fused cast skid rail block fire brick

( % )Chemical Composition

SiO2

19

Al2O3

73

Na2O

1.0

ZrO2

5.5

Others

1.5

Physical Properties

-

True density(g/cm3)

3.54

Cold crushing strength(Mpa)

>350

(%)Thermal expansion rate(%) 1150°C

0.8

Thermal Conductivity(500-1500°C)

4.6w/m.0k

Porosity

<4%

Bulk density (g/cm3)

PT

≥3.0

WS

≥3.2

Crystalline hpase composition( % )

-

Corundum

38%

Porzite

40%

Glass phase

17%

Baddeleyite

5%