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Mulite Insulation Brick

Mullite insulation brick, also called lightweight mullite brick, is a new type of energy-saving and environmentally friendly refractory material in China and in possession of excellent thermal insulation capacity.


Using imported plate-shaped corundum, high-purity fused corundum as the main raw material, adopting advanced ultra-fine powder adding technology, mullite insulation brick is fired in a high-temperature shuttle kiln after mixing, drying, and molding.

Mullite Insulation Bricks have the advantages of high refractoriness, high strength, high purity, excellent thermal shock resistance, low thermal conductivity, low heat fusion.
Due to the low thermal conductivity, mullite insulation bricks accumulate little heat energy and have a significant effect on energy saving.
The Precise Size can speed up the masonry, reduce the amount of refractory mortar, save the cost and ensure the strength and stability of the masonry, so as to achieve the purpose of extending the life of the lining.

Applications Of Mullite Insulation Brick

Mullite insulation brick is applicable for various industrial furnaces, which can directly contact the flame, such as electric porcelain drawer kiln, petroleum cracking furnace, metallurgical hot blast stove, tunnel kiln, ceramic roller kiln, glass kiln, and various electric furnace linings, etc.
At present, mullite insulation brick can be directly used for the lining of the high-temperature kiln and has been widely used in the lining of shuttle kiln, glass kiln, and petrochemical kiln.

items JM23 JM26 JM28 JM30 JM32
Classification Temperature (℃) 1260 1430 1540 1650 1760
Bulk Density (g/cm3) 0.55-0.60 0.78 0.88 1.03 1.25
Cold Crushing Strength (Mpa) 1.2 1.6 2.1 2.5 3.5
Modulus of Rupture (Mpa) 0.9 1.4 1.6 2.1 2.1
Reheating Linear Change (%)

CT-30 ℃X 8H

1230℃

-0.5

1400℃

-0.5

1510℃

-0.5

1620℃

-0.9

1730℃

-0.9

Thermal Expansion

1000℃(%)

 0.5  0.7 0.8  0.9  1.1
Thermal conductivity(W/m.k) 400℃ 0.14 0.27 0.32 0.41 0.49
600℃ 0.16 0.29 0.34 0.43 0.5
800℃ 0.18 0.31 0.36 0.44 0.51
1000℃ 0.20 0.33 0.38 0.45 0.53
Al2O3 (%) 37 54 64 72 77
Fe2O3 (%) 1.0 0.9 0.8 0.7 0.5

mulite insulation brick3

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