How to Choose the Right Calcium Silicate Board for Furnace Insulation
Choosing the correct insulation material is critical for furnace performance, energy efficiency, and service life. Calcium silicate board is one of the most widely used solutions in industrial furnace insulation due to its excellent thermal stability and mechanical strength.
Why Calcium Silicate Board is Used in Furnaces
- Service temperature up to 1100°C
- Low thermal conductivity for energy saving
- High compressive strength for structural support
- Non-combustible and safe material
Common Furnace Applications
- Induction furnace lining
- Steel reheating furnace
- Cement kiln insulation
- Heat treatment furnace
How to Choose the Right Density
Different furnace areas require different density levels:
- 220–500 kg/m³ – Insulation layer (heat retention)
- 800–1000 kg/m³ – Load-bearing insulation
- 1000–1200 kg/m³ – Molten metal contact or high strength area
Calcium Silicate vs Other Materials
- Vs Ceramic Fiber: Higher strength and longer life
- Vs Refractory Brick: Lower heat loss and easier installation
- Vs Microporous Board: Better mechanical performance
Key Selection Tips (From Real Projects)
- Always consider load + temperature together
- Use high density boards near hot face or metal contact
- Use low density boards as backup insulation
- Ensure proper installation to avoid thermal cracks
Need Help Choosing the Right Material?
At HR RHINO, we supply a full range of calcium silicate boards from 220 kg/m³ to 1200 kg/m³, including high-density grades for molten aluminum contact and CNC machined parts.
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👉 Request Custom CNC Parts
Contact Us
Send us your furnace drawings or requirements — our engineers will recommend the most suitable material and density.
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