Refractory bricks have the following basic characteristics:
1. Chemical composition: the main components determine the quality and characteristics of the refractory
2. Bulk density: The weight density per unit volume is high, indicating that the density is good, the strength may be high, but the thermal conductivity may be large
3. Apparent porosity: no specific requirements are made, but as a manufacturer, it is necessary to strictly control the apparent porosity
4. Load softening temperature: also called high temperature load starting deformation temperature, this parameter is very important, marking the material’s resistance to high temperature
5. Thermal shock resistance: the ability to resist rapid temperature changes without being damaged
6. Compressive strength: the maximum pressure ability to withstand (normal temperature)
7. Flexural strength: the ability to withstand shear stress
Linear change rate: also called reburning line change or residual line change, it refers to the change of volume expansion and contraction in the same temperature change each time, if each expansion and contraction is the same, we define such a linear change rate as 0.
