High Alumina Bricks

Item

Properties

HA-80

HA-75

HA-65

HA-55

HA-48

Al2O3 (%)

80

≥75

≥65

≥55

≥48

Refractoriness  (°C )

≥1790

≥1790

≥1790

≥1770

≥1750

Bulk density  (g/cm3)

2.65

2.5

2.45

2.4

2.3

Softening temperature under load  (°C )

1530

≥1520

≥1500

≥1470

≥1420

Linear changes on reheating (%)

1500°CX2H

0.1

0.1

0.1

0.1

0.1

1450°CX2H

-0.4

-0.4

-0.4

-0.4

-0.4

Apparent porosity (%)

22

≤23

≤23

≤22

≤22

Cold crushing strength (Mpa)

55

≥50

≥45

≥40

≥35

Application

steel furnace, glass furnace, sodium silicate furnace, ceramic shuttle kiln, cement rotary kiln, blast furnace, electric furnace, blast furnace and reverberatory furnace.