Refractory bricks is dense shaped refractory material.with high refractoriness and mechanical behavior under high temperature, refractory bricks is the nacessary material of high-temperature services, mainly used for industrial furnaces and kinls and several thermal equipments.
1. Main Characters: Refractoriness for the high alumina bricks for coke oven is 1750-1790C, refractoriness under load is normally above 1420~1550C. The brick has good erosion resistance to acid and alkali slag but the thermal shock resistance it not good.
2. Applications: High alumina brick for coke oven are used in the oven head of combustion zone, bottom of carbon zone. They can not be used in wall bricks of carbon zone.
3. Physical and Chemical Index
Index |
Item |
|||
GL-65 |
GL-55 |
GL-48 |
||
Al2O3 ,%≥ |
65 |
55 |
48 |
|
Fe2O3 ,%≤ |
2.0 |
|||
Refractoriness C |
1790 |
1770 |
1750 |
|
0.2Mpa refractoriness under load ,C≥ |
1500 |
1480 |
1450 |
|
|
1500C,2h |
0 |
- |
|
1450C2h |
- |
0 |
||
Apparent porosity, %≤ |
19 |
18 |
||
Compress strength, Mpa≥ |
58.8 |
49.0 |
||
Ventilative |
It must be tested and list the actual measuring data in the quality Certification. |