Industry Knowledge of Dense Fireclay Refractory Brick

Dense fireclay refractory brick is a type of refractory material with excellent high-temperature resistance, which is widely used in metallurgical, chemical, and building industries.

According to GB/T 34188-2017 standard, dense fireclay refractory brick can be classified into two grades: Grade I and Grade II. Grade I brick has a bulk density of ≥2.3 g/cm³, a cold crushing strength of ≥50 MPa, and a refractoriness of ≥1710°C. Grade II brick has a bulk density of ≥2.2 g/cm³, a cold crushing strength of ≥40 MPa, and a refractoriness of ≥1690°C.

The technical parameters of dense fireclay refractory brick also play an important role in its application. The porosity of the brick should be ≤18%, and the thermal shock resistance should be good. The thermal conductivity of the brick should be ≤2.5 W/(m·K) at 1000°C, and the linear change rate should be ≤0.6% after heating at 1450°C for 2 hours.

The production process of dense fireclay refractory brick is complex and requires strict quality control. The main raw materials include high-quality clay and refractory clay. The materials are mixed, molded, and fired at high temperatures (1200-1450°C) in a kiln. The brick's surface can be glazed or sprayed with a protective coating to improve its performance.

In conclusion, dense fireclay refractory brick is an essential industrial material with high-temperature resistance and excellent mechanical properties. Its classification, technical parameters, and production process are crucial for ensuring its quality and performance in various applications. With the wide application and continuous innovation in the industry, we believe that dense fireclay refractory brick will have a promising future.