Refractory Mullite Insulating Refractory Brick JM 29

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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 29 

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Q:Are there any construction waste materials for composite thermal insulation bricks?
Material production of ordinary light insulating brick clay, high alumina high strength low iron bead brick, mullite, high aluminum light insulating refractory brick, diatomite insulating refractory brick.
Q:What is the price of concrete self insulation bricks
If you really want to buy thermal insulation brick, do not simply look at the price, but also to consider the quality of the product. (a piece of brick in the market basically in 6 yuan, if there is a floating price if it is because of the size of the insulation brick or distance, but floating slightly.)
Q:The structural specification does not indicate that masonry needs insulation bricks. Is it necessary to use insulation bricks?
Look at the exterior wall insulation design, construction practices and related requirements
Q:Clay insulation bricks insulation, brick and ordinary clay brick, fireclay, brick distinction, and its use? Thank you
The contrast between the two should not be much different, the insulation brick in the masonry wall at the same time, will be good insulation effect into the wall.
Q:What are the improvements and improvements during the trial production of insulating bricks?
Insulation brick seven characteristics: insulation, heat insulation: effectively reduce energy consumption.Fire prevention: up to national standard or class A.Clean and environmental protection: no two pollution will be caused by air.
Q:What is mullite insulation brick?
According to the application temperature can be divided into: 1350 mullite bricks, 1450 mullite bricks, 1550 mullite brick etc..
Q:Why does the water drop first and then rise when the boiler fires?
Often in the operation of the boiler, the steam water mixture to the drum after intense evaporation of a large number of bubbles in the water side, the water volume expansion. By actual water level drum water level indicator is higher than the water level
Q:The project cost in hydropower No.3 shaft wall is solid brick or insulating brick?
From the structure principle, hydropower shaft with solid brick, is to consider the safety performance of the structure.
Q:What is the thermal insulation performance of aerated bricks?
Dongfeng steam free insulation performance of aerated brick brick production equipment; because the thermal conductivity of foamed concrete block is only 0.21W/M.K, which is 4 times the heat preservation effect of clay brick, cement brick 3 times, so it can improve the living comfort, hot summer and cold winter, can be greatly reduced the running time of the air conditioner,
Q:What materials are used for roof insulation
There are two kinds: one is a kind of cotton insulation board, such as rock wool board, aluminum silicate cotton board, but this is not environmental protection, harmful to life, foam board (this fire safety factor minimum), these relatively cheap.

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