17-19% inert ceramic balls 3-50mm as support media

Inert alumina ball-17 is called ceramic ball 17%~19% Al2O3. It is equal to Denstone® 57 Support Media.They are the most widely used support media in the world. It is made of high quality chemical-porcelain clay materials, which has quite excellent stability, high mechanical strength and resistance to thermal shock, This makes them all ideal choice for support of all types of catalyst.

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Description

Type Inert Alumina Ball-17
Color Light gray
Shape Ball
Chemical composition Min. % Max. % Usual %
Al2O3 17 19 18
SiO2 70 77 74.9
Al2O3 + SiO2 90 96 93
Fe2O3 / 1.0 0.9
TiO2 / 0.5 0.46
CaO / 0.65 0.42
MgO / 0.5 0.38
Na2O / 2 1.12
K2O / 3.5 3.28
Physical properties Leachable Iron (%) ≤0.1
Apparent Porosity by Weight (%) D≥10mm ≤0.4
D=6mm ≤1.0
D=3mm ≤3.0
Water absorption (wt.%) ＜1.0
Acid resistance (%) ＞99.8
E-modulus(Gpa) 60
Alkaline resistance (%) ＞85
Bulk Density(Packing density) (g/cm3) 1.35
(lb/ft3) 84
Specific density (kg/m3) 2300
(lb/ft3) 144
Moh’s hardness (scale) 7
Thermal conductivity (w/m2.k) 0.9-1.0
Specific heat (30 degC to 100 degC, Kcal/Kg dec) 0.2
Max. Operating Temperature (℃) 1050
(℉） 1922
Thermal conductivity, 30 degC to 100 degC, W/mK 1.0
Thermal Shock Stability (times)
(500 ℃ then water cooling)		 10
Co-efficient of thermal expansion 30 degC to 600 deg C, 10^-6K^-1 4.7
Geometric properties Nominal Size (mm) 3 6 10 13 16 19 25 38 50
(inch) 1/8 1/4 3/8 1/2 5/8 3/4 1 1.5 2
Crush Strength Min. (lbs) 77 176 234 572 726 1672 1870 2090 3476
(kg) 35 80 106 260 330 760 850 950 1580
(N/PC) 343 784 1039 2548 3234 7448 8330 9310 15484
Surface area m2/m3 1285 520 350 280 220 170 125 105 65
Void Fraction % 44 44 44 45 45 45 45 45 45

Application:
● Mainly used in the petroleum, chemical industry, fertilizers, natural gas, environmental
protection and other industries. As a catalyst in the reactor to cover support media and tower packing.

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