Industry Knowledge of Cyanite Refractory Brick

Cyanite refractory brick, also known as blue crystal refractory brick, is an important material widely used in high-temperature industrial applications. It is a type of refractory product made from cyanite as the main raw material along with other additives.

According to its classification, cyanite refractory bricks are divided into three grades: high-grade, middle-grade, and low-grade. High-grade cyanite refractory brick has a high alumina content, high thermal conductivity, and good thermal shock resistance. It is suitable for use in high-temperature furnaces such as metallurgy, ceramics, and glass. Middle-grade cyanite refractory brick has good thermal stability and is suitable for use in casting equipment, and low-grade cyanite refractory brick is widely used in various kinds of heating furnace.

In terms of its technical parameters, cyanite refractory brick has excellent properties, including high-temperature resistance, corrosion resistance, erosion resistance, and excellent thermal shock resistance, which can effectively protect the lining of high-temperature furnaces from damage. The compressive strength of cyanite refractory brick is generally between 50 and 100 MPa, and its thermal conductivity is as low as 2.5 W/mK, which can effectively reduce heat loss during high-temperature operation.

As for its production process, cyanite refractory brick is manufactured through a sintering process. The raw materials are crushed, mixed, and then molded into a variety of shapes, such as bricks, plates, and cylinders. The products are then subjected to high-temperature firing at a temperature of 1700℃ for 4 to 5 hours, making them resistant to high temperatures.

In conclusion, cyanite refractory brick is an essential material in high-temperature industrial applications. Its different grades, technical parameters, and production processes make it suitable for various applications. With its excellent properties and widespread use, the cyanite refractory brick industry is expected to continue thriving in the future.