Verified Company
Zibo Hitech Material Co., Ltd.
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Fireclay brick
IndexProduct | N-1 | JN-40 | JN-42 | |
Al2O3 % | ≥42 | ≥40 | ≥42 | |
Fe2O3 % | ≤2.3 | ≤2.7 | ≤2.5 | |
Refractoriness °C | 1760 | 1760 | 1760 | |
Bulk density g/cm3 | 2.25 | 2.20 | 2.25 | |
Apparent porosity % | ≤22 | ≤24 | ≤23 | |
Refractoriness under load 0.2MPa°C | 1400 | 1380 | 1450 | |
Cold crushing strength MPa | 35 | 28 | 35 | |
Permanent linear chang % | 1500°C×2h | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 |
The fireclay brick for tunnel kiln is used in high temperature insulation layer of tunnel kiln that has high refractoriness
and good thermal shock resistance.
High quality of firecaly bricks for tunnel kiln can be used as the linings that directly contact the fire however it can not
be used in the place where eroded by slag directly. Because the firecaly brick is of good stability under reduction
condition it is widely used as the inner insulation layer in the tunnel kiln that protected by hydrogen or carbon
monoxide atmosphere.