Refractory
High Alumina Brick
High Alumina Brick
High alumina brick is an excellent refractory material, which has many benefits. It is highly resistant to extreme temperatures and can store large amounts of heat. Its high alumina content can also be used for a variety of applications in the chemical, pharmaceutical, and energy industries. High alumina bricks have the potential to be used in a variety of applications, such as in furnaces. The high alumina content of the brick helps it achieve high thermal efficiency and good compressive strength.
The process of casting the lightweight alumina brick begins by preparing the mold. Then, a combustible material is mixed with the mud. These materials include sawdust, rice husk, coke powder, and anthracite. Combustible additives should be ash free and have low levels of harmful impurities. Then, the mixture is milled in a wet mill for four to five minutes. The resulting brick is then extruded into a mud strip by a screw extruder.
High alumina brick is a highly-preferred material for industrial furnaces. Its durability and low-emissivity make it a perfect choice for such applications. Its high al2o3 content is excellent for processes that involve acids and abrasive substances. It is also highly-regarded in the refractory industry. It is also more energy-efficient than conventional brick. You'll be glad to know that a high-alumina brick can be used in industrial furnaces.
High alumina bricks are typically made from bauxite or diaspore clay. The high-alumina bricks are then classified according to their alumina content. There are three different types of high alumina brick: 50% Al2 03, 60% Al2 03, and seventy percent Al2O3.
High alumina bricks are a highly versatile material. They have excellent heat resistance and wear resistance, are resistant to washing and acid solutions, and have good thermal stability. High alumina bricks are widely used in industrial blast furnaces and have a wide range of applications in metallurgy, mining, and glass making. Aside from glass and cement rotary furnaces, they are also used for soaking pits and electric arc furnace roofs.
The refractory properties of high alumina bricks are dependent on the chromium content of the raw materials used in making them. In high-alumina bricks, chromium sesquioxide accounts for about 80% of the batch, and the remaining 10% is finely divided alumina (preferably 325 mesh or greater).
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