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INSULATING BRICKS:
| Produts | NA INS - 110 | NA INS - 135 |
NA INS - 140
|
NA INS - 500
|
NA INS - 650
|
NA INS - 700
|
NA INS - 750
|
CHEMICAL:
| Sio2(%) | 69.7 | 61.5 | 54.1 | 49.14 | 38.92 | 35.4 | 41.32 |
| Al2 O3 (%) | 24.3 | 33.2 | 41.5 | 43.8 | 53.7 | 55.70 | 51.2 |
| Fe2 O3 (%) | 2.2 | 1.9 | 1.8 | 0.95 | 1.38 | 1.40 | 1.26 |
| Tio2 (%) | 2.0 | 2.5 | 1.9 | 1.75 | 2.6 | 2.80 | 2.5 |
| CaO + Mgo (%) | 0.5 | 0.3 | 0.2 | 3.6 | 2.08 | 3.65 | 2.17 |
| Others (%) | 0.9 | 0.6 | 0.5 | 0.76 | 1.32 | 1.05 | 1.55 |
| Max. Service Temp. (°C) | 1000 | 1350 | 1400 | 1300 | 1430 | 1400 | 1430 |
| Nature of Bond | Ceramic | ceramic | ceramic | ceramico |
Ceramico Ceramic |
Ceramico Ceramic |
Ceramico Ceramic |
| Raw Material Base |
Fire Clay & Mica |
Fire Clay & Kyanite | Fire Clay & Kyanite | Synrhetic Alumina |
Synthetic Alumina |
Synthetic Alumina |
Synthetic Alumina |
PHYSICAL:
| Rawersible Thermal | 0.50 | 0.50 | 0.55 | 0.55 | 0.55 | 0.55 | |
| Expansion ( % at 1000°c) | |||||||
| BD ( gm/cm3)max | 0.90 | 1.05 | 1.0 | 0.55 | 0.65 | 0.80 | 0.80 |
| AP (%) Min. | 60 | 55 | 55 | - | - | - | - |
| CCS (kg/cm2)Min. | 10 | 25 | 25 | 7 | 25 | 13 | 40 |
| PCE (orton) Min. | 20 | 29 | 30 | 23 | 30 | 30 | 31 |
| PLC (%) Max. | ±1.5 at 1000°c/5hr | ±1.5 at 1350 °c/5hr | ±1.5 at 1400 °c/5hr | ±1.5 at 1300°c/5hr | ±1.5 at 1430 °c/5hr | ±1.5 at 1400 °c/5hr | ±1.5 at 1430 °c/5hr |
| Thermal Conductivity(Kcal/m/hr/°C) | |||||||
| 300 °C- | 0.24 | 0.26 | 0.17 | 0.21 | 0.20 | 0.21 | |
| 500 °C- | 0.26 | 0.29 | 0.18 | 0.23 | 0.23 | 0.24 | |
| 800 °C- | 0.28 | 0.21 | 0.21 | 0.26 | 0.27 | 0.28 | |
| Wt. of std. Bricks (approx.) (kg.) (230x114x76mm) | 1.70 | 2.10 | 2.00 | 1.10 | 1.30 | 1.50 | 1.60 |
| Application area | Backup Lining fo Boiler reheating furnace | Backup Glass tank furnace, Blast furnace. | Backup Glass tank furnace, Blast furnace. | As a backup Lining for special application | As a backup Lining for special application | As a backup Lining for special application | As a backup Lining for special application |