指标 Spec

牌号 Brand

一般高铝砖Normal high-alumina firebricks

电炉顶砖
Electric furnace roofing brick

高炉砖
Blast furnace brick

BHA-1

BHA-2

BHA-3

BHT-80

BHT-75

BHB-75

BHB-48

Al₂O₃ % min

75

65

48

80

75

65

48

Fe₂O₃ % max

-

-

-

-

-

2.0

2.0

耐火度Refractoriness, ≥ °C

1790

1750

0.2 MPa荷重软化温度softening temperature under load 0.2 MPa, ≥ °C

1520

1500

1420

1550

1530

1500

1450

显气孔率Apparent porosity, ≤ %

23

23

22

21

21

19

18

重烧线变化Linear change on reheating at 1450°C x 2 hours, °C

+0.1
-0.4

+0.1
-0.4

+0.1
-0.4

0
-0.3

0
-0.4

0
-0.2

0
-0.2

常温耐压强度
cold crushing strength, MPa

53.9

49.0

39.2

78.5

68.6

58.8

49.0