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1.Product description of light weight silica insulation brick
Silica insulating refractory brick has SiO2 content of more than 90% and bulk density of less than 1.2g/cm ³ Thermal insulating silica refractory products. The mineral composition of siliceous insulating refractory bricks is 78%~86% phosphorous quartz, 13%~15% cristobalite and 4%~7% quartz.
2.Advantages of light weight silica insulation brick
- High porosity.
- Small bulk density.
- Good insulation effect.
- High mechanical strength.
- Low thermal conductivity.
3.Parameters of light weight silica insulation brick
| Item | QG-1.0 | QG-1.1 | QG-1.2 |
| SiO2 % | 91 | 91 | 91 |
| Refractoriness°C | 1680 | 1680 | 1670 |
| 0.2Mpa Refractoriness Under Load °C | 1480 | 1560 | 1560 |
| Cold Crushing Strength Mpa | 3.5 | 3.5 | 3.5 |
| True Density g/cm3 | 2.39 | 2.39 | 2.39 |
| Bulk Density g/cm3 | 1 | 1.1 | 1.2 |
| Permanent Linear Change On Reheating(%) | 0~+0.5 1450°CX2h | 0~+0.5 1550°CX2h | 0~+0.5 1550°CX2h |
| Thermal Conductivity (W/MK) 350°C | 0.55 | 0.6 | 0.65 |