牌号              项目

LDRL-155

LDRL-150

LDRL-145

LDRL-140

LDRL-135

Al2O3,  %                                    ≥

72

70

65

65

60

Fe2O3,  %,                                  ≥

0.8

0.8

0.8

1.0

1.0

显气孔率,  %                             ≤

19(21)

19(21)

19(21)

19(22)

19(23)

耐火度,   ℃                             ≥

1830

1830

1790

1790

1790

耐压强度,  MPa                        ≥

70(60)

70(60)

70(50)

60(50)

60(50)

0.2MPa荷重软化温度, ℃     ≥

1700

1650

1630

1600

1580

重烧线变化(1500℃x 5h),      %

±0.2

+0.2

+0.2

±0.2

±0.2

热震稳定性(1100℃,水冷),      次

35

30

30

20

15

蠕变率, %                                      ≤

0.6

0.6

0.6

0.8

0.8

1550℃x50h

1500℃x50h

1450℃x50h

1400℃x50h

1350℃x50h