Firebrick is a kind of building material specially designed to withstand high temperature environment, its ability to withstand high temperature mainly depends on its material and manufacturing process. Generally speaking, the refractory temperature range of refractory bricks is quite wide, which can range from several hundred degrees Celsius to more than 1700 degrees Celsius. This mainly depends on the chemical composition, mineral composition and microstructure of the refractory brick.

The main raw materials of refractory bricks include various refractory minerals, such as clay, high bauxite, siliceous materials, magnesium materials and other special minerals. These materials are made by crushing, screening, mixing, molding and sintering. During the sintering process, the minerals in the raw material will chemically react to form a new, more heat-resistant mineral structure, thus giving the refractory brick excellent high-temperature stability. For example, the fire temperature of clay refractory bricks is generally about 1350-1400 degrees Celsius. This refractory brick is mainly used in some medium and low temperature industrial kilns. The high alumina refractory brick, due to its high alumina content, the refractory temperature can reach 1600-1700 degrees Celsius, suitable for higher temperature industrial environments, such as steel furnaces, glass kilns and so on. Silica refractory bricks are known for their high melting point and high thermal stability, and their refractory temperature can usually reach more than 1700 degrees Celsius. This kind of refractory brick is mainly used in the contact parts of high temperature melting and molten metal, such as the bottom and hearth of ironmaking blast furnaces. Magnesium refractory brick and chromium refractory brick, also because of their special chemical composition and mineral composition, and have a very high fire temperature. Magnesia refractory brick is mainly used in high refractories, such as cement rotary kiln, glass melting kiln, etc. Because of its excellent slag resistance and high temperature stability, chrome refractory brick is widely used in iron and steel metallurgy, glass manufacturing and other industries. It is worth noting that the refractory temperature of refractory bricks is not the only performance indicator. In practical application, it is also necessary to consider the thermal shock resistance, slag resistance, wear resistance, erosion resistance and other factors of refractory brick.

Therefore, when selecting firebrick, it is necessary to consider its various performance indicators according to the specific use environment and requirements. In general, how much heat refractory brick can withstand depends on its specific material and manufacturing process. Different firebricks are suitable for different high temperature environments, and the choice needs to be weighed and selected according to the actual situation.