For High alumina brick the temperature of refractoriness under load is normally above 1420~1550℃ that is higher than the fireclay brick and it increases along with the AL2O3 content enhances.
For High alumina brick the thermal Shock resistance is mainly decided by chemical contents and its mineral microstructure but its thermal shock resistant is worse than the fireclay brick.
High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.
High alumina brick are used normally in industry furnaces such as Blast furnace, hot-blast furnace and EAF etc.
| Index |
Item |
LZ-75 |
LZ-65 |
LZ-55 |
LZ-48 |
Al2O3 ,%≥ |
75 |
65 |
55 |
48 |
Refractoriness, ℃≤ |
1790 |
1770 |
1750 |
0.2Mpa refractoriness under load, ℃≤ |
1520 |
1500 |
1470 |
1420 |
Reheating linear change, % |
1500℃,2h |
+0.1
-0.4 |
- |
1450℃,2h |
- |
+0.1
-0.4 |
Apparent porosity, %≤ |
23 |
22 |
Compress strength, MPa≥ |
53.9 |
49.0 |
44.1 |
39.2 |
High alumina brick packing
Bricks are packed on wooden pallet and then polyethylene film is placed over it, finally the package is tied up with steel strips.
High alumina brick order quantity
20 t as minimum quantity is accepted.
High alumina brick delivery time
30 days after receiving L/C or 30% of advanced T/T. the production capacity reach to 3000 t per month. |