How to choose refractory brick correctly for industrial furnace?

Due to different operation departments, even in different parts of the same furnace, the working conditions are not consistent. Therefore, the requirements of refractory bricks for industrial furnace are also different.

The selection of refractory bricks for industrial furnaces should meet these performance requirements

Based on the general working conditions of ordinary industrial furnaces, the following requirements for the performance of refractory bricks are put forward

1. Resistance to high temperature heat load, no softening, no melting. Refractory brick is required to have high fire resistance.
2. Resistance to high temperature heat load, volume does not shrink and only uniform expansion. High volume stability, small residual shrinkage and expansion, no crystal transformation and serious volume effect are required.
3. It can resist the joint action of high temperature heat load and heavy load without losing strength, creep and collapse. It is required that the material should have high strength at room temperature and high temperature, high load softening temperature and high creep resistance.
4. Resistance to rapid temperature changes or uneven heating, no cracking, no spalling. The material is required to have good thermal shock resistance.
5. It can resist chemical erosion of molten liquid, dust and gas without deterioration and erosion. Good slag resistance is required.
6. It can resist the impact, abrasion and abrasion of flame, burden and dust without surface loss.
7. The material is required to have high compactness and wear resistance at room temperature and high temperature.
8. Resist the influence of high temperature and vacuum operation and atmosphere change, no volatilization and damage. Low vapor pressure and high chemical stability are required.

In addition, in order to ensure the overall quality of the structure or lining made of block firebrick. Good slag resistance and air tightness, and easy for construction, but also requires the material shape neat, accurate size, to ensure a certain tolerance, and eliminate the defects that are not allowed. In order to bear the impact and the possible mechanical vibration and extrusion during transportation, the material must have high room temperature strength. For some special requirements, sometimes its thermal conductivity and conductivity should also be considered.