High Alumina Bricks

HIGH ALUMINA BRICK
High alumina firebricks are classified according to alumina content ranging from 48% to 90%.

Application
High alumina bricks are commonly used in blast furnace, hot blast furnace, the roof of electric furnace, teeming ladle, rotary kiln, regenerator, etc.

Features
Low thermal conductivity Excellent acid and base slagging resistance
High refractoriness Excellent thermal shock resistance
Excellent mechanical strength

As for high alumina brick series products, we excel our other high alumina brick suppliers in many aspects, such as:
We enjoy the biggest production lines of high alumina brick and largest production capacity.
---More than 8000 mts high alumina brick can be supplied per month. We can help you save your time limit for a project. Besides, we provide a small number of high alumina brick used for kinds of furnace maintenance as well.
Advanced technology makes it possible for us to have very high qualified rate of high alumina brick.
---Our qualified rate of high alumina brick has so far reached over 98%, therefore, our high alumina brick enjoy excellent quality and reasonable price from the point of view.

1. SK standard series high alumina brick This index applies to SK series high alumina bricks. SK series high alumina bricks include SK-40 high alumina brick; SK-38 high alumina brick; SK-36 high alumina brick; SK-34 high alumina brick; SK-32 high alumina brick.

high alumina brick Item		high alumina brick Index
		SK-40	SK-38	SK-36	SK-34	SK-32
Al2O3, % ≥		80	65	48	42	36
Refractoriness oC ≥		1790	1790	1750	1730	1710
Refractoriness under load, (0.6%), oC ≥		1530	1500	1420	1350	1300
App. porosity, %		21	23	23	24	24
C. C. S, MPa ≥		75	49	39.2	25	20
Linear change on reheating, %	1400oC × 2h				+0.1-0.5	+0.2-0.5
	1450oC × 2h			+0.1 -0.4
	1500oC × 2h	+0.1 -0.4	+0.2 -0.4

2. High Alumina Brick for general uses This index applies to high alumina bricks for general uses. The high alumina bricks for general use are composed of LZ-75 high alumina brick; LZ-65 high alumina brick; LZ-55 high alumina brick; LZ-48 high alumina brick; anchor high alumina brick for reheating furnace. They include LZ-55 high alumina brick; LZ-48 high alumina brick.

high alumina brick Item	high alumina brick Index
	LZ-75	LZ-65	LZ-55	LZ-48
Al2O3, % ≥	75	65	55	48
RefractorinessoC ≥	1790	1790	1770	1750
Refractoriness under load, (0.6%), oC ≥	1520	1500	1470	1420
Linear change on reheating, (1500oC × 2h)%	+0.1-0.4	+0.1-0.4	+0.1-0.4	+0.1-0.4(1450oC )
App. porosity, %	23	23	22	22
C. C. S, Mpa ≥	54	49	44	39

3. High alumina brick for blast furnace This index applies to high alumina bricks for building the following parts of cylinder of blast furnace. They include GL-65 high alumina brick; GL-55 high alumina brick; GL-48 high alumina brick.

high alumina brick Item		high alumina brick Index
		GL-65	GL-55	GL-48
Al2O3, % ≤		65	55	48
Fe2O3, % ≤		2
Refractoriness CN		1800	1780	1760
0.2MPA refractoriness under load, oC ≥		21	23	23
Linear Exchange After reheating, %	1500oC, 2h	0-0.2		-
	1450oC, 2h	-		0-0.2
Apparent porosity, % ≤		19		18
Compressive strength, MPA ≥		58.8	49
Ventilation		High alumina brick must be tested and list the actual Measuring data in the quality certification

4. Burned micro hole carbon-high alumina brick for blast furnace Burned micro hole carbon-high alumina brick for blast furnace is divided into: WLT-1 carbon-high alumina brick; WLT-2 carbon-high alumina brick; WLT-3 carbon-high alumina brick.

high alumina brick Item		high alumina brick Index
		WLT-1	WLT-2	WLT-3
Al2O3, % ≥		65	60	55
C, % ≥		11	11	11
Fe, % ≤		1.5	1.5	1.5
Compress strength, MPa ≥		70	60	50
Bulk density, g/cm3 ≥		2.85	2.65	2.55
Apparent porosity, % ≤		16	17	18
Molten iron corrosion index, % ≤		2	3	4
Heat conductivity, w/(m. k) (0-800oC ) ≥		13	13	13
Alkali resistance, % ≤		10	10	15
Air permeability, um2(mDa) ≤		4.94× 10-4 (0.5)	1.97× 10-3 (2.0)	1.97× 10-3 (2.0)
Average aperture, um ≤		0.5	1	1
< 1um hole cubage, % ≥		16	17	18
1. high alumina-carbon brick, The scope of test for diameter of hole distribution: 0.006um-360um 2. high alumina-carbon brick, The molten iron corrosion index only is used in dry crucible and the bottom.

5. Normal high alumina brick for hot blast stove This index applies to normal high alumina brick for building hot blast stove. Normal high alumina bricks for hot blast stove include: RL-65 high alumina brick; RL-55 high alumina brick; RL-48 high alumina brick.

high alumina brick Item		high alumina brick Index
		RL-65	RL-55	RL-48
Al2O3, % ≥		65	55	48
Refractoriness oC ≥		1500	1470	1420
Linear change After reheating %	1500oC, 2h	0.1— -0.4		-
	1450oC, 2h	-		0.1— -0.4
Apparent porosity, % ≤		22(24)
Compress strength, Mpa ≥		50	45	40
Thermal shock resistance(1100oC -Cold), % ≥		(Roof, wall bricks) 6

6. Low creep high alumina brick for hot blast stove This index applies to low creep high alumina brick for building hot blast stove. They include: DRL-155 high alumina brick; DRL-150 high alumina brick; DRL-145 high alumina brick; DRL-140 high alumina brick; DRL-135 high alumina brick; DRL-130 high alumina brick; DRL-127 high alumina brick

high alumina brick Item		high alumina brick Index
		DRL-155	DRL-150	DRL-145	DRL-140	DRL-135	DRL-130	DRL-127
Al2O3, % ≥		75	75	65	65	65	60	50
Apparent porosity, % ≤		20	21	22	22	22	23
Volume, density, g/cm3		2.65-2.85	2.65-2.85	2.50-2.70	2.40-2.60	2.35-2.30	2.30-2.50	2.30-2.50
Compress strength, Mpa ≥		60	60	60	55	55	55	50
Creep rate, % (0.2Mpa, 50h) ≤		1550oC 0.8	1500oC 0.8	1450oC 0.8	1400oC 0.8	1350oC 0.8	1300oC 0.8	1270oC 0.8
Linear Change after reheating %	1550oC, 2h	0.1— -0.2	0.1— -0.2	0.1— -0.2
	1450oC, 2h				0.1— -0.2	0.1— -0.4	0.1— -0.4	0.1— -0.4
Thermal shock Resistance (1100-Cold),		(Roof, wall bricks) Offering data

7. High alumina brick for electric arc furnace roofs This index applies to burned and unburned high alumina bricks for electric arc furnace roofs. The burned and unburned high alumina bricks for electric arc furnace roofs are composed of: DL-80 high alumina brick; DL-75 high alumina brick; BDL-80 high alumina brick; BDL-75 high alumina brick.

high alumina brick Item		high alumina brick Index
		DL-80	DL-75	BDL-80	BDL-75
Al2O3, % ≥		80	75	80	75
Refractoriness oC ≥		-	-	1780	1780
0.2Mpa refractoriness under load, oC ≥		1530	1520	1530	1520
Linear change after reheating % 1500oC, 2h		0.2— -0.4		-	-
Apparent Porosity, %	Roof bricks ≤	19		18
	Corner of vault ≤	21		20
Compress strength, Mpa ≥		75	65	60	55
Thermal shock resistance(1100oC -Cold) ≥		Offering data		8

8. High alumina brick for steel ladle This index applies to high alumina bricks for steel ladle lined with working-level. They include CL-55 high alumina brick; CL-65 high alumina brick; CL-75 high alumina brick; CL-80 high alumina brick; PZCL-78 high alumina brick.

high alumina brick Item		high alumina brick Index
		CL-55	CL-65	CL-75	CL-80	PZCL-78
w(SiO2)/% ≥		55.0	65.0	75.0	80.0	78.0
w(Fe2O3)/% ≤		-	-	-	2.0	2.0
0.2Mpa refractoriness under load, oC ≥		1470	1490	1510	1530	1550
Linear change After reheating %	1450oC, 2h	0.1-0.5	-	-	-	-
	1500oC, 2h	-	-0.1-0.5	0.1-0.5	-	-
	1500oC, 2h	-	-	-	0.1— 0.5	0.4— 0.3
Apparent porosity, % ≤		22.0	28.0	28.0	24.0	21.0
Compress strength, Mpa ≥		45	35	40	50	70

High alumina brick packing high alumina brick are packed on wooden pallet and then polyethylene film is placed over the high alumina brick package, finally the package is tied up with plastic-steel strips. High alumina brick order quantity we can supply big quantity for whole blast furnace project, hot blast stove project and electric arc furnace. We can also provide a small quantity of high alumina brick used for the above furnace repair. High alumina brick delivery time More than 8000 mts high alumina brick can be supplied per month.