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KT Refractories US Company

Insulating Fire Bricks

Insulating Fire Bricks

Insulating fire bricks (IFBs) are called soft bricks; compared to hard bricks or Fireclay bricks, they are light in weight. They can be easily cut by handheld hack saw or other hand tools like chisel. Insulating firebricks have high porous rate and have excellent insulating properties. KT insulating firebricks are white in color and have precise dimensions.

KT Refractories offers a complete range of insulating firebrick (IFB) that offer excellent performance and value for a wide variety of industries and applications. Different grades of insulating firebrick are manufactured according to international standards, and are suitable to operate in various temperatures and atmospheres up to 3000ºF. Excellent Features of Insulating Firebrick are listed at the lower right side of this page.

For higher temperature insulation, we also distribute Alumina Bubble Bricks for higher hot strengths. For Alumina Bubble Bricks, please click here.

Call KT Refractories at 1-877-365-2995 to order Insulating Firebrick (IFB) today!

Insulating Fire Bricks Data Chart:

Item

 

Classification Tempreture Bulk Density Cold Crushing Strength Modulus of Rupture Permanent Linear Contract Thermal Conductivity (W/m.k)
400°C 600°C 800°C 1000°C 1200°C
KT-HMQ series Insulating Fire Bricks
KT-HMQ-23

1260°C

/2300°F

0.48g/cm3 1 MPa 0.9 MPa

1230°C

24h
-0.1%

0.13 0.15 0.17 0.19 ----
KT-HMQ-26

1430°C

/2600°F

0.79/cm3 1.5 MPa 1.0 MPa

1400°C

24h
-0.2%

0.25 0.27 0.30 0.33 0.35
KT-HMQ-28

1540°C

/2800°F

0.89/cm3 2.0 MPa 1.5 MPa

1510°C

24h
-0.4%

0.30 0.32 0.34 0.36 0.38
KT-HMQ-30

1650°C

/3000°F

1.02/cm3 2.5 MPa 1.8 MPa

1620°C

24h
-0.7%

0.37 0.39 0.42 0.45 0.48
KT-JM series Insulating Fire Bricks
KT-JM23

1260°C

/2300°F

0.60g/cm3 1.2 MPa 0.9 MPa

1230°C

24h
-0.1%

0.17 0.19 0.22 0.25 ---
KT-JM26

1430°C

/2600°F

0.8/cm3 2.4 MPa 1.5 MPa

1400°C

24h
-0.5%

0.24 0.27 0.30 0.33 ---
KT-JM28

1540°C

/2800°F

0.89/cm3 2.6 MPa 1.6 MPa

1510°C

24h
-0.8%

0.30 0.32 0.35 0.38 0.39

KT-JM Series of Insulating Fire Brick Data Details:

Description

KT-JM23 KT-JM26 KT-JM28 KT-JM30

Chemical Composition (%)

Al2O3

42 56 67 73

SiO2

55 41 30 24

Fe2O3

≤1 ≤0.8 ≤0.7 ≤0.7

K2O + Na2O

1.1 1.7 1.7 1.7

Physical Properties

Density (kg/m3)

600 800 900 1000

Classification Temperature (°C)

1300 1400 1500 1550

Cold Crushing Strength (MPa)

1.2 1.8 2.5 3.3

Modulus of Rupture (MPa)

1 1.7 2.3 3.1

Permanent Linear Change (%) x 24 hrs

≤0.6 ≤0.6 ≤0.8 ≤0.9

Thermal Expansion (%) 1000°C

0.5 0.52 0.52 0.53

Thermal Conductivity (W/mK) 

350°C

0.18 0.25 0.33 0.38

400°C

0.2 0.29 0.35 0.4

600°C

0.24 0.32 0.37 0.42
800°C/1472°F 0.22 0.30 0.35  
1000°C/1832°F   0.25   0.32 0.38  

Excellent Features

  • High heat resistance and durability
  • Excellent insulating properties
  • Excellent resistance to thermal shock
  • Low thermal conductivity
  • Low heat storage
  • Excellent construction/compressive strength
  • Particularly suited to high temperature applications above 1600°C or 2800°F
  • Structural integrity can withstand erosive and abrasive environments
  • Low impurity
  • Precise dimensions
  • Typical Applications of IFB:

  • Glass Industries
  • Ceramics Industries
  • Electrolytic Aluminum Industries
  • Iron and Steel Industries
  • Non-Ferrous Metals Industries
  • Power Generation Industries
  • Primary hot surface linings
  • Sulfur recovery equipment
  • Cracking furnace, conversion furnace
  • Heating equipment, heating furnace, even-heating furnace, heat-processing furnace
  • Refining equipment
  • Hot blast stoves
  • Resistance furnace
  • Tunnel kiln, shuttle kiln, bell-cover kiln, glass-pool kiln, etc.
  • Back-up insulation for furnaces and kilns
  • Flue insulation
  • Docs Download:

  • Download Insulating Firebrick (IFB) Data Sheet
  • Download Ceramic Fiber Products Brochure
  • Download Ceramic Fiber Boards MSDS
  • Download Ceramic Fiber Products ASTM Reports
  • Download Insulating Fire Brick MSDS
  • Download Ceramic Fiber Paper MSDS