Why Do Refractory Castables Need To Be Maintained?

The maintenance of refractory castables is a crucial step after the kiln is cast. Good maintenance can ensure that the kiln has a good working performance after it is put into use, and it can also increase its service life. During maintenance, the refractory castable can gradually reach the design strength while avoiding quality problems such as cracking and delamination. Next, let the editor take you to understand in depth why refractory castables need to be maintained:

1. Improve the strength of refractory castables

Through proper maintenance, refractory castables can reach the design strength in a shorter time, ensuring that the refractory castables have sufficient refractoriness and wear resistance after being put into use.

2. Prevent refractory castables from cracking

After the refractory castables are put into production, the rapid high temperature will cause thermal expansion of the refractory castables. If the maintenance is not in place, the internal moisture cannot be fully volatilized, and the refractory castables are prone to cracking. Therefore, oxidation before the initial production can allow the moisture in the refractory castables to fully volatilize, which can effectively reduce the occurrence of cracks.

3. Prevent refractory castables from falling off

During the maintenance process of refractory castables, the refractory castables can be made more firm as a whole, thereby preventing the surface of the refractory castables from falling off. For specific reasons for falling off, please refer to the article “Reasons for Falling of Refractory Castables”.

4. Improve the service life of the kiln

The service life of the refractory castable determines the life of the high-temperature kiln. If the early maintenance is proper, the refractory castable can be fully hardened and the porosity can be reduced, which can improve the refractoriness, density, and impermeability of the refractory castable, thereby extending the service life of the refractory castable.

The maintenance of refractory castables is very important. Good maintenance can effectively extend the service life of high-temperature kilns. However, during the maintenance process, it must be maintained according to the maintenance specifications to avoid the strength of refractory castables being reduced due to improper maintenance, thereby causing a series of problems.