The appearance of impurities depends on the content of impurities on the surface of refractory bricks. In refractory bricks, we often see that there are some black spots on the surface. These are the impurities in the raw materials. Theoretically, the fewer impurities, the better, because these impurities are mostly iron oxidation. In the high temperature environment of the kiln, it is simply reduced to molten iron flowing out, resulting in damage to the refractory brick structure, and then affecting the service life of the refractory brick.

First of all, the abrasion resistance of refractory bricks depends on the composition and structure of the refractory bricks. When the composition of the refractory bricks is a fine polycrystal composed of a single crystal, the abrasion resistance mainly depends on the hardness of the mineral crystals that make up the material.

Several problems that should be avoided when building refractory bricks Refractory bricks are mainly used for building smelting furnaces, which can withstand high temperatures of 1580°C to 1,770°C.Refractory material with a certain shape and size.