Clay Brick

Clay refractory brick is divided into ordinary clay brick, dense clay brick, low creep clay brick and heat shock resistant clay brick four categories. Ordinary clay bricks are fired ordinary clay products with hard clay clinker as the main raw material, dense clay bricks are fired clay products with low porosity, low creep clay bricks are fired clay products with low creep rate, and thermal shock resistant clay bricks are fired clay products with good thermal shock performance.
Ordinary clay bricks are divided into five grades according to physical and chemical indexes: PN-42, PN-40, PN-35, PN-30, PN-25. In the grade, PN is the first letter of the common and sticky Chinese pinyin, and the number is the mass percentage of aluminum oxide.
Dense clay bricks are divided into six grades according to physical and chemical indexes: ZMN-45, ZMN-42, ZMN-42L, ZMN-40, ZMN-30, ZMN-25. In the grade, Z, M, N and L are the initial letters of Chinese pinyin for inducing, dense, sticky and phosphorus, and the numbers are the mass fraction of aluminum oxide. Among them, ZMN-42L is phosphate impregnated brick, ZMN-30, ZMN-25 is alkali resistant clay brick.
According to physical and chemical indexes, low creep clay bricks are divided into: DRN-128A, DRN-128B, DRN-125, DRN-120, DRN-115, DRN-110, DRN-105 seven brands. In the grade, DRN is the initial letter of Chinese pinyin with low, creep and viscosity, the number is 1/10 of the creep rate test temperature, and the letters A and B after the number are the grading code required by different grades of the same grade.
Thermal shock resistant clay bricks are divided into two grades: RZN-42 and RZN-40 according to physical and chemical indexes. In the brand, RZN is the initial letter of Chinese pinyin for heat, shock and viscosity, and the number is the mass fraction of aluminum oxide.