High Alumina Refractory Brick

High alumina bricks   Specifications High alumina bricks:
1. Low price
2. Pefect Performance
3. Great bulk density
4. Low iron content   1. High Alumina Brick    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.    
2. Specification for high alullina brick  

		Item
		LZ-75	LZ-65	LZ-55	LZ-48
Al2O3 ,%≥		75	65	55	48
Refractoriness, °C≤		1790		1770	1750
0.2Mpa refractoriness under load, °C≤		1520	1500	1470	1420
Reheating linear change, %	1500°C,2h	+0.1 -0.4			-
	1450°C,2h	-			+0.1 -0.4
Apparent porosity, %≤		23		22
Compress strength, MPa≥		53.9	49.0	44.1	39.2

    3. Packing of High Alumina Brick   Bricks are packed on wooden pallet and then polyethylene film is placed over it, finally the package is tied up with steel strips.