Insulating Bricks of Hot And Cold Face Grades
INSULATING BRICKS (IS-2042)
| Properties | Grade A [JRI-A] | Grade B [JRI-B] | Grade C [JRI-C] |
|---|---|---|---|
| Bulk Density (gm/cc, max.) | 1.00 | 0.90 | 0.75 |
| Apparent Porosity (%, min.) | 60 | 60 | 65 |
| Cold Crushing Strength (kg/cm2, min.) | 20 | 15 | 7 |
| Pyrometric Cone [ASTM] No. (min.) | 32 | 27 | |
| Suitable for temperatures up to (ºC) | 1500 | 1250 | 850 |
| Thermal Conductivity at Hot Face temperature of 600ºC (kcal/m/hr/ºCmax) | 0.35 | 0.23 | 0.20 |
| PLCR (ºC/3 hours, max.) | ±1.5 at 1250ºC | ±1.5 at 1200ºC | ±1.5 at 1000ºC |
MICA INSULATING BRICKS
| Properties | Grade A [JRMI-A] | Grade B [JRMI-B] | Grade C [JRMIC] | |
|---|---|---|---|---|
| Bulk Density (gm/cc) | 0.475 ~ 0.530 | 0.570 ~ 0.630 | 0.700 | |
| Apparent Porosity (%, min.) | 80 | 75 | 72 | |
| Cold Compressive Strength (kg/cm2min) | 7 | 9 | 12 | |
|
Thermal Conductivity (kcal/m/hr/ºC, max.) |
400ºC | 0.11 | 0.14 | 0.16 |
| 600ºC | 0.14 | 0.16 | 0.175 | |
| 800ºC | 0.16 | 0.175 | 0.19 | |
| PLC (% at ºC for 5 hours) | -1.5 at 950ºC | -1.5 at 1000ºC | ||
| Maximum Safe Working TemperatureºC | 1000 | 1050 | 1050 | |
| Al2O3 (%) | 36 | |||
| SiO2 (%) | 48 | |||
| Fe2O3 (%) | 2 | |||
NOTE :
- Provided above are average test data, subject to reasonable variations
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