Silica Insulating Brick for Insulation Layers of Industrial Furnaces

Silica insulation brick refers to a kind of refractory products made from silica as the main material .The main mineral composition of silica insulation brick is phosphorite and cristobalite.It has high refractoriness under load and low thermal conductivity.Silica insulation bricks are suitable for industrial furnaces such as coke ovens, hot blast furnaces, glass furnaces, and carbon furnaces.

Item		LWS-1.2	LWS-1.0	LWS-0.8	LWS-0.6
SiO2 (%)		92	92	90	89
Fe2O3 (%)		0.60	0.57	0.52	0.62
CaO (%)		2.5	2.7	3.0	3.3
Bulk Density (g/cm³)		1.2	1.0	0.8	0.6
Cold Crushing Strength (MPa)		5.0	4.5	3.0	2.5
Refractoriness (℃)		1640	1620	1610	1600
Linear Change (%)		1480℃*2h±0.5	1450℃*2h±0.5	1400℃*2h±0.5	1350℃*2h±0.5
Thermal Conductivity (W/m.k)	400℃	0.36	0.30	0.26	0.22
	600℃	0.39	0.33	0.29	0.25
	800℃	0.41	0.36	0.31	0.28
	1000℃	0.44	0.39	0.34	0.31