Hard firebrick is a kind of alumina silicate brick containing 35-45%, and the refractories are SK 32-34. Brick is made of refractory clay, calcined limestone, mullite and other raw materials, with good wear resistance, peeling resistance, corrosion resistance. It has the characteristics of low porosity, high strength, heat peeling, wear resistance, creep resistance, etc., and is widely used in the lining of coke oven, glass kiln, cement rotary kiln, lime kiln, various incinerators and heating furnaces.
Features of Fireclay Brick
It has good high temperature fire resistance
Low thermal expansion at high temperatures
Low impurity content
Good thermal shock resistance
Excellent resistance to slag wear
Good cold pressing strength
Applications of Fireclay Brick
Blast Furnace
Various Incinerator
Reheating Furnace
Cement Rotary Kiln,Various Rotary Kiln
General Industrial Furnace etc.
Glass Furnace
| Description |
DN-17 |
DN14 |
DN12 |
SK34 |
SK33 |
SK32 |
| Refractoriness (SK) |
34 |
34 |
34 |
34 |
33 |
32 |
| Bulk density (g/cm3) |
2.25 |
2.34 |
2.40 |
2.20 |
2.17 |
2.15 |
| Cold Crushing Strength (MPa) |
50 |
65 |
70 |
40 |
35 |
30 |
| Apparent Porosity(%) |
17 |
14 |
12 |
23 |
24 |
26 |
| Permanent linear change @1400ºC*2hrs(%) |
±0.1~-0.2 |
±0.1~-0.2 |
±0.1~-0.2 |
±0.3 |
±0.5 |
±0.5 |
| Thermal Linear expansion @1000ºC |
0.6 |
0.6 |
0.5 |
0.6 |
0.6 |
0.6 |
| Refractoriness under Load (ºC)@0.2MPa |
1430 |
1470 |
1500 |
1350 |
1300 |
1250 |
| Chemical Analysis (%) |
Al2O3 |
42 |
45 |
46 |
42 |
38 |
35 |
| Fe2O3 |
1.7 |
1.5 |
1.3 |
2.0 |
2.2 |
3.0 |
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