Insulating Fire Brick GJM26 Light Weight and Low Thermal Conductivity

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1 m.t.
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20000 m.t./month

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General Information of Insulating Firebricks

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


Feature of Insulating Firebricks

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


Application of Insulating Firebricks

CMAX insulating firebricks 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.


Images of Insulating Firebricks

Insulating Fire Brick GJM26 Light Weight and Low Thermal Conductivity

Insulating Fire Brick GJM26 Light Weight and Low Thermal Conductivity


Technical Data of Insulating Firebricks

Classification Temperature (℉/℃) 2600/1430
Bulk Density (g/cm3) ≤0.8
Thermal Conductivity
800℃, W/m.K ≤0.35
1000℃, W/m.K ≤0.39
1200℃, W/m.K ≤0.43
Reheating Linear Change (%) 1410℃×12h
Chemical Composition (%)
Al2O3 ≥55
Fe2O3 ≤0.7


Company Introduction

Who CNBM is

CNBM is a Fortune 500 and a governmental owned National Building Material company in Beijing, China.

What CNBM Can Do

We can supply ALL KINDS OF REFRACTORIES BRICK/CASTABLE and CERAMIC FIBER PRODUCTS in high quality and competitive price.

What Certification CNBM Have

Insulating Fire Brick GJM26 Light Weight and Low Thermal Conductivity 



  • If I need your offer, what information do you need?

In order to choose suitable products, it will be appreciated to provide us the information, such us specification, technical data, order quantity, products application etc.
If any question, please contact us freely.


  • How do you control the products quality?

With strict quality control system throughout the materials selection and production process, our refractory and ceramic fiber products quality is effectively controlled to meet customer requirements.
From the raw materials selecting, our quality control begin. The quality certificates of raw materials are required and each batch will be tested before using. During production, the quality control are conducted by workers and then each piece will be sorted and examined by quality supervisor.


  • I’m not satisfied with the refractory materials I used before, can you propose more suitable pro

Yes. Please give us the problems you faced, your requirements and the technical data of the products you used before. That we will give you our suggestion and propose the solution based on your special requirements.


  • What’s the lead time for my order?

It depends on customers’ requirements and our production schedule. And usually we need 30-60 days for refractory bricks,10-25 days for unshaped refractory materials and 10-20 days for ceramic fiber blankets.


  • Can you offer Door-to-Door delivery?

Yes, but only for some countries such us U.S., UAE, Saudi Arabia, Iran, and Russia, etc.


  • What is the minimum quantity?

There is no minimum order quantity. Depending on the item and processing, there may be a minimum production required, however we can offer a quotation based only on the quantity you need.

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Remaining: 4000 characters

- Self introduction

- Required specifications

- Inquire about price/MOQ

Q:What is the price of refractory bricks
The refractory insulating brick generally refers to light brick, normal furnace lining are using this brick kiln will not increase the weight, and good heat insulation effect and ordinary insulating brick production are made of clay, high alumina high strength low iron bead brick, mullite, high aluminum light insulating firebrick, diatomite insulating refractory brick, the use of light heat insulation brick can increase the use of the area, at the same time, good insulation effect, in the hot summer, the temperature of the furnace using solid clay brick and low 2-3 ~ C, reduce the power consumption. The construction is superior, the light insulating brick has good machinability, and the construction is convenient and simple, and the labor intensity can be reduced, the construction efficiency can be improved, and the construction period can be shortened. The price is determined by the choice of material and volume density, from several hundred to 5000 yuan, mainly with the choice of material
Q:How to reinforce a porous brick foundation?
The basic type method is changed from independent basis to strip foundation, from strip foundation to raft foundation and pile foundation, from brick to concrete strip foundation.
Q:What are the bubble bricks?
The requirements for production conditions are not high. Simple shed to plant products without open storage, warehouse, on the quality of workers is not high.
Q:Which kind of balcony heat preservation material is better?
To environmental protection, then use inorganic insulation materials, such as composite silicate, rare earth insulation, this thickness should be more than 5 cm, the construction of auxiliary materials, high cost, to be strengthened
Q:The difference between ordinary and diatomite brick refractory brick?
Insulation products made from diatomaceous brick and porous diatomite. The main raw material is natural porous diatomite, and then a small amount of clay and fuel are added. The volume density of diatomite brick was 0.7g/cm3, compressive strength at room temperature is 1 ~ 2MPa, the coefficient of thermal conductivity at 400 C for 0.13 ~ 0.20W/ (M - K), the apparent porosity is greater than 70%, the coefficient of thermal expansion (1280 degrees) 0.9 x 10 - 6 DEG -1, refractoriness is greater than 1250 DEG C. Mainly used in industrial kilns and other thermal equipment, thermal pipes insulation materials, generally withstand the hot surface temperature of about 1000 degrees celsius. Mainly used in industrial kilns and other thermal equipment, thermal pipes insulation materials, generally withstand the hot surface temperature of about 1000 degrees celsius.
Q:What is the price of thermal insulation brick for exterior wall?
But also depends on how your drawings are made, so as to quote a specific price. There is also the price of each place is not the same, so the quotation will be different.
Q:If there is a main component of cenosphere light insulating brick.
Light heat insulation brick with cenosphere composition, material properties will be more high, especially the main properties of thermal conductivity
Q:Outside brick wall, inside brick wall how to return a responsibility?
In general, the wall of the building and outdoor harsh environment, so the general exterior wall tiles with full ceramic tile surface, then is the kind of uneven, and the appearance of the size deviation of brick is relatively large.
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:What is the bulk density of insulating bricks?
National classification standard: water absorption rate of ceramic tile is less than or equal to 0.5%;

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