Refractory Mullite Insulating Refractory Brick JM 40

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General Information

CMAX insulating firebricks are classified under temperature between 1300 to 1700, manufactured from high purity alumina clay.

1. Lower content of iron, alkaline and impurities, good high temperature properties.
2. Homogeneous structure, light weight, energy saving because lower heat storage in the furnace during cooling cycles.
3. High strength, good thermal shock resistance under high temperature.
4. Precise sizes due to grinding and shaping after sintering, which meets the requirement of construction.
5. Max service temp: Up to 1730C (3160F)


Light weight and low thermal conductivity    
Low heat storage  
Low iron and impurities  
High thermal shock resistance


Application of Insulating brick

Metallurgical Industry: blast furnace, hot blast furnace, heating furnace, etc..

Petrochemical Industry: ethylene cracking furnace, hydrogen furnace, the main furnace, heating furnace, etc..

Ceramic industry: roller kiln, kiln, etc..

Glass industry: glass furnace regenerator, etc.

Carbon industry: carbon furnace, etc..

Aluminum electrolysis industry: aluminum reduction cell, etc.

Other industries: tunnel kiln, shuttle kiln, etc.


Advantages of heat insulation brick

Low thermal conductivity: many air holes will bring good thermal insulation effect, energy saving.

High crushing strength: high crushing strength, volume stability.

Low heat storage: small heat storage, absorb more heat, energy-saving effect is obvious.


Technical Data






Classification       Temperature, /          





Bulk       Densityg/cm³  





Reheating       Linear Change, %

 ≤0.9                     (1550,12   h)  

            ≤0.8                          (1510,12   h)

            ≤0.7                             (1410,12     h)

 ≤0.5                         (1230,12   h)  

Al2O3       Content, %           





Fe2O3       Content,       %                   





Thermal       Conductivity:      

 800,   w/m.k     





 1000,   w/m.k





 1200,   w/m.k





Insulating brick

Refractory Mullite Insulating Refractory Brick JM 40

Refractory Mullite Insulating Refractory Brick JM 40

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