2024-06-04 17:02:06
Low porosity refractory bricks are a typical type of clay refractory product, with a porosity of less than 18%. Common porosity rates include 16%, 12%, 15%, and 10%. The raw materials for this refractory brick mainly include pyroxene, sintered clay, etc., which are formed by high-pressure molding and high-temperature sintering. Its firing temperature is about 30 ℃ higher than traditional clay bricks. Low porosity refractory bricks have various advantages, including high strength, high fire resistance, dense structure, good thermal shock stability, anti peeling, strong corrosion resistance, strong penetration resistance, and good wear resistance. Therefore, low porosity refractory bricks are widely used in various high-temperature industrial kilns, such as hot air furnaces, glass kiln heat storage chambers, lime kiln high-temperature zone firing zones, etc. Specifically, low porosity fire-resistant bricks are mainly used for the middle and lower grid bodies, supporting arches, etc. of hot air furnaces, glass kilns, and heat storage chambers. In addition, low porosity refractory bricks also play an important role in the high-temperature firing zone of lime kilns, various kilns, industrial kiln linings, and thermal equipment. Due to its excellent corrosion resistance, especially alkali resistance, it is also widely used in specific environments such as lime kilns.
There are many types of low porosity fire-resistant bricks, which can be divided into multiple types based on the different raw materials and production processes. Here are some main types:
1. Low porosity clay refractory bricks: This type of refractory brick is mainly made of clay and is formed and fired at high temperature. They usually have high strength and refractory temperature, and can be used in high-temperature environments such as glass kilns. In addition, low porosity clay bricks also have good thermal conductivity and have little impact on heat exchange.
2. High alumina low porosity refractory bricks: This type of refractory brick is mainly composed of high alumina materials and has high fire resistance and corrosion resistance. They can maintain stability in high-temperature environments and are suitable for kilns that require high performance of refractory materials.
3. Siliceous low porosity refractory bricks: Siliceous low porosity refractory bricks are mainly made of siliceous materials and have high temperature resistance performance. They are usually used in industrial kilns that need to withstand high temperatures.
4. Mullite low porosity refractory bricks: Mullite low porosity refractory bricks are mainly composed of mullite and have good high temperature resistance and corrosion resistance. They can maintain stability in high temperature and corrosive environments and are suitable for special industrial kilns.
In addition, according to the different usage temperatures, low porosity refractory bricks can also be divided into low-temperature insulation materials, medium temperature insulation materials, and high-temperature insulation materials. Fixed lightweight refractory bricks include clay, high alumina, silica, and some pure oxide lightweight bricks, while amorphous lightweight refractory materials such as lightweight refractory concrete. Overall, low porosity refractory bricks are widely used in various industries such as steel smelting, cement, chemical industry, ceramics, casting, machinery, electricity, petroleum, and building materials. However, the specific usage environment and methods may vary depending on different industries and application scenarios, so in practical applications, it is necessary to choose and use according to the specific situation. Low porosity refractory bricks, as a type of refractory material, can meet the needs of various high-temperature industrial kilns for refractory materials.
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