Currently, all-ceramic fiber linings are widely used for insulation in industrial furnaces, except in cases involving high abrasion, high airflow velocity, or complex chemical conditions. Ceramic fiber is chosen for its high-temperature resistance and light weight. Additionally, it effectively reduces the surface temperature of furnace components, decreases fuel consumption, improves product quality and output, and extends the service life of the furnace.
As for the structure of ceramic fiber linings, a combination of ceramic fiber modules and blankets is often preferred.
Introduction to Layered Blanket Structure
For an all-ceramic fiber furnace lining, different types of fiber materials should be selected for each layer based on the temperature gradient distribution. This approach ensures both economic efficiency and cost reduction.
The layered blanket structure usually involves welding anchor pins to steel plates. Ceramic fiber blankets are then layered through the studs and secured to the furnace wall. A stainless steel mesh is often applied on top to prevent falling. However, manually installing multiple layers of composite ceramic fiber blankets can be challenging.
If more than three different materials are involved, manual installation becomes even more difficult. It not only compromises construction quality but also results in poor overall integrity of the multi-layer composite.
Introduction to Combined Module and Blanket Structure
A more robust approach involves installing ceramic fiber modules over a base layer of lower-temperature-rated ceramic fiber blankets. This structure incorporates a pre-compressed elastic design that compensates for fiber shrinkage, enhances sealing, and offers better flatness and appearance. The working surface can also be sprayed with a hardening agent to reduce fiber drop and extend the lining's lifespan.
Advantages of the Module and Blanket Structure Include:
a. Reduced fuel consumption and increased production output.
b. Lower surface temperature of the furnace.
c. Extended furnace service life.
d. Decreased combustion losses.
