Refractory Bricks
manufacture lightweight JM 28 mullite insulation brick for heating furnace

manufacture lightweight JM 28 mullite insulation brick for heating furnace

Mullite Insulation Brick is a kind of quality refractory insulation materials for resisting high temperature with features of light weight, low thermal conductivity, thermal insulation and high compression strength in the high temperature furnaces or kilns. Mullite Insulation Bricks are mainly used for the top of hot blast stove, stack and bottom of blast furnace, regenerative chamber of glass melting furnace, lining of ceramic high temperature furnace and so on.

manufacture lightweight JM 28 mullite insulation brick for heating furnace

manufacture lightweight JM 28 mullite insulation brick for heating furnace

Mullite Insulation Brick is a kind of quality refractory insulation materials for resisting high temperature with features of light weight, low thermal conductivity, thermal insulation and high compression strength in the high temperature furnaces or kilns. Mullite Insulation Bricks are mainly used for the top of hot blast stove, stack and bottom of blast furnace, regenerative chamber of glass melting furnace, lining of ceramic high temperature furnace and so on.

Mullite Insulation Brick is manufactured with mullite as the main crystal phase and contains about 65~75% alumina content. Mullite Insulation Refractory Brick has high refractoriness that reaches up to 1790 ℃. Its apparent initial softening temperature is about 1600~1700 ℃. Its cold crushing strength is about 70~260MPa.
Mullite Insulation Refractory Brick can be classified into different types of 1350 Mullite Insulation Brick, 1450 Mullite Insulation Brick and 1550 Mullite Insulation Brick according to different service temperature and into Lightweight Mullite Brick and Heavy Mullite Brick according to different bulk density.

Features

  manufacture lightweight JM 28 mullite insulation brick for heating furnace

manufacture lightweight JM 28 mullite insulation brick for heating furnace

Mullite Insulation Brick is a kind of quality high temperature materials with the following excellent performance:
Low thermal conductivity and Low heat capacity
High Purity and low impurity content
Excellent high temperature strength
Good thermal shock resistance
Low expansive conductivity
Great resistance to acid and alkali erosion

Lightweight Mullite Insulating Bricks Features:
1.Excellent compression strength
2.Excellent heat stability
3.Low thermal conductivity
4.Low heat storage
5.High alumina, low iron and alkali flux content
6.Accurate dimension
7.designed packaging

Specification

   manufacture lightweight JM 28 mullite insulation brick for heating furnace

manufacture lightweight JM 28 mullite insulation brick for heating furnace

Mullite Insulation Brick Specification

Mullite Insulation Brick

Item/IndexHT23HT26HT28HT30HT32
Al2O3 %3754647277
Fe2O3 %1.00.90.80.70.5
 

 

Thermal Conductivity (w/m*k)

400℃0.140.270.320.410.49
600℃0.160.290.340.430.5
800℃0.180.310.360.440.51
1000℃0.200.330.380.450.53
Classification Temperature (℃)12601430154016501760
Thermal Expansion 1000℃ (%)0.50.70.80.91.1
Bulk Density (g/cm3)0.55-0.620.78-0.80.881.031.25
Cold Crushing Strength (Mpa)1.21.62.12.53.5
Modulus of Rupture (Mpa)0.91.41.62.12.1
Reheating Linear Change (%)

 

CT-30℃*8H

1230℃

 

-0.5

1400℃

 

-0.5

1510℃

 

-0.5

1620℃

 

-0.9

1730℃

 

-0.9

Mullite Insulation Brick common size

size
L×W×H (mm)L×W×H/h (mm)L×W×H/h (mm)
230×114×65230×614×64250×640×64
230×114×76230×614×76
Other sizes according to customer requirements

manufacture lightweight JM 28 mullite insulation brick for heating furnace


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