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CWK-3
CWK-3 High-alumina brick is unique high-alumina refractory which is made of electro-fused
aggregates. This product has low-porosity with high creep resistance and have
excellent alkali corrosion resistance. This is suitable for melting crowns and
superstructure of borosilicate glass furnaces, flue linings of recuperators, canal
ceiling and other superstructures which are prone to damage by alkaline vapour. |
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CWR-6
CWR-6 High-alumina brick has high spalling resistance and heat resistance. This
product is used for parts that require stronger heat resistance than SK-34, such
as superstructures of melters, recuperator furnaces and flue linings. |
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| Product |
CWK-3 |
CWR-6 |
| Chemical composition(%) |
SiO2 |
25 |
37 |
| Al2O3 |
69 |
58 |
| Fe2O3 |
1.5 |
1.5 |
| TiO2 |
1.1 |
2.0 |
| CaO+MgO |
0.2 |
0.3 |
| Physical properties |
Refractoriness(SK) |
37 |
36 |
| Apparent specific gravity |
3.13 |
2.94 |
| Bulk specific gravity |
2.62 |
2.30 |
| Porosity(%) |
17 |
23 |
| Compressive strength(MPa) |
100 |
55 |
Permanent linear change on reheating
(%,1,500°Cx2hr) |
0 |
-0.1 |
Thermal expansion
(%, at1,000°C) |
0.45 |
0.44 |
| Refractoriness under load(T2,°C) |
1590 |
1470 |
| Thermal conductivity(W/(m·K)) |
600°C |
1.7 |
1.4 |
| 1,000°C |
1.9 |
1.5 |
| Weight calculation rate |
2.6 |
2.3 |
| Typical applications |
Crown and superstructure in boro-silicate
glass tank furnace,
Flue lining |
Superstructure backup in melter,
Flue lining |
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