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CNBM International Corporation

Insulating Fire Brick, Insulating Brick, Refractory Brick manufacturer / supplier in China, offering Insulating Fire Brick (GJM 23, GJM 26, GJM 28), High Alumina Brick, 1260 Ceramic Fiber Blanket STD and so on.

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Supplier Homepage Product Insulating Fire Brick Insulating Fire Brick (GJM 23, GJM 26, GJM 28)

Insulating Fire Brick (GJM 23, GJM 26, GJM 28)

FOB Price: Get Latest Price
Min. Order: 10 Tons
Production Capacity: 1, 500, 000 pcs/year
Transport Package: Carton+Pallet
Payment Terms: L/C, T/T
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Basic Info
  • Model NO.: GJM 23, GJM 26, GJM 28, GJM 30, GJM 32
  • Shape: Brick
  • Trademark: CMAX
  • Origin: China
  • Type: Refractory Material
  • Material: Mullite
  • Specification: ASTM Standard
  • HS Code: 69022000
Product Description

CMAX insulating firebricks are classified under temperature between 1300º C and 1700º C, manufactured from high purity alumina clay by mixing, press-forming, drying, sintering and machining. Bricks contain carefully-graded organic fillers which are burned out during sintering to give a uniform controllable pore structure. This technique makes product feature low thermal conductivity and excellent heat insulation

CMAX insulating firebrick can be used as a hot face lining directly exposed to the heat or as a backup insulation layer in iron and steel mills, non ferrous foundries, petrochemical, ceramic, glass, cement and oil fired electric power generating plants.


Light weight and low thermal conductivity allows thinner furnace walls
Maintain stable structural strength throughout ambient to maximum service temperature
Low heat storage results in rapid cooling and heating operation
Low iron and impurities to enhance reducing atmosphere
High thermal shock resistance in preventing spalling
Non standard sizes and shapes are available upon request


Ceramic shuttle kilns
Metal heat treatment furnaces Steel billet reheating furnaces Oil refinery heaters
Laboratory furnaces

Physical Properties:          
Classification Temperature          30002600
Bulk Densitykg/cm³    ≤ 1.0≤ 0.8
C. C. R. Strength   MPa≥ 3≥ 2.5
Reheating Linear Change%  ≤ 0.9                            (1550C, 12 h)  ≤ 0.8                                      (1510C, 12 h)
Chemical Analysis:            
Al2O3                   %   ≥ 75≥ 65
Fe2O3                       %≤ 0.5≤ 0.6
Thermal Conductivity:          
  800C w/m? k≤ 0.39≤ 0.37
  1000Cw/m? k≤ 0.43≤ 0.41
  1200Cw/m? k≤ 0.48≤ 0.46
Physical Properties:          
Classification Temperature          F23002600
Bulk Densitykg/cm³    ≤ 0.52≤ 0.9
C. C. R. Strength   MPa≥ 1.2≥ 1.8
Reheating Linear Change%  ≤ 0.5                                    (1550C, 12 h)  ≤ 0.7                                            (1410C, 12 h)
Chemical Analysis:            
Al2O3                   %   ≥ 45≥ 55
Fe2O3                       %≤ 1.0≤ 0.7
Thermal Conductivity:          
  800C w/m? k≤ 0.18≤ 0.35
  1000Cw/m? k≤ 0.20≤ 0.39
  1200Cw/m? k---≤ 0.43
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Ms. Celine Zhang
Department Manager
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