Industry Knowledge of Corundum-Mullite Refractory Castables

Corundum-mullite refractory castables refer to a type of high-quality refractory material used in various industrial furnaces. This material is composed of corundum and mullite as the main raw materials, accompanied by various auxiliary materials and additives. It has excellent thermal stability, chemical corrosion resistance, and good mechanical properties.

The corundum-mullite refractory castables can be classified into different grades based on their technical parameters. These grades differ in terms of their raw materials, particle size distribution, chemical composition, bulk density, porosity, thermal shock resistance, and other physical properties. The common grades include low cement castables (LCC), ultra-low cement castables (ULCC), self-flowing castables (SFC), and vibration casting castables (VCC), among others.

The technical parameters of the corundum-mullite refractory castables are also related to their production process. Generally, the production process involves four major steps: raw material selection, mixing, forming, and heat treatment. The raw materials are carefully selected and mixed according to the specific grade requirements. Then, the mixture is shaped into the desired shape, such as bricks, blocks, or monolithic structures, using different methods such as vibration casting, ramming, or hand molding. Finally, the shaped castables are fired at high temperatures to achieve the desired physical and chemical properties.

In recent years, corundum-mullite refractory castables have gained widespread use in various industries, such as steelmaking, ceramics, cement, aluminum, and petrochemicals. They are mainly used as lining materials for high-temperature furnaces, such as ladles, converters, kilns, and reactors. As the demand for high-quality refractory materials increases, the corundum-mullite refractory castables will continue to play a crucial role in industrial processes.

To sum up, the corundum-mullite refractory castables are a valuable asset in the industrial field. They exhibit excellent properties, such as high thermal stability, corrosion resistance, and mechanical strength, which make them ideal for use as lining materials in high-temperature furnaces. With the advancement of production technology and the development of new grades, this material will continue to meet the demands of various industries and contribute to their growth and prosperity.