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DJM Series Insulating Fire Brick

Product description

Mullite insulation brick is a new type of refractory material, which can directly contact with fire, characterized with high temperature resistance, lightweight, low thermal conductivity, good energy saving effect, specially suitable for cracking furnace, hot blast furnace, ceramic roller kiln, porcelain kiln extraction, glass crucible and various electric furnaces as lining. It is an ideal product of energy efficiency and longevity.

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Product details

CCEWOOL® DJM series mullite insulating brick, using high pure mullite as raw material, is made by adding alumina powder according to different type and then sintering in high temperature, manufacturing as per ASTM&JIS standard. Classified by working temperature, there are DJM-20, DJM-23, DJM-26, DJM-28, DJM30 and DJM32 .

Characterized with high compressive strength, thermal shock stability, low thermal conductivity. It can be widely used in industries such as metallurgy, petrochemical, machinery, ceramics and so on. It is an ideal product for longevity energy saving and efficiency enhancement. According to user’s requirements, we can add wood flour and polystyrene ball to produce light-mullite insulation brick.

Features and Application

Features:

1. Low thermal conductivity, with good thermal insulation effect;

2. Low heat capacity, due to low thermal conductivity, mullite lightweight insulation brick accumulate little heat energy, and shows obvious energy saving effect in intermittent operation.

3. Low impurity content, with very low content of iron and alkali metal oxide, our mullite insulation brick is characterized with high refractory performance; higher aluminum content enables our product remains good performance in the reducing atmosphere;

4. High compressive strength under high temperature;

5. Accurate appearance size speeds up the bricks laying, saves the use of refractory mortar and also ensures the strength and stability of brickwork and extend the life of the furnace lining.

6. Can be processed into a special shape, in order to reduce the number of bricks and joints.

Application:

Mullite insulation brick can be directly used for high temperature furnace lining; Mullite insulation brick has been widely used in shuttle kiln, roller kiln, glass and petrochemical furnace lining.

Mullite insulation brick is a kind of high-alumina refractories with mullite

(3Al2O3•2SiO2) as its main crystal phase.

Size and TDS

CCEWOOL ® DJM series mullite insulating brick

Item

DJM20

DJM-23

DJM-24

DJM-26

DJM-28

DJM-30

DJM-32

Classification Temp(℃)

1200

1260

1300

1430

1540

1650

1760

Bulk Density(g/cm3)

0.5

0.6

0.7

0.8

0.9

1

1.25

Crushing Strength(MPa)

1.1

1.2

1.4

1.6

2.1

2.5

3.5

Modulus of Rupture(MPa)

1.0

0.9

1.2

1.4

1.6

2.1

2.1

Permanent linear change (CT-30℃x24h)%

0.5

0.5

0.6

0.4

0.5

0.9

0.9

Reversible thermal expansion at 1100℃

0.5

0.5

0.6

0.7

0.8

0.9

1.1

Thermal conductivity (W/m.k)

400 ℃

0.12

0.12

0.14

0.27

0.32

0.41

0.49

600 ℃

0.14

0.14

0.16

0.29

0.34

0.43

0.5

800 ℃

0.16

0.17

0.18

0.31

0.36

0.44

0.51

1000 ℃

0.18

0.19

0.2

0.33

0.38

0.45

0.53

1200 ℃

-

-

-

0.3

0.41

0.47

0.56

Chemical Analysis(%)

Al2O3

37

37

44.5

58

67

73

77

Si02

47

44.4

41.2

39.1

31

25.1

21.5

Fe2O3

0.7

0.7

0.7

0.7

0.6

0.5

0.4

Common size of insulation brick

230x114x65/75mm or customized size