Ceramic fiber boards are manufactured from high-purity alumino-silicate fibers, bonded together using inorganic binders. The fibers are produced through a high-temperature spinning process, creating a uniform, lightweight structure with low thermal conductivity. Unlike traditional insulating materials, ceramic fiber boards maintain structural integrity at temperatures ranging from 1260°C to 1600°C, making them ideal for high-temperature industrial applications.
（1）Low thermal conductivity,
（2）Low heat capacity, excellent thermal stability
（3）High thermal shock resistance and compressive strength
（4）Good toughness
（1）Industrial kiln wall linings
（2）High temperature kiln linings
（3）High temperature and high heat equipment insulation
（4）Shipbuilding industry insulation and fire protection
（5）Sound insulation and insulation
|
PROJECT |
INDEX |
|||
|
MODEL |
1260 |
1350 |
1450 |
|
|
Working Temperature（℃≥） |
1100 |
1250 |
1350 |
|
|
Density (kg/m3) |
220-500kg |
|||
|
Thermal conductivity by mean temp.( w/m.k ) |
0.085(W/m.k)(400℃) 0.132(W/m.k)((800℃) 0.180(W/m.k)((1000°C) |
|||
|
Compression strength(Mpa) |
0.5 |
|||
|
Chemical Composition(%) |
AL2O3 |
42~43 |
52~53 |
35 |
|
SIO2 |
53 |
46 |
45 |
|
|
ZrO2 |
- |
- |
15-17 |
|
|
Fe2O3 |
≤1.2 |
≤0.3 |
≤0.2 |
|
|
Na2O+k2O |
≤0.5 |
≤0.3 |
≤0.2 |
|
|
SIZE |
Length1200*Width600 |
Thickness20-30-40-50mm |
||
Ceramic fiber boards have become an essential insulation solution in modern industrial kilns. Designed to withstand extremely high temperatures while providing excellent thermal insulation, these boards help improve energy efficiency, reduce heat loss, and protect furnace structures. Whether you are operating a rotary kiln, tunnel kiln, or heat-treatment furnace, understanding the properties and applications of ceramic fiber boards is critical for optimal performance and longevity.
This guide covers everything you need to know about ceramic fiber boards in kiln applications: composition, types, thermal properties, selection criteria, installation practices, and long-term maintenance.
Ceramic fiber boards are manufactured from high-purity alumino-silicate fibers, bonded together using inorganic binders. The fibers are produced through a high-temperature spinning process, creating a uniform, lightweight structure with low thermal conductivity. Unlike traditional insulating materials, ceramic fiber boards maintain structural integrity at temperatures ranging from 1260°C to 1600°C, making them ideal for high-temperature industrial applications.
Key properties include:
Ceramic fiber boards provide excellent thermal insulation, reducing heat transfer and improving temperature control. By minimizing energy loss, they help operators save on fuel costs and increase furnace efficiency.
The lightweight structure and low thermal conductivity reduce the amount of heat lost through the furnace walls. This translates to:
Ceramic fiber boards are significantly lighter than refractory bricks or castable materials, allowing:
Ceramic fiber boards are used across various kiln types:
Rotary kilns are widely used in cement production, metallurgy, and chemical processing. Ceramic fiber boards line the backup insulation layer, protecting refractory bricks and ensuring consistent internal temperatures.
In tunnel kilns, boards are installed to maintain heat uniformity along the length of the furnace, reducing energy consumption and improving product quality.
Heat-treatment furnaces in metal processing benefit from ceramic fiber boards for precise temperature control, ensuring uniform hardening, annealing, or tempering.
Reheating furnaces used in steel and alloy production rely on ceramic fiber boards to maintain high temperatures while minimizing energy losses and protecting the furnace shell.
Different kilns operate at varying temperatures. Choosing the correct board grade ensures thermal stability and prevents premature degradation.
| Board Type | Max Operating Temperature |
| Standard Board | 1260°C |
| High-Temperature | 1400°C |
| Ultra-High Temp | 1600°C |
The thickness and density of the board determine insulation efficiency and mechanical strength. A denser board provides higher compressive strength but may slightly reduce insulating efficiency.
Consider the furnace atmosphere: oxidizing, reducing, or neutral. Some boards perform better in specific atmospheres. Consult technical specifications to ensure compatibility.
Install ceramic fiber boards in layers with staggered seams to minimize thermal bridging. Ensure tight joints to prevent heat leakage.
Boards can be fixed using anchors, stainless steel pins, or adhesives, depending on the furnace design. Proper anchoring prevents sagging and extends service life.
High temperatures cause thermal expansion. Maintain appropriate expansion gaps to prevent cracking or warping of boards.
| Material | Max Temp | Thermal Conductivity | Weight | Ideal Use |
| Ceramic Fiber Board | 1260–1600°C | 0.11–0.16 W/m·K | Light | Backup insulation |
| Ceramic Fiber Blanket | 1200–1600°C | 0.09–0.14 W/m·K | Very Light | Flexible insulation |
| Insulating Fire Brick | 1600–1750°C | 0.6–1.0 W/m·K | Heavy | Hot-face insulation |
| Refractory Brick | 1600–1800°C | 1.0–2.0 W/m·K | Very Heavy | Hot-face & structural |
| Problem | Solution |
| Board sagging or detachment | Use proper anchors or adhesive techniques |
| Shrinkage at high temperatures | Select high-temperature rated boards |
| Cracking or chipping | Maintain correct expansion gaps |
| Reduced insulation efficiency | Ensure tight joints and proper thickness |
A1: No, they are mainly used as insulation layers or backup linings. Hot-face areas still require refractory bricks.
A2: Depending on temperature, atmosphere, and installation, properly installed boards can last several years.
A3: Slight shrinkage may occur near the maximum operating temperature. Using boards rated for the kiln temperature minimizes shrinkage.
A4: Yes, boards can be cut with appropriate tools. Always handle with care and wear protective gear.
A5: Boards are non-combustible but should be handled with gloves and masks to avoid fiber irritation.
Ceramic fiber boards are a high-performance insulation solution for industrial kilns. By selecting the correct grade, thickness, and installation method, operators can achieve improved energy efficiency, reduced maintenance, and consistent furnace temperatures. Highland Refractory provides a range of ceramic fiber boards customized for various kiln types, helping industries optimize production and protect furnace structures for long-term performance.
High alumina poly light brick is a high quality lightweight refractory material.
Low creep clay bricks have a low creep rate in high temperature environments and can maintain good shape and dimensional stability for a long time.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
Refractory cement, also known as aluminate cement, is a fire-resistant hydraulic cementitious material.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
Silicon carbide plates are mainly composed of silicon carbide (SiC) as the aggregate (with a content usually ≥ 80%).
