Dry Pressed Insulating Refractory Brick Kiln Fired Clay Bricks Low Porosity Fireclay Bricks
Product Description of Dry Pressed Insulating Refractory Brick Kiln Fired Clay Bricks Low Porosity Fireclay Bricks
Fireclay bricks are a type of refractory brick made from aluminum silicate materials. They have an alumina content of 30-40% and a melting point of up to 1690-1730 degrees Celsius. Fireclay bricks are made from kaolinite (Al2O3·2SiO2·2H2O) as the main mineral composition, with impurities of 6-7%, including potassium, sodium, calcium, titanium, and ferrous oxide. Fireclay bricks are classified as slightly acidic refractory materials that can resist acid slag and gas erosion.
Standard sizing: 230 x 114 x 65 mm others up to the client
| Item/Grade | Fire clay brick | High alumina brick | ||||||
| SK-30 | SK-32 | SK-34 | SK-35 | SK-36 | SK-37 | SK-38 | SK-40 | |
| AL2O3% (≥) | 30 | 35 | 38 | 45 | 55 | 65 | 70 | 82 |
| Fe2O3% (≤) | 2.5 | 2.5 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| Refractoriness(SK) | 30 | 32 | 34 | 35 | 36 | 37 | 38 | 40 |
| Refractoriness under load, 0.2MPa, °C (≥) | 1250 | 1300 | 1360 | 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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