Product Introduction:
High alumina brick refers to refractory products with Al2O3 content higher than 48%.It is made of bauxite or other raw materials of high alumina content .The refractoriness of high alumina brick can be more than 1770℃ .
According to the content of Al2O3, high alumina bricks are usually divided into three grades: Grade I──Al2O3 content>75%; Grade II──Al2O3 content is 60～75%; Grade III──Al2O3 content is 48～60%.
Features:
1. Low creep.
2. Good slag resistance.
3. Strong thermal shock stability.
4. Good erosion resistance.
Application:
High alumina bricks are mainly used for lining blast furnaces, hot blast furnace, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kilns.
Technical Properties:
Item | FLZ-48 | FLZ-65 | FLZ-70 | FLZ-75 | FLZ-80 | FLZ-85 |
Al2O3 / % | ≥48 | ≥65 | ≥70 | ≥75 | ≥80 | ≥85 |
Apparent Porosity / % | 22(24) | 24(26) | 24(26) | 24(26) | 21(23) | ≤19 |
Cold Crushing Strength / MPa | 40(35) | 50(40) | 55(45) | 60(50) | 70(60) | ≥70 |
0.2MPa Refractoriness Under Load / ℃ | 1420 | 1500 | 1510 | 1520 | 1530 | 1700 |
Linear Change on Reheating / % | 1450℃*2h | 1500℃*2h | 1600℃*2h |
-0.4-0.1 | -0.4-0.2 | ±0.1 |
