1. Good slag-resistance.
2. Good corrosion resistance.
3. Excellent thermal shock resistance.
Features:
1.Silica over91%, bulk density below1.2g/cm3
2.Compressive strength, slag-resistance, corrosion resistance lower than ordinary silica brick.
3.Thermal shock resistance increases.
4.Raw material silica, morethan 90%,0.5-1.0mm. Add flammable substances to the mixture or using gas evolution method to form porous structure,fired.
Application:
1.Used as insulation bricks, net direct contact with melting materials.
2.Max using temperature can reach1200 ~ 1550°C, widely applied in glass melting furnace.
Phycal and chemical index:
Item | Properties | |||
QG-1.2 | QG-1.1 | QG-1.0 | ||
SiO2,% | 91 | 91 | 91 | |
Refractoriness,°C | 1670 | 1680 | 1680 | |
Softening temperature under load,°C, | 1560 | 1560 | 1480 | |
Cold Crushing strength MPa, | 3.5 | 3.5 | 3.5 | |
True density,g/cm3 | 2.39 | 2.39 | 2.39 | |
Bulk density,g/cm3 | 1.2 | 1.1 | 1.0 | |
W/(m·k)350±25°C), Coefficient of thermal conductivity W/(m·k)average temperature 350±25°C) | 0.65 | 0.6 | 0.55 | |
Permanent linear change,%, | 1550°CX 2 H | 0.5 | 0.5 | — |
1450°CX 2 H — | — | 0.5 | ||
Application | All industrial furnace | |||
