High alumina firebricks are classified according to the alumina content which is from lowest  48% to highest95%, manufactured from mineral of bauxite, corundum, etc. by mixing, press-forming, drying, sintering and machining. High alumina bricks have features of  stable mechanical strength and thermal shock resistance, with high refractoriness of no lower than 1880  C, High alumina bricks are commonly used as refractory lining exposed to heat directly or backup insulation linings in various types of industrial kiln or laboratory furnace.

Description:
High alumina refractory brick

Feature:
1. Bricks are made from high quality bauxite
2. Dry pressed
3. Burned under tunnel kiln
4. Accurate dimension
5. High strength

Applications:
1. Steel furnaces
2. Iron making furnaces
3. Glass kiln
4. Ceramic tunnel kiln
5. Cement kiln

Item		Properties
		SK40	SK38	SK37	SK36	SK34
Al2O3 ,%		≥80	≥75	≥65	≥55	≥48
Refractoriness °C		≥1790	≥1790	≥1790	≥1770	≥1750
Bulk density,g/cm3		2.65	2.5	2.45	2.4	2.3
Softening temperature under load		1530	≥1520	≥1500	≥1470	≥1420
Permanent linear change,%	1500°CX2H	+0.1 -0.4	+0.1 -0.4	+0.1 -0.4	+0.1 -0.4
	1450°CX2H					+0.1 -0.4
Apparent porosity,%		22	≤23	≤23	≤22	≤22
Cold Crushing strength Mpa		55	≥50	≥45	≥40	≥35
Application		All industrial furnace

Our company produces different types of high-alumina bricks available for different Applicaitons.