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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.
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Product Description
The high alumina brick feature:
high alumina bricks for steel making is made from special grade of bauxite as main raw material, added with little amount of white fused alumina and a alumina powder, shaped by high pressure and sintered at high temperature. The main mineral constituent includes mullite and corundum, with excellent high temperature physical performance and chemical resistance.
| Items | High alumina brick | |||
| Al2O3,% ≥ | 55 | 65 | 70 | 82 |
| Fe2O3,%≤ | 2 | 2 | 2 | 2 |
| Refractoriness,SK | 36 | 37 | 38 | 40 |
| Refractoriness,ºC | 1790 | 1820 | 1850 | 1920 |
| Refractiriness under load,0.2Mpa | 1450 | 1480 | 1530 | 1600 |
| Apparent porosity,% ≤ | 20-23 | 20-23 | 20-22 | 18-20 |
| Bulk density,g/cm3 | 2.25-2.4 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength,Mpa ≥ | 45 | 50 | 60 | 70 |