High alumina bricks with strong corrosion resistance, good thermal shock stability,are suitable for the parts below the blast furnace bosh.

Item 项目		High Alumina Brick 高铝砖
		GL-65	GL-55	GL-48
Al2O3(%)	≥	65	55	48
Fe2O3(%)	≤	2.0	2.0	2.0
Apparent Porosity 显气孔率(%)	≤	19	19	18
Refractoriness 耐火度(℃)	≥	1790	1770	1750
Cold Crushing Strength 常温耐压强度(Mpa)	≥	60	55	50.0
Refractoriness under Load 荷重软化开始温度(℃) (0.2Mpa)	≥	1500	1480	1450
Linear Change on Reheating 重烧线变化率（%） 1500℃×2h		0~-0.2	0~-0.2	0~-0.2