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High Purity Alumina Bricks

High Purity Alumina Bricks – ALKO 85 C and ALKO 90 C – their typical properties include high refractoriness, density, abrasion resistance and with increased resistance to molten metals, slags, glass and other chemical impacts. They are used to steel ladle nozzles, walls, roofs and extremely stressed parts of metallurgy aggregates, shaft furnaces for firing lime and cement, burner blocks and ending of burners.

Product Line

HIGH PURITY ALUMA BRICKS

Brand Name

 

ALKO 85 C

ALKO 85 C (impregnated)

ALKO 90 C

Classification According to EN

EN ISO 10081-1

HA 85

HA 85

HA 85

Base material

Corundum

Al₂O₃ (%) Content

Min.

85

85

89

Ř

86

86

90

Fe₂O₃ (%) Content

Max.

0,8

0,8

0,4

Ř

0,6

0,6

0,3

Carbon Content (%)

Min.

-

3

-

Ř

-

5

-

Bulk Density (kg. m⁻ł)

Min.

2850

3000

3000

Ř

2950

3010

3070

PTL CCS (MPa)

Min.

60

60

60

Ř

70

70

65

Apparent porosity (%)

Max.

18

-

18

Ř

16

8

16

Refractoriness Under Load t₀ˏ₆ (°C)

Min.

1650

1650

1680

Ř

1680

1680

1700

Refractoriness PCE ISO

Ř

180

180

180

TDZ PLC (%)

T/time

1500/5

1500/5

1500/5

Ř

±0,3

±0,3

±0,2

Servis Temperature (°C)

Max.

1700

1700

1750

Thermal Conductivity (W.m⁻ą.K⁻ą)

100°C

-

-

-

250°C

-

-

-

500°C

-

-

-

750°C

-

-

-

1000°C

-

-

-

1100°C

-

-

-

1250°C

-

-

-

High Purity Alumina Bricks – ALKO 90 IT – their typical properties include high refractoriness, crushing strength, density, abrasion resistance and with increased resistance to molten metals, slags, glass and other chemical impacts. They are used to nozzles, throttling bore and ceramic plates for slide gates of steel ladles

Product Line

High Purity Alumina Bricks

Fireclay Graphite Brick

Brand Name

 

ALKO 90 IT

ALKO 90 IT / impregnated

ALKO 37 PG 15

Classification according to EN

EN ISO 10081-1

HA 85

HA 85

FC 35

Base Material

 

Corundum

Fireclay

Al₂O₃ (%) Content

Min.

90

90

37

Ř

92

92

39

Fe₂O₃ (%) Content

Max.

0,3

0,3

2,5

Ř

0,2

0,2

1,6

Carbon Content (%)

Min.

-

3

-

Ř

-

4

14

Bulk Density (kg. m⁻ł)

Min.

3020

3090

2150

Ř

3060

3150

2270

PTL CCS (MPa)

Ř

100

100

-

Apparent Porosity (%)

Max.

17,5

8

-

Ř

15

7

13

Refractoriness Under Load   t₀ˏ₆ (°C)

Ř

1700

1700

-

Ř

180

180

-

Servis Temperature (°C)

Max.

1750

1750

1600

Thermal Conductivity(W.m⁻ą.K⁻ą)

100°C

-

-

-

250°C

-

-

-

500°C

-

-

-

750°C

-

-

-

1000°C

-

-

-

1100°C

-

-

-

1250°C

-

-

-

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