fire-resistant 55 high alumina brick

Brand:aa

Product detail:

High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.

High alumina brick are used normally in industry furnaces such as blast furnace, hot-blast furnace and eaf etc.

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.

 

 Specification:

Item                             Specifications		LZ-48	LZ-55	LZ-65	LZ-75	LZ-80	LZ-85
Al2O3 %		≥48	≥55	≥65	≥75	≥80	≥85
Fe2O3 %		≤2.5	≤2.5	≤2.0	≤2.0	≤2.0	≤1.8
Refractoriness°C		1760	1760	1770	1770	1790	1790
Bulk Density≥ g/cm3		2.30	2.35	2.40	2.45	2.63	2.75
Apparent porosity %		≤23	≤23	≤23	≤23	≤22	≤22
Refractoriness under load 0.2MPa°C		1420	1470	1500	1520	1530	1550
Cold crushing strength MPa		45	45	50	60	65	70
Permanent linear chang %	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