Analysis of factors causing damage to refractory castables

1. Drastic changes in temperature cause refractory castables to be damaged too quickly

The thermal shock stability of refractory castables is relatively poor, and severe temperature changes can easily cause damage. For example, the cooling zone of the rotary kiln is not only subject to the erosion of clinker, but also constantly receives the effect of secondary high-temperature clinker. The kiln lining material is sometimes buried under high-temperature materials, and sometimes exposed to flames, causing the surface temperature of the lining material to change with the rotation of the kiln, with a temperature difference of more than 200 degrees Celsius. If it is a cold cellar. This temperature change will be more severe, which are factors that cause damage to refractory castables.

2. The anchors fall and the refractory castable material falls into pieces.

During the use of refractory castables, the anchors play a role in tightly sticking to the container wall, maintaining the integrity of the castables, and resisting bending of the castables. In the places where the refractory castables fell in pieces, inspection found that many places had fallen off by their roots, leaving only traces of some solder joints.

3. Caused by the kiln not operating properly

Under abnormal conditions such as burning or kiln shutdown, rapid temperature changes often occur, causing infinite internal stress in the castables, leading to damage due to thermal fatigue.

4. Construction factors

Refractory castables have strict construction requirements, so they must be operated in accordance with the requirements to ensure excellent physical properties of refractory castables. Some companies use overall pouring, without leaving expansion joints in accordance with regulations, and consume a relatively large amount of water, which eventually leads to peeling, bursting, and large-scale falls.