Today, we are going to discuss a material that is crucial for industrial kilns - mullite poly lightweight insulation bricks. In a kiln with a temperature of up to 1300°C, this kind of brick is in direct contact with the flame, but it can stably play its dual role of fire resistance and heat preservation. Next, let us enter the world of mullite poly-light insulation bricks and understand their unique charm.
PART 01
Introduction to mullite insulation bricks
Mullite insulation bricks are high-aluminum refractory materials with mullite (Al2O3·2SiO2) as the main crystal phase. Generally, the alumina content is between 50% and 60%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite in those with lower alumina content; a small amount of corundum in those with higher alumina content. The refractoriness is relatively high, reaching over 1790℃.
PART 02
Performance characteristics of lightweight mullite insulation bricks
First of all, lightweight mullite insulation bricks show their significant lightweight characteristics due to their light body. Its density is usually in the range of 0.6-1.2g/cm³. Compared with traditional materials, it has a lower weight, which not only makes the handling and installation process more convenient, but also reduces the burden on the equipment itself, improving improve the stability of the overall structure.
Secondly, lightweight mullite insulation bricks have excellent performance in thermal insulation. Its thermal conductivity is usually controlled within the range of 0.2-0.4W/(m·K), which means that it can effectively block the transfer of heat and maintain the stability of the internal temperature of the device. Whether used in hot blast stoves, ceramic kilns or other high-temperature equipment, it can exert excellent thermal insulation effects, thereby improving the operating efficiency of the equipment.
Furthermore, the fire resistance of lightweight mullite insulation bricks cannot be underestimated. Although its density is low, it can still withstand high temperature erosion, and its fire resistance temperature can reach more than 1300°C. This feature allows it to maintain stable performance in various high-temperature environments, providing a solid guarantee for the long-term stable operation of the equipment.
Finally, lightweight mullite insulation bricks also have good corrosion resistance. It can resist various chemical erosion environments and maintain a long service life. Whether it is acid, alkali or other corrosive media, it can demonstrate excellent resistance and ensure the stable operation of the equipment in various complex environments.
In addition, mullite poly light insulation bricks also have the characteristics of lightweight insulation. Compared with traditional heavy refractory bricks, mullite poly-light insulation bricks are lighter and easier to construct and install. At the same time, its thermal conductivity is low and thermal resistance is large, which can effectively reduce heat loss and energy consumption. In practical applications, kilns using mullite polylight insulation bricks can usually achieve the dual effects of saving energy, reducing consumption, and improving production efficiency. Mullite polylight insulation bricks also have good chemical stability. In high temperature environments, it can resist various acid and alkali erosion and oxidation reactions and maintain stable physical properties. This gives the mullite polylight insulation bricks a longer service life, reduces the frequency of replacement and repair, and reduces the company's operating costs.
PART 03
Classification of mullite insulation bricks
Mullite insulation bricks are mainly divided into two categories: lightweight mullite bricks and heavy mullite bricks. According to the temperature difference they withstand, these bricks can be subdivided into JM23 mullite insulation bricks, JM26 mullite insulation bricks, JM28 mullite bricks and other products.
Among these bricks, the names of lightweight mullite insulation bricks such as JM23, JM26, and JM28 actually contain information about their fire resistance levels. The "JM" serial number here is an intuitive identification of their fire resistance. These numbers not only help professionals quickly identify the grade of bricks, but also provide users with a clear basis for purchase.
It is worth mentioning that the alumina content of lightweight mullite insulation bricks is an important measure of their quality. Taking Jm23, Jm26, Jm28, and Jm30 as examples, their alumina contents are in the range of 38-44%, 50-58%, 65-70%, and 70-73% respectively. As the alumina content increases, the insulation performance and fire resistance of the bricks will also increase accordingly, which means that higher-grade bricks have better stability and durability in high-temperature environments.
So, what is the fire resistance temperature of these bricks? Lightweight mullite insulation bricks such as JM23, JM26, JM28, JM30, and JM32 correspond to fire-resistant temperatures of 1250°C, 1350°C, 1450°C, 1550°C, and 1650°C respectively. These data not only demonstrate the excellent performance of mullite insulation bricks, but also provide a solid guarantee for their application in various high-temperature environments.
As a high-quality refractory material, mullite insulation bricks are widely used in the hot surface refractory lining or insulation layer of various thermal equipment. Whether in the production process of ceramics, glass and other materials, or in heat treatment equipment in metallurgy, chemical industry and other fields, we can find mullite insulation bricks. With their excellent fire resistance and thermal insulation effect, they provide important support and guarantee for industrial production.
PART 04
Application fields of lightweight mullite insulation bricks
Mullite insulation brick, as an excellent refractory material, its wide applicability has been fully verified in various high-temperature industrial equipment. First of all, it shows excellent heat resistance and stability as a lining material in high-temperature reaction equipment such as cracking furnaces and hot blast furnaces. Especially in ceramic roller kilns, electric porcelain drawer kilns and glass crucibles, mullite insulation bricks ensure uniform sintering and efficient production of products with their excellent insulation properties.
In more complex equipment such as blast furnaces and glass furnace regenerators, mullite insulation bricks also play a pivotal role. Whether it is on the furnace top, furnace body or furnace bottom, it can effectively resist high temperature corrosion and protect equipment from damage. For the furnace lining of the petroleum cracking system, mullite insulation bricks are indispensable, which ensures the efficient operation and long-term use of the system.
In addition, mullite insulation bricks also have excellent performance in various occasions such as smelting furnaces, firing kilns, flues, refining equipment, and heating equipment. It not only provides stable thermal insulation effect, but also improves the overall operating efficiency of the equipment. In regeneration equipment, gas generators and pipelines, mullite insulation bricks also show their strong adaptability, ensuring the stable operation of equipment in high-temperature environments.
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