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Clay refractory product |
Clay refractory product is mainly used in coke oven, blast furnace, hot-air furnace, molten steel ladle, casting product, boiler, cement kiln, glass furnace, furnace lining and thermal equipment. |
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Performance index |
Item |
Index |
N-1 |
N-2a |
N-2b |
N-3a |
N-3b |
N-4 |
N-5 |
N-6 |
Refractoriness,Cone number |
176 |
174 |
174 |
172 |
172 |
170 |
166 |
158 |
Cold crushing strength kgf/cm2
No less than |
300 |
250 |
200 |
200 |
150 |
200 |
150 |
150 |
Apparent porosity %
No more than |
22 |
24 |
26 |
24 |
26 |
24 |
26 |
28 |
2kgf/cm2 Refractoriness under load ℃
No less than |
1400 |
1350 |
- |
1320 |
- |
1300 |
- |
- |
Reheating linear change % |
1450 ℃,2h |
+0.1
-0.4 |
+0.1
-0.5 |
+0.2
-0.5 |
- |
- |
- |
- |
- |
1350 ℃,2h |
- |
- |
- |
+0.2
-0.5 |
+0.2
-0.5 |
+0.2
-0.5 |
+0.2
-0.5 |
- |
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Clay brick for blast furnace |
Performance index |
Item |
Index |
RN-42 |
RN-40 |
RN-36 |
Al2O3 %
No less than |
42 |
40 |
36 |
Refractoriness , Cone number |
176 |
174 |
170 |
Cold crushing strength MPa
No less than |
29.4 |
24.5 |
19.6 |
Apparent porosity%
No more than |
24 |
24 |
26 |
0.20MPa Refractoriness under load ℃
No less than |
1400 |
1350 |
1300 |
Reheating linear change % |
1450 ℃,2h |
0
-0.4 |
- |
- |
1350 ℃,2h |
- |
0
-0.3 |
0
-0.5 |
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Performance index |
Item |
Index |
JZN-40 |
JZN-36 |
JZN-28 |
Al2O3 %
No less than |
40 |
36 |
28 |
Refractoriness,Cone number |
172 |
170 |
166 |
Reheating linear change % 1350 ℃,2h |
+0.1
-0.3 |
Apparent porosity% |
17-25 |
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Clay lining brick for molten steel ladle |
Performance index |
Item |
Index |
CN-42 |
CN-40 |
CN-36 |
Al2O3 %
No less than |
42 |
40 |
36 |
Refractoriness, Cone number |
176 |
174 |
170 |
0.20MPa Refractoriness under load ℃
No less than |
1430 |
1400 |
1370 |
Reheating linear change % 1350 ℃,2h |
0
-0.3 |
0
-0.3 |
0
-0.3 |
Apparent porosity%
No more than |
18 |
19 |
19 |
Cold crushing strength MPa
No less than |
39.2 |
34.3 |
29.4 |
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Clay brick for casting steel in molten steel ladle |
Performance index |
Item |
Index |
SN-40 |
KN-40 |
XN-40 |
ZN-36 |
Al2O3 %
No less than |
40 |
Refractoriness, Cone number |
172 |
0.20MPa Refractoriness under load℃
No less than |
1370 |
— |
Reheating linear change % 1350 ℃,2h |
- |
0
-0.3 |
— |
Apparent porosity %
No more than |
15-23 |
≤22 |
15-25 |
≤23 |
Cold crushing strength MPa
No less than |
- |
19.6 |
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