Brand

Item

Caly

Alumina 

Mullite

Corundum- mullite

Al2O3 % min

40

50

70

80

Max Service Temperature

(°C)

1200

1300~1400

1400~1600

1600~1800

Bulk Density

(g/cm3)

0.9~1.2

0.8~1.1

1.5~1.8

1.7~2.0

Cold Crush Strength

(Mpa, min)

3.0

5.0

20

20

Refractoriness under load 0.2Mpa 

T0.6 (℃ min)

1260

1420

1650

1700

Thermal conductivity

(1000℃, W/M?K max)

0.6

0.6

1.0

1.0

Thermal shock resistance

(water cooling, times min)

30

40

50

50

Liner Change on Reheating

(%)

1250℃ X 3h

±0.5

1400℃ X 3h

±0.5

1500℃ X 3h

±0.3

1500℃ X 3h

±0.3