Brands

Items

High Al-cordierite firebricks

Mullite-cordierite firebricks

Mullite-corundum firebricks

Chemical composition %

Al₂O₃ % not less than

55

60

85-90

Fe₂O₃ % not more than

1.5

1.0

0.5

BD g/cm³ not less than

2.5

2.6

2.8

Refractoriness ℃ not less than

1730

1770

AP % not more than

22

20

20

0.2MPa RUL ℃ not less than

1450

1550

1700

CCS Mpa not less than

40

55

60

PLC %

1400℃×2h 0～-0.3

1400℃×2h ±0.1

1600℃×2h ±0.1

TSR (1100℃ water-cooling) not less than

40

55

10