Corundum brick

AluminaBrick

Corundum brick

Corundum brick is an aluminum-silicon refractory product with corundum as the main phase. Corundum bricks are divided into three types: fused cast corundum brick, fused corundum sinter brick, and sintered corundum brick. Corundum brick has a series of excellent properties, high mechanical strength and high hardness.

Model Number:AZS33,AZS36,AZS41,1532,1334,1240,1681,1685,1691,1711

Certification:ISO 9001-14001

Minimum Order Quantity:5MT

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Corundum brick description

Corundum brick is an aluminum-silicon refractory product with corundum as the main phase. Corundum bricks are divided into three types: fused cast corundum brick, fused corundum sinter brick, and sintered corundum brick. The cast-cast corundum brick is obtained by melting industrial alumina and a small amount of soda ash and quartz powder in an electric arc furnace, followed by casting, annealing and the like, and finally mechanically processing into a desired shape and size. The fused corundum re-sintered brick is made of pulverized fused corundum granules and fine powder, added with a small amount of clay and a binder, and after thorough mixing, it is formed by a brick press. The brick density is 2.75~2.85g/cm3. After the brick is dried, it is fired at 1700~1800 °C.

Corundum brick characters

Corundum brick has a series of excellent properties, high mechanical strength and high hardness. In addition, it also has good wear resistance, oxidation resistance, erosion resistance and electrical insulation properties.

Corundum brick		HCR G93	HCR G98
chemical composition	Al2O3	≥93	≥98
	SiO2	≤5.0	≤0.2
	Fe2O3	≤0.1	≤0.1
	CaO	≤1.2	≤1.2
	Na2O	-	-
	ZrO2	-	-
	Cr2O3	-	-
apparent porosity		≤17	≤17
bulk density		≥3.15	≥3.2
CCS Mpa		≥100	≥100
Thermal flexural strength1250℃ Mpa		≥9.5	≥9.5
refractoriness ℃		≥1900	≥1850
Refractoriness under load of 0.2 Mpa		≥1700	≥1680
Linear change on reburning 1500℃×2h %		≤ ± 0.2	≤ ± 0.2

Fused cast zircon corundum blocks description

Fused cast zircon corundum blocks are commonly known as white iron bricks. It is the most important refractory material to ensure the normal operation of the glass melting furnace. At present, the melting rate of the glass melting furnace at home and abroad is increased, the kiln age is extended, and the fuel consumption is reduced mainly due to the use of the refractory material. The use of fused cast zircon corundum block in the glass melting furnace is to build the upper pool wall, small furnace flat raft, small furnace raft, stone raft and chest wall.

Chemical Composition( % )		AZS #33	AZS #36	AZS #41
ZrO₂		≥ 32.5	≥ 36	≥ 40.5
SiO₂		≤ 15.5	≤ 14.0	≤ 12.5
Al₂O₃		Remains	Remains	Remains
Na₂O		≤ 1.4	≤ 1.6	≤ 1.2
Fe₂O₃+ TiO₂		≤ 0.25	≤ 0.25	≤ 0.25
Physical characters
Volume density (hardest part)		≥ 3.80	≥ 3.85	≥ 4.05
Cold crushing strength (MPa)		≥ 300	≥ 300	≥ 300
Exudation Temp. of glass phase （℃）		≥ 1400	≥ 1410	≥ 1420
Refractorinessunder load of beginning (0.2MPa)		1700	1700	1700
Corrosion Resistance to glass melt 1300℃x10h(mm/24h)		1.5	1.0	0.7
Bulk density (g/cm³)	PT	3.42		≥ 3.55
	QX	3.45		≥ 3.55
	ZWS	3.65	≥3.65	≥3.85
	WS	3.70	≥ 3.75	≥ 3.95
Crystalline phase composition ( % )
Baddeleyite monocrystal		32	35.5	40
Glass phase		20	19	17
Corundum		47	44	42
Note: Apply to the products of weight more than 50 kg

Chrome corundum brick description

The chrome corundum brick is a corundum refractory product containing Cr2O3. At high temperature, Cr2O3 forms a continuous solid solution with Al2O3, so the high temperature performance of chrome corundum brick is better than that of pure corundum brick. The chrome corundum brick is mainly used as the lining material for the lower part of the petrochemical industrial slag oil and gas furnace, and can also be used as a sliding nozzle material.The chrome corundum brick has good high temperature resistance and slag resistance, excellent resistance to molten coal slag erosion, and its slag resistance increases with the increase of Cr2O3 content.

chrome corundum brick		HCR CC15	HCR CC30	HCR CC40	HCR CC50
chemical composition	Cr2O3	≥15	≥30	≥40	≥50
	ZrO2	≤3	≤5	≤5	≤5
	Al2O3	≥75	≥60	≥48	≥39
physical characteristic	Apparent Porosity	≤17	≤18	≤18	≤18
	Bulk Density	≥3.25	≥3.3	≥3.35	≥3.45
	CCS Mpa	≥100	≥100	≥100	≥100
	Refractoriness under load of 0.2 Mpa	≥1700	≥1700	≥1700	≥1700