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	PRODUCT：Silica brick for hot blast stove


INTRODUCE：

Varieties	Clay				Siliceous
Performance	RN-40		RN-42		RG-95
Performance	standard value	average value	standard value	average value	Arch of furnace wall	Checker brick
Refractoriness ℃	≥1730	1747	≥1750	1750
apparent porosity ％	≤24	≤21	≤24	≤22	≤22	≤22
specific gravity g/cm3					≤2.35	≤2.35
Compressive strength at room temperature Mpa	≥24.5	≥42.9	≥29.5	≥53	≥35	≥30
0.2Mpa Refractoriness under load ℃	≥1350	1390	≥1400	1420
Reheating linear change ％	1350℃×2h		1450℃×2h
creep rate 0.2Mpa×50h　％	-0.3～0	-0.02	-0.4～0	-0.02
Thermal expansion at 1000℃ ％					1550℃≤0.8　≤1.26	1550℃≤0.8 　 ≤1.26
thermal shock stability 1100times 　 Residual quartz ％	Provide data				Provide data
Chemistry　 SiO2　％ Component Al2O3　％	≥40	42.3			≥95	≥95