High alumina bricks

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Refractory material

Clay bricks

High alumina bricks for blast furnaces

Items	GL-65	GL-55	GL-48
AL₂O₃,% ≥	65	55	48
Fe₂O₃,% ≤	2.0
refractoriness ℃ ≥	1790	1770	1750
refractoriness under load(0.2MPa) ℃ ≥	1500	1480	1450
apparent porosity % ≤	19		18
cold crushing strength Mpa ≥	58.8	49.0

High alumina bricks for hot blast stoves

Items
Items	RL-65	RL-55	RL-48	RN-42	RN-40	RN-36
AL₂O₃,% ≥	65	55	48	42	40	36
refractoriness ℃ ≥	1790	1770	1750	1750	1730	1690
refractoriness under load(0.2MPa) ℃ ≥	1500	1470	1420	1400	1350	1300
apparent porosity % ≤	24			24	24	26
cold crushing strength Mpa ≥	49	44.1	39.2	29.4	24.5	19.6

High alumina bricks for electric furnace roofs

Items		DL-80	DL-75	DL-65
AL₂O₃,% ≥		80	75	65
refractoriness ℃ ≥		1790
refractoriness under load(0.2MPa) ℃ ≥		1550	1530	1520
apparent porosity % ≤	I	19		22
	II	21		23
cold crushing strength Mpa ≥		78.5	68.6	58.8

High alumina bricks for steel ladle linings

Items	CL-48	CL-65	CL-75
AL₂O₃,% ≥	48	65	75
refractoriness ℃ ≥	1750	1790	1790
refractoriness under load(0.2MPa) ℃ ≥	1450	1490	1510
apparent porosity % ≤	21	28	28
cold crushing strength Mpa ≥	34.2	34.2	39.2

High alumina refractory bricks

Items	LZ-75	LZ-65	LZ-55	LZ-48
AL₂O₃,% ≥	75	65	55	48
refractoriness ℃ ≥	1790		1770	1750
refractoriness under load(0.2MPa) ℃ ≥	1520	1500	1470	1420
apparent porosity % ≤	23		22
cold crushing strength Mpa ≥	53.9	49.0	44.1	39.2

Unburned high alumina bricks

Items	I	II	III
AL₂O₃,% ≥	75	80	85
refractoriness under load(0.2MPa) ℃ ≥	1350	1400	1450
refractoriness ℃ ≥	1770	1800	1850
cold crushing strength Mpa ≥	58.8	65	75

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