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Brief introduction of thermal insulation silicon brick
Thermal insulation silicon brick refers to the lightweight refractory material with silica above 91% and volume density below 1.2g/cm3. It is generally made of crystalline quartzite or silica sand as raw material, and flammable substances are added to the ingredients, such as coke, anthracite, sawdust, carbonized rice husk or porous structure is formed by gas foaming method.
Advantages of thermal insulation silicon brick
- High porosity
- Low volume density
- Good heat insulation
- Good thermal shock resistance
Thermal insulation silicon brick index
| 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 |
Application of thermal insulation silicon brick
Thermal insulation silicon brick is mainly used for heat insulation or reduce weight without direct contact with the molten material, not erosive gas action, do not suffer from temperature changes in various parts of the kiln.