What are the factors that affect the refractoriness of refractory bricks?

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.High hardness, high wear resistance of materials.When the mineral crystals are non-isotropic, the crystal grains are fine and the wear resistance of the material is higher.When the material is composed of multiple phases, its abrasion resistance is directly related to the volume density or porosity of the material, as well as the bonding strength between the components.

Therefore, for a certain type of refractory brick at room temperature, its abrasion resistance is proportional to its compressive strength. When the refractory brick manufacturer considers the above elements when sintering the refractory brick, the abrasion resistance of the refractory brick produced is also better.

In addition, the wear resistance of refractory bricks is related to the temperature during use. Some refractory bricks, such as high alumina bricks, are generally considered to be at a certain temperature (such as within the elastic range of 700-900℃), the higher the temperature is. The lower the abrasiveness, it can be assumed that when the temperature increases, the elastic modulus of refractory bricks is added, and the wear resistance decreases.

When the temperature rises and reaches the maximum value of the elastic modulus, as the elastic modulus decreases, the wear resistance increases instead.For example, the abrasion resistance of clay bricks at 1200-1350 ℃ is even better than that of normal temperature.When the temperature further increases and reaches above 1400°C, the liquid phase viscosity in the refractory product drops sharply, and the wear resistance decreases accordingly.Some refractory bricks, such as chromium-containing refractory bricks, increase in wear resistance as the temperature rises.

The above are the two primary factors that affect the wear resistance of refractory bricks that we have analyzed. The first element mainly depends on the refractory brick manufacturers to improve the production process and formula to increase the wear resistance, and the second element depends on the use of refractory bricks. The company strictly follows the requirements of the use environment of refractory bricks to use, and then can ensure that the wear resistance does not decrease, and achieve the purpose of long-term use.