KELEI MATERIAL Co.,Ltd.

Iron&Steel Industries
Aluminum Industries
Cement Industries
Garbage Disposal Industries
Power Generation Industries

High Alumina Bricks

Product Features:

Alumina-silicate products containing more than 48% of Al₂O₃ and in a certain shape, is called high alumina brick, widely used in blast furnace, thermal storage comber, soaking pit, annealing furnace, ladle, etc. High alumina brick containing more than or ever more 80% of Al₂O₃ is used in electric arc furnace roof and the special zone of other high temperature furnaces.

Technical Properties Data:

Item	L-48	L-55	L-65	L-75	L-80
Al₂O₃ %	48min.	55min.	65min.	75min.	80min
Apparent Porosity %	22max.	22max.	23min.	23min	21min.
Bulk Density g/cm³
Cold Crushing Strength MPa	39.2max.	39.4max.	49.0min.	53.9min.	78.5min.
Refractoriness Under Load T_0.6 ℃ at 0.196 MPa	1420max	1470max.	1500max.	1520max.	1550min.
*Permanent Linear Change % at 1500 ℃ 2 hr**	+0.1~-0.4 (1450 ℃)	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	0~-0.3 (1550℃)
Refractoriness, SK ℃	34min. 1750	35min. 1790	36min. 1790	36min. 1790	36min. 1790

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