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High-alumina refractory |
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High-alumina refractory product is mainly used as thermal furnace lining for electric furnace roof, blast furnace, hot-air furnace, molten steel ladle, torpedo, cement kiln and glass furnace. |
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High-alumina brick for general use |
Performance index |
Item |
Index |
LZ-75 |
LZ-65 |
LZ-55 |
LZ-48 |
Al2O3 %
No less than |
75 |
65 |
55 |
48 |
Refractoriness ¡æ |
No less than |
1790 |
1770 |
1750 |
0.20MPa Refractoriness under load ¡æ |
1520 |
1500 |
1470 |
1420 |
Reheating linear change % |
1500 ¡æ£¬2h |
+0.1
-0.4 |
¡ª |
1450 ¡æ£¬2h |
¡ª |
+0.1
-0.4 |
Apparent porosity% No more than |
23 |
22 |
Cold crushing strength£¬MPa No less than |
53.9 |
49.0 |
44.1 |
39.2 |
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High-alumina brick for blast furnace |
Performance index |
Item |
Index |
GL-65 |
GL-55 |
GL-48 |
Al2O3 %
No less than |
65 |
55 |
48 |
Fe2O3 %
No more than |
2.0 |
Refractoriness£¬Cone number |
180 |
178 |
176 |
0.20MPa Refractoriness under load ¡æNo less than |
1500 |
1480 |
1450 |
Reheating linear change % |
1500 ¡æ£¬2h |
0
-0.2 |
¡ª |
1450 ¡æ£¬2h |
¡ª |
0
-0.2 |
Apparent porosity£¬ %
No more than |
19 |
18 |
Cold crushing strength£¬ MPa No less than |
58.8 |
49.0 |
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High-alumina brick for hot-air furnace |
Performance index |
Item |
Index |
RL-65 |
RL-55 |
RL-48 |
Al2O3 %
No less than |
65 |
55 |
48 |
Refractoriness ¡æ
No less than |
1780 |
1760 |
1740 |
0.20MPa Refractoriness under load¡æ
No less than |
1500 |
1470 |
1420 |
Reheating linear change % |
1500 ¡æ£¬2h |
+0.1
-0.4 |
¡ª |
1450 ¡æ£¬2h |
¡ª |
+0.1
-0.4 |
Apparent porosity %
No more than |
22 |
Cold crushing strength MPa
No less than |
50 |
45 |
40 |
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High-alumina brick for electric furnace roof |
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Item |
Index |
DL-80 |
DL-75 |
BDL-80 |
BDL-75 |
Al2O3 %
No less than |
80 |
75 |
80 |
75 |
Refractoriness¡æ
No less than |
- |
1780 |
1780 |
0.20MPa Refractoriness under load ¡æ
No less than |
1530 |
1520 |
1530 |
1520 |
Reheating linear change % 1500 ¡æ£¬2h |
0.2¡ª-0.4 |
¡ª |
Apparent porosity % |
Dome brick
No more than |
19 |
18 |
Skew brick
No more than |
21 |
20 |
Cold crushing strength MPa
No less than |
75 |
65 |
60 |
55 |
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High-alumina brick for molten steel ladle |
Performance index |
Item |
Index |
CL-55 |
CL-65 |
CL-75 |
CL-80 |
PZCL-78 |
Al2O3 %
No less than |
55 |
65 |
75 |
80 |
78 |
Fe2O3 %
No more than |
- |
- |
- |
2.0 |
2.0 |
0.20MPa Refractoriness under load ¡æ
No less than |
1470 |
1490 |
1510 |
1530 |
1550 |
Reheating linear change % |
1450 ¡æ£¬2h |
0.1¡ª0.5 |
- |
- |
- |
¡ª |
1500 ¡æ£¬2h |
- |
0.1¡ª0.5 |
0.1¡ª0.5 |
- |
- |
1550 ¡æ£¬2h |
- |
- |
- |
0.1¡ª0.5 |
0.4¡ª0.3 |
Apparent porosity %
No more than |
22.0 |
28.0 |
28.0 |
24.0 |
21.0 |
Cold crushing strength MPa No less than |
45 |
35 |
40 |
50 |
70 |
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High-alumina brick for casting steel in molten steel ladle |
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| Item |
Index |
SL-48 |
KL-48 |
XL-48 |
ZL-48 |
Al2O3 % No less than |
48¡ª55 |
Refractoriness£¬Cone number |
176 |
0.20MPa Refractoriness under load¡æ
No less than |
1450 |
¡ª |
1400 |
Reheating linear change % 1450 ¡æ£¬2h |
- |
0.1¡ª-0.4 |
Apparent porosity % |
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18-24 |
¡Ü24 |
18-24 |
¡Ü25 |
Cold crushing strength MPa
No less than |
¡ª |
19.6 |
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Phosphate bonded alumina brick |
Performance index |
Item |
Index |
P |
PA |
Al2O3 %
No less than |
75 |
77 |
Fe2O3 %
No more than |
3.2 |
3.2 |
CaO %
No more than |
0.6 |
0.6 |
Cold crushing strength MPa
No less than |
70 |
75 |
Bulk density£¬kg/m3 |
No less than |
2700 |
2750 |
Refractoriness under load T0.6, ¡æ |
1350 |
1300 |
Refractoriness ¡æ
No less than |
1780 |
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Performance index |
| Item |
Indicators |
| Al2O3 %
No less than |
91 |
| SiO2 % No more than |
8.5 |
| Fe2O3+TiO2+Na2O+K2O % No more than |
0.4 |
| Leaner reheat change % 1600 ¡æ£¬2h |
-0.5¡ª0 |
| Apparent prosity %No more than |
16 |
| Bulk density g/cm3
No less than |
2.97 |
| Cold crushing strength MPa
No less than |
110 |
| Refractoriness under load¡æ |
1650 |
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