Ordinary high-alumina refractory brick is an important material used in high-temperature and high-pressure industries such as metallurgy, building materials, and chemical engineering. As per GB/T 2988-2023, these bricks are classified into four grades: Grade I, Grade II, Grade III, and Grade IV. Each grade has its own specific technical parameters and characteristics.
Grade I high-alumina refractory brick has a minimum alumina content of 75% and a maximum apparent porosity of 23%. Grade II has a minimum alumina content of 65% and a maximum apparent porosity of 25%. Grade III has a minimum alumina content of 55% and a maximum apparent porosity of 28%, while Grade IV has a minimum alumina content of 45% and a maximum apparent porosity of 30%.
These bricks are typically made from bauxite or other high-alumina materials. The raw materials are crushed, ground, mixed, and then molded into the desired shape. Next, the bricks are fired in a kiln at high temperatures, which causes them to vitrify and become hard and dense.
The production process is crucial in ensuring that these refractory bricks can withstand high temperatures and pressure. The quality of the raw materials, mixing ratio, and firing temperature all play a critical role in determining the properties of the final product. In addition, these bricks are also highly resistant to thermal shock and mechanical abrasion.
In conclusion, ordinary high-alumina refractory brick is an essential material for various high-temperature and high-pressure applications. Its classification, technical parameters, and production process ensure that it can withstand extreme conditions while maintaining its structural integrity. Through continued research and development, these bricks will continue to be an integral part of the modern industrial landscape.
Industry Knowledge of Ordinary High-Alumina Refractory Brick
Apr 23, 2024
