Industry Knowledge of Corundum Refractory Castables

Corundum refractory castables are an important type of refractory materials used in high-temperature industries such as iron and steel, non-ferrous metals, glass and cement. These materials are made by mixing corundum as the main raw material with other additives, and then pouring the mixture into molds to form solid shapes when cured.

Corundum refractory castables are classified into different grades based on their chemical composition, density, and thermal properties. The refractory industry classifies them as either low cement, ultra-low cement, or no-cement castables. These castables possess a high thermal conductivity, high-temperature resistance, and high refractoriness, making them ideal for high-temperature applications.

The technical parameters of corundum refractory castables include compressive strength, flexural strength, and thermal shock resistance. These parameters are dependent on the corundum content, particle size distribution, and sintering temperature. The performance of corundum refractory castables can also be optimized by incorporating other refractory materials such as aluminum oxide, silicon carbide, and magnesium oxide.

The production process of corundum refractory castables involves several steps, including raw material preparation, mixing, shaping, curing, and firing. In the first step, the raw materials are crushed, milled, and sieved to the desired particle size. Next, they are mixed with water, binders, and other additives to form a slurry. The slurry is then poured into molds to create the desired shape. The molds are then placed in ovens for curing and firing.

In conclusion, the use of corundum refractory castables is essential for various high-temperature applications in industries such as iron and steel, non-ferrous metals, glass, and cement. These castables come in different grades that have varying technical parameters and are produced through a multi-step process. With their exceptional performance in high-temperature environments, corundum refractory castables will continue to play a major role in the development of high-temperature industries.