Index

Item

Fired high alumina
brick for electric furnace top  Fired

Non fired high alumina brick
 for electric furnace top Unfired

YDL－80

DL－80

DL－75

BDL－80

BDL－75

Al2O3, %

≥80

≥80

≥75

≥80

≥75

Refractoriness，℃，

≥1790

/

/

≥1780

≥1780

Apparent porosityAP％

Top brick

20

19

19

18

18

Arch angle brick

22

21

21

20

20

Normal temperature
compressive strengthCCS，Mpa

≥75

≥75

≥65

≥60

≥55

0.2MPa load softening
start temperature rul, ℃

≥1550

≥1530

≥1520

≥1530

≥1520

Change rate of reheating
linePLC（1500℃×2h），％

0.2～－0.3

0.2～－0.4

0.2～－0.4

/

/

Thermal shock stability
(1100 ℃ water cooling), secondary cycle, ≥

≥10

/

/

≥8

≥8