High Aluminia brick for HOT BLAST FURNACE

HIGH ALUMINIA BRICKS FOR HOT BLAST FURNACE

Item		RL-65	RL-55	RL-48
Al2O3  %		≥65	≥55	≥48
Refractoriness,℃		≥1780	≥1760	≥1740
显气孔率  %		≤22（24）
常温耐压强度CCS,MPa		≥50	≥45	≥40
RUL,0.2MPa，℃		≥1500	≥1470	≥1420
Linear changes on reheating（%）	1500℃×2h	+0.1～-0.4	+0.1～-0.4	/
	1450℃×2h	/		+0.1～-0.4
Thermal shock resistance (1100℃,water cooling）,Cycle		（roof、wall）≥6
Note：the value in brackets is for checker of regenerator.