Characteristics of this series products are as follow:
The brick is made from sintered special grade clay, pressed by high pressure and sintered at high temperature, with excellent spalling resistance, alkali,sodium,sulfur,chlorine and alkalic salt corrosion. Low thermal conductivity, a better and ideal choice for steel industry.
| Items | Fireclay brick | High alumina brick | ||||||
| SK30 | SK32 | SK34 | SK35 | SK36 | SK37 | SK38 | SK40 | |
| Al2O3,% ≥ | 30 | 32 | 38 | 45 | 55 | 65 | 70 | 82 |
| Fe2O3,%≤ | 2.5 | 2.5 | 2 | 2 | 2 | 2 | 2 | 2 |
| Refractoriness,SK | 30 | 32 | 34 | 35 | 36 | 37 | 38 | 40 |
| Refractoriness,ºC | 1670 | 1710 | 1750 | 1770 | 1790 | 1820 | 1850 | 1920 |
| Refractiriness under load,0.2Mpa | 1250 | 1350 | 1370 | 1420 | 1450 | 1480 | 1530 | 1600 |
| Apparent porosity,% ≤ | 22-26 | 20-24 | 20-22 | 18-20 | 20-23 | 20-23 | 20-22 | 18-20 |
| Bulk density,g/cm3 | 1.9-2.0 | 1.95-2.1 | 2.1-2.2 | 2.15-2.22 | 2.25-2.4 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength,Mpa ≥ | 20 | 25 | 30 | 40 | 45 | 50 | 60 | 70 |
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