Industry Knowledge of High Alumina Bricks

High alumina bricks are commonly used refractory materials with excellent thermal stability, slag resistance, and corrosion resistance. According to the GB/T 2988-2012 standard, high alumina bricks can be classified into three categories based on their alumina content: general high alumina bricks (alumina content ≥ 50%), high-grade high alumina bricks (alumina content ≥ 75%), and super high alumina bricks (alumina content ≥ 90%).

General high alumina bricks are mainly used in low-temperature kilns, such as blast furnaces, hot blast furnaces, and electric furnaces. High-grade high alumina bricks are suitable for high-temperature kilns, such as cement rotary kilns and glass melting furnaces. Super high alumina bricks are used in ultra-high temperature kilns, such as steel ladle linings and RH vacuum degassing devices.

In addition to the classification based on alumina content, high alumina bricks can also be divided into different grades based on their physicochemical properties. The grade of high alumina bricks is determined by factors such as apparent porosity, compressive strength, thermal shock resistance, and creep rate. The higher the grade is, the better the quality of the bricks is.

High alumina bricks are widely used in various industries, such as steelmaking, cement production, and glass manufacturing. They play a vital role in ensuring the stable operation of industrial furnaces and reducing energy consumption. With the continuous development of science and technology, the performance of high alumina bricks is constantly improving. High alumina bricks with high strength, high density, and low thermal conductivity are gradually becoming the mainstream products in the refractory industry.

In conclusion, high alumina bricks are essential refractory materials with outstanding properties and various applications. We should keep exploring and improving the technical level of high alumina bricks to meet the needs of the industry's sustainable development.