Industry Knowledge of Corundum Mullite Refractory Brick

Corundum mullite refractory brick is a high-grade refractory material that is widely used in industrial furnaces, such as metallurgical furnaces and ceramic kilns. This type of refractory brick is made of corundum and mullite as the main raw materials, and is produced through a strict process of mixing, molding, drying, and high-temperature firing.

There are different grades of corundum mullite refractory bricks, which are differentiated based on their chemical composition, performance, and application. The classification includes standard type, low-creep type, high-strength type, low-thermal conductivity type, and wear-resistant type. Each type has unique technical parameters, such as high-temperature resistance, thermal shock resistance, and erosion resistance.

The technical parameters of corundum mullite refractory brick also vary depending on the production process and the ratio of raw materials used. Generally, the corundum and mullite content should be above 70%, and the porosity should be less than 20%. The compressive strength should be above 80MPa, and the thermal conductivity should be less than 2 W/m-K.

The production process of corundum mullite refractory brick involves several steps, including crushing, screening, mixing, molding, drying, and firing. The raw materials are crushed into fine particles and then mixed with water and other additives to form a mud-like material. The material is then molded into the desired shape and size, and then dried at a controlled temperature. Finally, the dry bricks are fired at high temperatures to achieve the required physical and chemical properties.

In recent years, the demand for corundum mullite refractory brick has been increasing, due to its superior performance and durability. With the development of new production technologies and materials, the quality of corundum mullite refractory brick is constantly improving, making it an essential material for various high-temperature applications.