|
物品 |
N-1 |
N-2a |
N-2b |
N-3a |
N-3b |
N-4 |
N-5 |
N-6 |
||
|
难治性 |
SK |
31 |
30 |
30 |
29 |
29 |
28 |
27 |
23 |
|
|
℃ |
1750 |
1730 |
1730 |
1710 |
1710 |
1690 |
1670 |
1580 |
||
|
化学成分 |
Al 2 O 3 ≥ |
40 |
39 |
34 |
34 |
32 |
32 |
31 |
31 |
|
|
Fe 2 O 3 ≤ |
2.1 |
2.1 |
2.3 |
2.3 |
2.5 |
2.5 |
2.5 |
2.5 |
||
|
表观孔隙率% ≤ |
22 |
24 |
26 |
24 |
26 |
24 |
26 |
28 |
||
|
堆积密度 g/ cm³ ≥ |
2.15 |
2.10 |
2.10 |
2.05 |
2.05 |
2.05 |
2.00 |
2.00 |
||
|
冷压强度(兆帕) ≥ |
30 |
25 |
20 |
20 |
15 |
20 |
15 |
15 |
||
|
0.2MPa耐火度,负载温度T≥0.6 ℃ |
1400 |
1350 |
1350 |
1320 |
1320 |
1300 |
1300 |
1300 |
||
|
再加热线性变化(% ) |
1400℃ 2小时 |
+0.1- -0.4 |
+0.1- -0.5 |
+0.2- -0.5 |
|
|
|
|
|
|
|
1350℃ 2小时 |
|
|
|
+0.2- -0.5 |
+0.2- -0.5 |
+0.2- -0.5 |
+0.2- -0.5 |
|||