What are the factors that affect the service life of refractory castables at the kiln mouth?
1. Selection of refractory materials
During production, the kiln mouth castables are subject to long-term high temperature erosion, long-term abrasion of clinker, secondary air erosion and rapid cooling and heat caused by starting and stopping the kiln. Therefore, the kiln mouth refractory castables should be resistant to high temperature erosion, wear resistance and good Thermal shock resistance.
2. Selection and construction of anchors
The material, shape, thermal expansion treatment, welding, etc. of the anchor directly affect the service life of the refractory material. The material generally cannot be lower than 0Gr25Ni20, and must be welded firmly. The refractory anchor should be expanded, and the anchor should be painted with asphalt paint or wrapped Tape.
3. Construction of refractory materials and control of water injection volume
The performance of refractory castables is closely related to the construction of the castables. During the actual construction process at the production and maintenance site, it often happens that the construction team only chooses the method that is convenient for construction. If the technicians fail to follow up properly, it is easy to cause The performance of refractory materials decreases and the service life is shortened. During the construction process, construction workers sometimes increase the amount of water injected to make the castables easier to pour and speed up the flow of the castables, resulting in a significant reduction in the strength and performance of the castables.
4. Baking of refractory materials
It plays a great role in the performance of refractory castables. If the baking is not done well, it is easy for the refractory material to burst during the rapid heating process, causing the castables to fall off.
