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Calcium Silicate Board for Cement Kiln

Calcium silicate boards used in cement plants generally refer to those applied in areas such as decomposition furnaces, preheaters, tertiary air ducts, kiln hoods, coolers, and smoke chambers. Because these boards are specifically used in cement plants, they are commonly referred to as cement plant calcium silicate boards. They are typically designed for use at temperatures up to 1050 °C, featuring high strength, good toughness, and excellent thermal insulation performance.

The main raw materials of cement plant calcium silicate board are calcium hydroxide and quartz sand. The raw materials are first ground and purified, then reinforcing fibers are added and reacted in an autoclave.

After the reaction is complete, the mixture is poured into a press for pressure forming. The formed boards are then placed into a 60-meter-long tunnel kiln for drying. After approximately one week of drying, the finished cement plant calcium silicate boards are produced.

Advantages of Calcium Silicate Board for Cement Kiln:

  1. High strength: Cement plant calcium silicate board features high strength, which not only reduces damage during transportation but also minimizes breakage during installation.
  2. Good toughness: With excellent toughness, the board maintains its shape under high-temperature conditions, ensuring overall stability and providing safety during use.
  3. Excellent thermal insulation: The board has very low thermal conductivity, which reduces heat transfer and energy loss, offering superior insulation performance.
  4. High-temperature resistance: Designed for use at temperatures up to 1050 °C, the board retains its performance under high heat, demonstrating strong high-temperature resistance.
MAGSCIE Unit CSHT-225 CSHT-245 CSHT-260 CSHT-375

Maximum service

temperature

 °C 1000 1050 1100 1100
°F 1832 1922 2012 2012
Bulk density kg/m³ 225 245 260 375
lb/ft³ 14 15 16 23
Compressive strength 
    at 5% deformation Mpa 0.8 1 1.2 1.7
lb/in² 116 145 174 246
    at ultimate load
 Mpa 2.6 2.7 2.7  
lb/in² 377 391 391  
Modulus of rupture
    at 5% deformation Mpa 0.45 0.5 0.55 0.8
lb/in² 65 72 80 116
    at ultimate load Mpa 1.9 1.3 1.3  
lb/in² 275 188 188  
Linear reheat shrinkage after 12 hours 
    at 1,050°C (1,922°F) % 1 1.5 1.5 2
Reversible Linear Thermal Expansion
    at 2000°F (1093°C) % 0.06 0.06 0.06 0.06
Thermal conductivity
        200°C W/(m.K) 0.085 0.095 0.097 0.12
        400°C W/(m.K) 0.100 0.108 0.109 0.15
        600°C W/(m.K) 0.152 0.156 0.157 0.16
        800°C W/(m.K) 0.214 0.216 0.218 0.19
        392°F BTU/(ft²×h×°F/in) 0.590 0.659 0.673 0.83
        752°F BTU/(ft²×h×°F/in) 0.694 0.749 0.756 1.04
        1112°F BTU/(ft²×h×°F/in) 1.055 1.082 1.089 1.11
        1472°F BTU/(ft²×h×°F/in) 1.485 1.499 1.513 1.32
Chemical analysis
        SiO2 % 47 47 47 52
        Al2O3  % 0.4 0.4 0.4 1.2
        Fe2O3 % 0.3 0.3 0.3 0.3
        MgO % 0.6 0.6 0.6 0.7
        CaO % 40 40 40 35
        Na2O % 0.1      

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