Insulating fire bricks

This type have low thermal conductivity and low heat storage properties. They may be used as the hot face layer or as backing insulation for dense bricks. Insulation fire bricks occur in range from Grade 23 to Grade 32.

Key Features

  • Low iron content
  • Resistance to thermal shock
  • Low density
  • Low heat storage
  • High insulating properties
  • Energy saving

Examples of Applications:

  • Primary hot face linings
  • Back-up insulation for furnaces and kilns
  • Flue insulation
  • Sulphur recovery equipment
  • Hot blast stoves

Grade

23

26

28

30

32

Al2O3

38%

57%

62%

72%

78%

Fe2O3

0.9%

0.7%

0.6%

0.5%

0.2%

Max Service Temperature

1260°C  /2300°F

1430°C  /2600°F

1540°C  /2800°F

1650°C  /3000°F

1760°C  /3200°F