High alumina brick

Details

The high alumina bricks is divided into different kinds according to the content alumina and usage, they are widely used in glass furnace, blast furnace, hot blast stoves, electric arc furnace,cement kiln and other heat-engineering equipments.

Items/Models		Burned Bricks					Unburned Bricks
Items/Models		DL-80	DL-75	DL-65	DL80P	DL85P	BDL-80	BDL-75	BDL-65	DL80P-B
Al2O3 % min		80	75	65	75	80	80	75	65	70min
Fe2O3 % max					1.7	1.7				1.7
Refractoriness ℃ min							1780	1780	1770
Softening temperature under load KD ℃ min		1530	1520	1520			1530	1520	1470
Linear change rate after reheating %(1500℃x2h)		0.2-0.4	0.2-0.4	0.2-0.4
Apparent porosity % max	Suspended roof bricks	19	19	19	18	19	18	18	19	19
Apparent porosity % max	Skew angel bricks	21	21		18	19	20	20		19
Compressive strength Mpa min		75	65	58.8	50	80	60	55	30	50
Thermal shock stability, times(1100℃ water cooling) max							8
Application		Steel making electric furnace

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