55% Al2O3 high alumina brick

Brand:aa

Product detail:

Specification for High Alumina Brick

Index           Product		LZ-48	LZ-55	LZ-65	LZ-70	LZ-75	LZ-80	LZ-85
Al2O3  %		≥48	≥55	≥65	≥70	≥75	≥80	≥85
Fe2O3  %		≤2.5	≤2.5	≤2.0	≤2.0	≤2.0	≤2.0	≤1.8
Refractoriness °C		1760	1760	1770	1770	1770	1790	1790
Apparent porosity  %		≤23	≤23	≤23	≤23	≤23	≤22	≤22
Bulk density g/cm3		2.30	2.35	2.40	2.40	2.45	2.68	2.75
Refractoriness under load 0.2MPa°C		1420	1470	1500	1510	1520	1530	1550
Cold crushing strength MPa		45	45	50	60	60	70	70
Permanent linear change %	1500°C×2h	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4

 

High Alumina Brick  : the temperature of refractoriness under load is normally above 1420~1550°C , which is higher than the fireclay brick and it increases along with the AL2O3 content enhances.

 

For  high alumina brick , the thermal Shock resistance is mainly decided by chemical contents and its mineral microstructure but its thermal shock resistant is worse than the fireclay brick.  High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.

 

High Alumina Brick is used normally in industry furnaces such as Blast furnace, hot-blast furnace and EAF etc