Industry Knowledge of Low-Creep High-Alumina Refractory Brick

Low-creep high-alumina refractory brick is a type of high-performance refractory material with excellent thermal stability and resistance to thermal shock. It has become an essential material for high-temperature industrial furnaces, such as cement kilns, steelmaking furnaces, and glass melting furnaces. The product standard of low-creep high-alumina refractory brick is GB/T 2988-2023.

Classification:

Low-creep high-alumina refractory brick is classified into three grades based on its creep rate: Class A, Class B, and Class C. The creep rate is the primary technical parameter for evaluating the quality of the product. The smaller the creep rate, the better the product quality. In general, Class A low-creep high-alumina refractory brick has the smallest creep rate and the highest performance.

Technical Parameters:

In addition to the creep rate, low-creep high-alumina refractory brick has other technical parameters, such as bulk density, apparent porosity, cold crushing strength, and thermal conductivity. The technical parameters are closely related to the product's performance and application. For example, high bulk density and low apparent porosity are essential for improving the product's resistance to thermal shock.

Production Process:

The production process of low-creep high-alumina refractory brick includes raw material selection, preparation, molding, drying, firing, and inspection. The raw material for low-creep high-alumina refractory brick is usually high-alumina bauxite, which has a high alumina content and a low impurity content. The molding method can be dry pressing, semi-dry pressing, or extrusion. After molding, the product is dried and then fired in a high-temperature kiln. The firing temperature, holding time, and cooling rate are critical factors that affect the product quality. After firing, the product is inspected and tested to ensure that it meets the required technical parameters.

Conclusion:

Low-creep high-alumina refractory brick is a high-performance refractory material that plays an important role in high-temperature industrial furnaces. The product's classification, technical parameters, and production process are critical factors that affect its performance and quality. By using high-quality raw materials and advanced production technology, manufacturers can produce low-creep high-alumina refractory brick with high performance and reliability, which can meet the needs of various industrial applications.