Industry Knowledge of Mullite Refractory Brick

Mullite refractory brick, also known as mullite brick or fused mullite brick, is a common refractory material in the industry. The material is made from high-quality bauxite and alumina as raw materials through high-temperature calcination and molding. Mullite refractory bricks have excellent fire resistance, high refractoriness, and good mechanical properties, making them widely used in high-temperature kilns and furnaces.

Mullite refractory bricks can be classified into different grades based on their properties. The classification is based on the Al2O3 content, apparent porosity, compressive strength, and thermal shock resistance of the bricks. The higher the Al2O3 content, the better the fire resistance of the brick. Different grades of mullite refractory bricks have different capabilities depending on their applications.

The technical parameters of mullite refractory bricks include dense refractory bricks and corundum mullite refractory bricks. They have different raw material ratios, different molding methods, and different firing temperatures. Dense refractory bricks usually have higher thermal conductivity, lower thermal expansion, and higher modulus of elasticity, making them suitable for blast furnace linings. Corundum mullite refractory bricks have higher thermal shock resistance, high-temperature strength, and thermal conductivity, making them ideal for high-temperature kilns and furnaces.

The production process of mullite refractory bricks involves several steps. The raw materials are selected and mixed according to the required proportions. The mixture is then molded into the desired shape and dried in a dryer. The dried brick is then fired in a kiln at a high temperature of over 1700°C, resulting in a dense, uniform structure and excellent mechanical properties.

In conclusion, mullite refractory bricks are an important material in the industry due to their excellent fire resistance, high refractoriness, and good mechanical properties. The brick is classified based on its properties, and its technical parameters depend on its raw materials, molding method, and firing temperature. The production process involves several steps to ensure a dense, uniform structure. Mullite refractory brick manufacturers continue to improve their products to meet the high demand from various industries.