The mullite insulation brick made from the wholly new ingredient, which has great performance like high temperature resistance, high intensity, low thermal conductivity and remarkable energy saving effect, can be widely used in oil cracking furnace, metallurgy stove, ceramic roller kiln, tunnel kiln, porcelain drawer kiln, glass kilns and the lining of a variety of electric furnace. This product has higher quality and lower price than other similar mullite brick abroad.

Brand index Item		HD-QM1	HD-QM2	HD-QM3	remarks
Temperature (℃)		1300	1450	1550	The size be made according to GB-3995-83 High Aluminum insulation brick
Bulk Density (g/cm3)		0.8	0.8	0.9
Compressive strength (Mpa)		1.5	1.8	2.0
Refractoriness under load (%)	0.034 Mpa	1100℃ 0.1
	0.07 Mpa		1260℃ 0.2	1320℃ 0.2
Linear change ratio after firing (%)		1300℃x 2h 0.5	1400℃x 8h 0.5	1400℃x8h 0.5
Thermal expansion at 1100℃ (%)		0.5	0.7	0.8
Chemical composition	Al2O3	43	58	65
	Fe2O3	1.2	1.0	0.8
Thermal conductivity at different temperature (w/m.k)	600℃	0.16
	800℃	0.18	0.31	0.36
	1000℃	0.2	0.33	0.38
	1200℃		0.35	0.41