Big grid surface fireclay bricks for hot-blast furnace
|
index |
Fire-clay | ||
|
item |
RN-42 |
RN-40 |
RN-36 |
|
AL2O3 %≥ |
42 |
40 |
36 |
|
Refractoriness，℃ |
1750 |
1730 |
1700 |
|
0.2MPArefractoriness under load，℃≥ |
1400 |
1350 |
1300 |
|
Permanent linear change after heating， %1500℃*2h
1450℃*2h
1350℃*2h |
-0.4 |
- |
- |
|
|
|
| |
|
- |
-0.3 |
-0.5 | |
|
Apparent porosity %≤ |
24 |
24 |
26 |
|
Cold Crushing Strength，MPa≥ |
29.4 |
24.5 |
19.6 |