Using silica fume (microsilica), quartz and lime as raw material, synthesized through dynamic hydrothermal process, reinforced with glass fibre and paper fibre and formed by press. Amorphous silica fill up interspace between xonotlite crystal, it increases fire-resistance temperature, mainly for back-up insulation of all refractory constructions.
Chemical Analysis:
| SiO2 | : | 47 – 48 % |
| CaO | : | 44 – 45 % |
| Al2O3 | : | 0.30 – 0.40 % |
| MgO | : | 0.5 – 0.7 % |
| Fe2O3 | : | 0.30 – 0.40 % |
| Ignition Loss | : | 6 – 7 % |
Physical Properties:
| Item | Density 230 | Density 250 | Density 270 |
Density 300 |
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| Bulk density | kg/m3 |
230 ±10% |
250
±10% |
270
±10% |
300 ±10% |
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| Flexural Strength | MPa | ≥0.45 | ≥0.50 | ≥0.55 | ≥0.60 | ||||
| Compressive Strength | MPa | ≥0.8 | ≥0.9 | ≥1.0 | ≥1.1 | ||||
| Thermal Conductivity |
W/m.k |
200oC 0.085 400oC 0.100 600oC 0.152 800oC 0.214 |
200oC 0.095
400oC 0.108 600oC 0.156 800oC 0.216 |
200oC 0.098
400oC 0.110 600oC 0.158 800oC 0.218 |
200oC 0.102 400oC 0.116 600oC 0.164 800oC 0.226 |
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| Service Temp.Limit | oC | 1100 | 1100 | 1100 | 1100 | ||||
Advantages:
- Low thermal conductivity
- High thermal resistance
- Low thermal shrinkage
- Low bulk density
- Protective gas-resistant (CO, NH3, H2, N2 and CH4)
- Free of sulphur and low in iron
Application area:
- Steel industry: smelting, heat distortion and heat-treatment plants
- Ceramic industry: chamber and tunnel furnaces
- Glass industry: melting furnaces and cooling channels
- Cement industry: heat exchangers and cyclone separators
- Chemical and petrochemical industry: Thermal cracking reactors and processing plants
For further information, you can contact our Sales Engineer, or you can contact us directly or here.