insulating fire bricks are designed to provide thermal insulation and reduce heat loss in high-temperature applications. They have excellent insulating properties, with low thermal conductivity, which makes them ideal for use in kilns where high temperatures need to be maintained. By using insulating fire bricks in the construction of ceramic fiber kilns, it is possible to enhance the overall energy efficiency of the kiln and improve its performance. However, it is important to ensure that the insulating fire bricks are compatible with the specific requirements and operating conditions of the ceramic fiber kiln to ensure optimal results.

Q: Are insulating fire bricks suitable for the insulation of chimneys?: Insulating fire bricks are indeed suitable for chimney insulation. Specifically engineered to endure high temperatures and deliver efficient insulation, these bricks are perfect for chimney applications. With their elevated thermal conductivity, they retain heat effectively, thereby enhancing the chimney's efficiency by preventing heat from escaping. Moreover, insulating fire bricks possess resistance to thermal shock, enabling them to endure abrupt temperature fluctuations without experiencing cracks or breakage. This resilience is particularly vital in chimneys, where the temperature can vary significantly during the combustion process. All in all, insulating fire bricks are a dependable option for chimney insulation due to their remarkable heat retention capabilities and durability.

Q: How much is a thermal brick?: Insulation brick prices also have a great relationship with the material and workmanship, such as clay brick price is much lower than high alumina brick, mullite and corundum brick prices will be higher.

Q: Can insulating fire bricks be used in the construction of heat recovery systems?: Insulating fire bricks are a viable option for heat recovery system construction. These bricks are specifically designed to endure high temperatures and deliver exceptional thermal insulation, making them an excellent choice for heat recovery systems. They are crafted from lightweight materials, such as ceramic fibers or refractory materials, which possess low thermal conductivity. This feature enables them to effectively capture and retain heat, preventing its escape from the system and maximizing energy efficiency. Moreover, insulating fire bricks exhibit resistance to thermal shock, meaning they can withstand sudden temperature fluctuations without undergoing cracks or breakage. Consequently, they are well-suited for the fluctuating heat conditions commonly encountered in heat recovery systems. Ultimately, incorporating insulating fire bricks into the construction of heat recovery systems can enhance their performance and efficiency by reducing heat loss and optimizing energy recovery.

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