　　Silicious heat-insulating and fire-resistant brick is a product made by mixing bleaching beads, silicon powder and binder in a certain ratio, and then pressing and molding, and firing at high temperature. According to the physical and chemical indicators are divided into GGR-1.0, GGR-1.1, GGR-1.15, GGR-1.2 four brands. Mainly used for heat preservation of glass industry kiln, saving energy and reducing consumption.

Physical and chemical indicators:

Item	Indicator
Item	GGR-1.0	GGR-1.1	GGR-1.15	GGR-1.2
SiO2 % ≥	91	91	91	91
Bulk Densityg/cm³ ≤	1.0	1.1	1.15	1.2
Compressive strength at room temperature Mpa ≥	2.0	3.0	5.0	5.0
Reburning line change% ≤	1450℃×2h 0.5	1450℃×2h 0.5	1550℃×2h 0.5	1550℃×2h 0.5
Thermal Conductivity【W/(m·K)】average temperature（350±10）℃ ≤	0.55	0.60	0.65	0.70

Lightweight silica brick

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