Industry Knowledge of Andalusite Refractory Brick

Andalusite refractory brick is a type of high-quality refractory material with excellent thermal shock resistance, chemical resistance, and mechanical strength. It is widely used in various high-temperature industrial applications, such as metallurgy, cement, glass, and ceramics.

Andalusite refractory brick can be divided into three grades based on its Al2O3 content, namely, low-grade (49-60%), middle-grade (60-70%), and high-grade (≥70%). The higher the grade, the better the performance of the brick.

Andalusite refractory brick has excellent properties such as good thermal stability, high refractoriness, low porosity, and good thermal conductivity. Its thermal conductivity is 15-25% higher than that of other refractory materials. Its thermal expansion coefficient is low, and its thermal shock resistance is excellent. The middle-grade and high-grade products have a compressive strength of 100-200 MPa, while the low-grade products have a compressive strength of 70-100 MPa. It is also resistant to acid and alkali corrosion and has a long service life.

The production process of andalusite refractory brick involves several steps. Firstly, the raw materials are selected, crushed, and ground to form a powder. Then, the powder is mixed with a binder and then molded into the desired shape and size. After that, the product is dried and fired at high temperatures to form a dense and strong brick.

In conclusion, the andalusite refractory brick is a vital material in the industrial field, and its excellent properties make it an ideal product for high-temperature applications. The grading system, technical parameters, and production process mentioned above are essential factors for its effective use.