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High alumina bricks used for roof of electric furnace for steelmaking
Counter 268   Addtime：2006-07-27 19:19:41
Brand
DL-80
DL-75
BDL-B
BSL-A
Item
Al2O3 % 
80
75
65
75
Refractoriness ℃ 
1790
1790
1790
1790
0.2MPa RUL ℃
1550
1530
1580
1630
Liner（1550 ℃*2h）%
0~-0.3
0~-0.4
0~-0.4
0~-0.3
Apparent porosity %
19
19
19
18
Cold crushing strength MPa 
78.5
68.5
65
70
Thermal shock（1100℃，water）
30
25

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