Industry Knowledge of High Purity Corundum Based Low Cement Refractory Castable

High purity corundum based low cement refractory castable is a type of refractory material used in furnace and kiln linings. It is made of high-purity corundum as the main raw material, combined with fine powder, pure calcium aluminate cement, and micro powder to form a well-mixed castable.

This type of refractory castable is widely used in the steel, cement, nonferrous metals, petrochemical, and other industries due to its excellent high temperature resistance, slag resistance, and erosion resistance. It can withstand temperatures of up to 1800°C and has a long service life.

There are different classifications of high purity corundum based low cement refractory castables based on the chemical composition, installation method, and service temperature. The most commonly used classification is based on the alumina content, which ranges from 90% to 99%. The higher the alumina content, the better the high temperature performance of the castable.

The technical parameters of high purity corundum based low cement refractory castable include bulk density, apparent porosity, compressive strength, and thermal shock resistance. The bulk density ranges from 2.5g/cm3 to 2.9g/cm3, the apparent porosity is less than 18%, the compressive strength is greater than 90MPa, and the thermal shock resistance is better than 20 times.

The production process of high purity corundum based low cement refractory castable mainly consists of raw material selection, mixing, molding, drying, and firing. The raw materials are carefully selected to ensure high purity and consistency. The materials are then mixed in a specific proportion using a mixing machine. The mixture is then molded into the desired shape and size and left to dry for a certain period of time. Finally, the castables are fired at high temperatures to achieve the desired properties.

Overall, the use of high purity corundum based low cement refractory castable has greatly improved the performance and efficiency of high-temperature industrial equipment. The continuous improvement of the production process and technical parameters has broadened the application range of this type of refractory castable and contributed to the development of the industry.