Refractory castable is widely used in cement industry because of its low production cost and convenient construction.The normal service life is generally more than one year.
Cause analysis of castable damage
1. Castable falls off due to falling off of anchor parts
Anchoring parts can maintain the integrity of castable and increase the anti-bending effect of castable during the use of castable.In places where castable falls off, anchor parts and roots fall off in many places. It is obvious that the castable flakes fall off due to the welding of the raking nail at the welding spot.
2. Rapid damage of castable caused by repeated and drastic changes in temperature
Castables have poor thermal shock stability and are easily damaged by drastic temperature changes.Taking the cooling belt of rotary kiln (especially at the mouth of kiln) as an example, this part is not only continuously eroded by clinker, but also continuously affected by secondary air and high temperature clinker in the kiln. The repeated periodic temperature rise and fall leads to thermal fatigue of the surface layer of castable, which is the cause of castable damage.
3 Construction Reasons
Refractory castables have a set of strict construction requirements, must be required to operate, to ensure good physical properties of castables.If the operation process violates the construction requirements of refractory castable.Without good control of water addition, or without reservation of expansion joints (generally, expansion joints should be kept every 1.5m), it will inevitably cause great damage when heating up.
