Items

High Alumina Bricks

for steel ladle

Micro-expansion

for steel ladle

Burned High Alumina Bricks for the cover of electric stove

Al2O3 %          ≥

80

65

78

85

80

75

Bulkdensity  g/cm3

 ≥

2.8

2.5

2.75

2.9

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Refractoriness  ≥

1790

1790

1790

1800

1790

1790

Apparent porosity%  ≤              

21

28

19

20

21

22

Cold crushing strength≥Mpa

65

34.2

70

80

80

70

Refractoriness under

Load  ≥0.2Mpa

1530

1490

1550

1600

1550

1530

Linear changeAfter

Reheating %

 1530×2h

+0 ~ -0.4

  1500×2h

+0.1 ~ -0.5

1 1550×2h

0 ~ 0.6

  1500×2h

0 ~ 1.0

1550×2h

0 ~ -0.3

1550×2h

0.1 ~ -0.4

Items

Low Creep Bricks

Low Porosity Fireclay

Unburned Bricks

Al₂O₃ %           ≥

75

65

48

42

80

75

Fe₂O₃ %           ≤

1.7

1.7

1.8

1.5

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Apparent porosity  %    ≤

18

19

14

15

19

19

Refractoriness         ≥

1790

1790

1750

1750

1790

1790

Cold crushing strength  ≥Mpa

70

60

60

50

88

80

Refractoriness under load ≥0.2Mpa

1630

1590

1480

1450

1580

1550

Linear changeAfter reheating %

1550×2h

0 ~ -0.2

1500×2h

0 ~ -0.2

1400×2h

+0.1 ~ -0.4

1400×2h

+0.1 ~ -0.3

1550×2h

±0.3

1550×2h

±0.3

Creeping rate 0.2Mpa, ≤%

1450×2h

0.8

1400×2h

0.7

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