Classification Dimension Main Type Key Features
Material Composition Clay brick (Al₂O₃ 30%-48%) High cost performance, most widely used
High-alumina brick (Al₂O₃>60%) High temperature resistance, strong corrosion resistance
Silica brick (SiO₂ ≥93%) Strong acid resistance, used for the top of high-temperature kilns
Magnesia brick (mainly MgO) Strong alkali resistance, used in steelmaking converters, etc.
Corundum brick (Al₂O₃ ≥90%) High high-temperature strength, used in ultra-high temperature equipment
Preparation Process Fired brick Sintered at high temperature (1300-1800℃), high strength and good stability
Unfired brick Chemically bonded and formed without high-temperature sintering
Fused cast brick Molded by casting after melting, high purity and dense structure
Insulating brick Lightweight and porous, low thermal conductivity (0.2-0.8W/m·K) Shape and Size Standard type (230×114×65mm) Universal specification, high masonry efficiency
Special-shaped brick Suitable for complex structures, such as arch bricks, wedge bricks
Special type brick Customized shape, used in key parts
