DURANIT
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Pressure drop Physical-chemical properties Physical properties
Pressure drop (dry) for Inert-Ball beds
Druckverlust
Physical-chemical properties

Physical-chemical properties, Average ball values

Parameter

Unit

DURANIT®

DURANIT® X500

DURANIT® D92
Alumina
ca. 92% Al2 O3

DURANIT® D99
High Alumina
ca. 99% Al2 O3

SiO2

%

66 - 73

66 - 73

< 7

< 0,2

Al2O3

%

23 - 26

23 - 26

90 - 94

~ 99

K2O + Na2O

%

2,5 - 3,5

2,5 - 3,5

< 0,2

< 0,4

Fe2O3+ TiO2

%

2 - 3

2 - 3

< 1

< 0,5

CaO + MgO

%

0,4 - 0,8

0,4 - 0,8

< 0,2

< 0,2

Roundness

dmax / dmin

< 1,25

< 1,25

< 1,25

< 1,25

Volume

%

40 - 45

40 - 45

40 - 45

40 - 45

Compression strength

kg

Exceeds all internaional specifications

Density

g/cm3

2,2 - 2,4

2,2 - 2,4

3,2 - 3,4

3,4 - 3,6

Water absorption

%

< 3

< 0,25

2 - 6

2 - 6

BET-surface

m2/g

< 0,1

< 0,1

< 0,1

< 0,1

Mohs-Hardness

Mohs

~ 8

~ 8

~ 8

~ 9

Max. application temp.

°C

1000

1000

1600

1800

Expansion coefficient

1/K

4,7 x 10-6

4,7 x 10-6

5 x 10-6

6,7 x 10-6

Spec. thermal energy

kJ / (kg x K)

~ 0,84

~ 0,84

~ 1,1

~ 1,1

Thermal conductivity

kJ / (m x h x K)

~ 6,3

~ 6,3

~ 8

~ 14,6

Special ceramic upon request; Carbon (full cylinders) upon request; Other qualities upon request
Physical properties

Physical properties, Average vall values

Nominal size
[ " ]
inch

Diameter
[ mm ]

Spec. surface
[ m2 / m3 ]

DURANIT®
Bed Weight
[ kg / m3 ]

DURANIT® X500
Bed Weight
[ kg / m3 ]

DURANIT® D92
Alumina
ca. 92% Al2 O3
Bed Weight
[ kg / m3 ]

DURANIT® D99
High Alumina
ca. 99% Al2 O3
Bed Weight
[ kg / m3 ]

1/8

3 - 5

1285

1400

1400

--

2200

1/4

6 - 8

500

1400

1400

2100

2200

3/8

9 - 11

350

1400

1400

2000

2200

1/2

11 - 14

280

1400

1400

2000

2200

5/8

14 - 17

220

1400

1400

2000

2200

3/4

19 - 21

170

1400

1400

2000

2200

1

23 - 28

125

1300...1400

1300...1400

--

2000

1,25

29 - 35

105

1300...1400

1300...1400

--

2000

1,5

35 - 43

85

1300...1400

*)

--

2000

2

48 - 55

65

1300...1400

*)

--

2000

3

72 - 80

45

1300...1400

*)

--

1900

Generally accepted tolerances apply to all ceramic products. Special geometries properties (full cylinders, prisms, etc.) upon request
*) upon request
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