High refractoriness.
Good spalling resistance and wear resistance.
Good corrosion resistance.
Good thermal shock resistance.
High mechanical strength.
High-temperature creep rate is low.
Good volume stability at high temperature.
Specification:
| Index | High Alumina Brick for Blast furnace | ||
| LZ-75 | LZ-65 | LZ-55 | |
| Al2O3, % ≥ | 75 | 65 | 55 |
| Fe2O3,% ≤ | 2.0 | 2.0 | 2.0 |
| Refractoriness,°C≥ | 1790 | 1790 | 1770 |
| Liner change on reheating(1500°C*2h) | 0~-0.2 | 0~-0.2 | 0~-0.2 |
| 0.2Mpa Refractoriness under load, °C≥ | 1520 | 1500 | 1480 |
| Apparent porosity, % ≤ | 19 | 19 | 19 |
| Cold crushing strength, ≥ | 70.0 | 58.8 | 49.0 |
|
Item
|
DL-80
|
DL-75
|
BDL-80
|
BDL-75
|
|
Al2O3, %
|
80
|
75
|
80
|
75
|
|
A.P.%
|
19(21)
|
19(21)
|
18(20)
|
18(20)
|
|
P.L.C. 1500 X 2h
|
0-0.3
|
0-0.3
|
±0.2
|
±0.2
|
|
CCS MPa
|
75
|
65
|
60
|
55
|
|
Load softening temperature
|
1530
|
1520
|
1530
|
1520
|
|
Thermal Shock (1100water cooling)
|
Issue actual value
|
8
|
8
|
|
