2022-11-29 17600

AZS series zirconia corundum refractory brick

Fused cast AZS refractory is also called fused cast brick which is abbreviated as AZS because it contains Al2O3-ZrO2-SiO2. Fused cast AZS block is made from pure alumina powder and Zircon sand (composed of 65% zirconia and 34% SiO2). After Alumina powder and zircon sand melting in electric furnace, they are cast into various molds and cool themselves down to become white solid. Because of the different content of Zirconia from 33%-41%, our fused cast AZS Bricks can be divided into three types AZS—33#,AZS—36# and AZS—41#.


Description of fused cast AZS refractory
Fused cast AZS 33# block has dense micro structure which ensures its great resistance in glass liquid, thus you don’t have to worry about the solidification and other problems. It is widely applied to glass furnace for superstructure, working pool side wall, paving blocks, feeder channels, tank bottoms, C-shaped block and doghouse crown,etc.


Advantages of fused cast AZS refractory
1. Compact microstructure
2. Good erosion resistibility to molten glass
3. Good thermal shock resistibility,high compression resistance
4. Barely rendering blister
5. A variety of formats and shapes for furnace different working areas
Different casting methods can produce various shapes and sizes AZS for different areas of glass furnaces.


Product Applications
Bricks are mainly used in the linings in decomposing furnaces for petroleum and chemical industry, as well as the chemical fertilizer industry. They are also used as high temperature kiln linings and furnitures in metallurgical industry.

Specification


chemical composition

AZS-33

AZS-36

AZS-41

ZrO2

≥33

≥35

≥40

SiO2

≤16.0

≤14

≤13.0

Al2O3

a little

a little

a little

Na2O

≤1.5

≤1.6

≤1.3

Fe2O3+TiO2

≤0.3

≤0.3

≤0.3

Physical Properties




bulk density(g/cm3)

3.5-3.6

3.75

3.9

cold crushing Mpa

350

350

350

thermal expansion coefficient (1000°C)

0.80

0.80

0.80

exudation temp. of glass phase

1400

1400

1400

corrocion resistance of glass melt(mm/24h)

1.6

1.5

1.3

Density

PT QX

3.40

3.45

3.55

WS ZWS

3.60

3.70

3.80

Phase composition(%)




baddeleyite

32

35

40

glass phase

21

18

17

α- corundum

47

47

43


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