High Alumina Bricks: Foundation of Heat-Resistant Structures

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High-Alumina Refractory Bricks

High-alumina refractory bricks are a type of refractory material known for their high alumina content, typically composed of alumina (Al2O3) at a level of 48% to 95%. These bricks exhibit excellent refractoriness, which means they can withstand high temperatures without undergoing significant deformation or damage.

square solid high alumina bricks

Features of High-Alumina Refractory Bricks

  • Composition: The primary component of high-alumina bricks is alumina (Al2O3), which imparts high heat resistance. Other additives may be included to enhance specific properties.
  • Classification: High-alumina refractory bricks are classified into different grades based on their alumina content. Common classifications include 48%, 60%, 75%, 80%, and 95% alumina bricks.
  • High Temperature Resistance: These bricks can withstand high temperatures and are commonly used in applications where temperatures range from 1400°C to 1800°C. This makes them suitable for use in industries such as steel, cement, glass, and non-ferrous metals.
  • Chemical Stability: High-alumina bricks have good chemical stability, resisting the corrosive effects of acids and alkalis. This property makes them suitable for use in environments with chemical exposure.
  • Applications: They are widely used in various industrial applications, including the construction of furnaces, kilns, and other high-temperature processing equipment. They are also used in the lining of steelmaking and glassmaking furnaces.
  • Varieties: There are different types of high-alumina refractory bricks, including fireclay high-alumina bricks, mullite high-alumina bricks, corundum high-alumina bricks, and spinel high-alumina bricks. Each type has specific properties that make it suitable for particular applications.
  • High Strength: High-alumina bricks often possess good mechanical strength and resistance to abrasion, which is important for their use in harsh industrial environments.
  • Insulating Properties: While not as insulating as some other refractory materials like insulating firebricks, high-alumina bricks still offer some level of insulation due to their low thermal conductivity.
  • Manufacturing Process: The manufacturing process involves shaping the raw materials into bricks and then firing them at high temperatures to achieve the desired properties.
  • Alumina-Silica Ratio: The ratio of alumina to silica in these bricks influences their performance. A higher alumina content generally results in better high-temperature properties.

High-alumina refractory bricks play a crucial role in industries where materials are subjected to extreme temperatures, providing durability and stability in demanding conditions.

high alumina anchor bricks

High-Alumina Anchor Bricks

High-alumina anchor bricks, also known as hanging bricks, are refractory bricks used in heating furnaces. They are primarily used to connect and support the structure of refractory bricks and ordinary sintered bricks, particularly in the roof and walls of heating furnaces or other locations.

High-alumina anchor bricks are a special type of refractory brick, with the main component being high-alumina alumino-silicate. These bricks exhibit excellent refractory and corrosion-resistant properties, making them widely applicable in specific high-temperature industrial environments.

In the manufacturing process of these bricks, high-alumina alumino-silicate is used as the main raw material and is formed through high-temperature sintering. High-alumina anchor bricks typically have a rectangular or other regular shape with a smooth surface and sturdy texture. Their unique anchor design allows for better nesting within other refractory materials, creating a more robust structure. This anchoring structure contributes to the overall stability and durability of the entire refractory body.

High-alumina anchor bricks use natural high-grade bauxite as the main refractory material. The formulation begins by adding soft or semi-soft clay as a binder in high-alumina clinker. The mixture is then shaped, dried, and finally fired to produce the high-alumina refractory brick. Generally, the aluminum oxide content in high-alumina anchor bricks is above 55%. These bricks can be customized according to customer requirements. The load softening temperature of high-alumina anchor bricks reaches 1550°C, meeting the performance requirements for the lining of furnace roofs.

High-alumina anchor bricks are a shaped high-alumina refractory bricks consisting of hanging end heads and anchor bodies forming a column. Intermittent grooves are provided on the surface of the anchor body, and reinforcing bars are set along the length direction on at least one surface of the anchor body. Due to the reinforcement and tensile effects of the bars, the tensile and flexural strength of the anchor body are significantly improved. The stress generated at the grooves is blocked at the reinforcing bars, preventing it from continuing to transmit, making high-alumina anchor bricks less prone to fracture.

Overall, high-alumina anchor bricks are a refractory material that performs well in extremely high-temperature and corrosive environments, playing a crucial role in maintaining structural stability and durability.

Overall, high-alumina anchor bricks are a refractory that performs well in extreme heat and corrosive environments, and it plays an important role in maintaining structural stability and durability.

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