Item	Fireclay brick XW-N3	Low-porosity fireclay brick XW-N53	Grade I mullite brick	Grade II mullite brick	Grade I mullite-SiC brick	Grade II mullite-SiC brick
Al2O3 ≥%	40	45	55	55	40	35
SiC ≥%					35	45
Fe2O3 ≤%	1.8	1.3	0.9	0.8	0.8	1.0
Bulk density ≥g/cm3	2.23	2.35	2.45	2.48	2.52	2.55
Apparent porosity≤%	22	15	16	15	20	20
Cold crushing strength ≥MPa	45	80	80	90	90	90
Cold modulus of rupture ≥MPa					20
0.2MPa refractoriness under load≥℃	1450	1500	1500	1500	1600	1600
Liner change after heating(1350℃*2h)	+0.1~-0.5	+0.1~-0.5	+0.1~-0.5	+0.1~-0.5	+0.1~-0.5	+0.1~-0.5
Refractoriness	1690	1770	1790	1790	1790	1790
Thermal shock-resistance ≤次1100℃ water		15	35	25	45	60
Application section	Body inner	Body inner	Flue and cooling room		One-times syclone scrubber,chute

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