Typical Technical Parameters
 
Activated Alumina (Fluoride Removal)
 
PROPERTIES
SHAPE GRANULES
Grain Size, mm 0.40 - 1.0
Bulk Density, gm/cc 0.83 - 0.87
Absorption Capacity Wt% (at 60% RH and 30C) 17 - 21
Surface Area, m/gm 250 - 310
Bed Crushing Strength, % 96 - 99 (using 60 mesh test sieve)
Loss on Attrition, % 0.1 - 0.5
Moisture, Wt% 0.1 - 2
Al2O3 (by difference) Wt% 91 - 93
Na2O3, Wt% (max) 0.6
Fe2O3, Wt% (max) 0.1
SiO2, Wt% (max) 0.09
Loss on Ignition (250C -100C) 6.5 - 7.5
The yield of treated water (Fluoride < 1.5 mg/lit) will be > 170 lit/kg of Activated Alumina per cycle when raw water having Alkalinity 420 mg/lit, pH 7.3 and Fluoride 10.8 mg/lit is passed through a bed with flow rate 9 - 12 lit/hr. Under this standard condition Fluoride uptake capacity should not be less than 1800 mg/kg of Activated Alumina.
 
Activated Alumina
 
PHYSICAL PROPERTIES
GRADE OA-37 OAE-37 OA-25 OA-200
Form Sphere Extruded Rods Spherical Spherical
Size (mm) 3 - 5 Dia 3.5 - 4.0 Length 8 - 12 3 - 5 3/16"
Bulk Density (kg/ltr) 0.75 0.05
05
0.50 0.05
-
0.86
-
0.75 0.05
-
Surface Area, m/gm (min) - - - 300
Crushing Strength, kg (Av. Point Load of 20 (samples)) 10.0 7.0 10.2 22.0
Water Absorption (At Equilibrium)(min) (at 60% RH and 30C) 10.0      
Loss on Attrition, by wt 20.0 20.0 16 -
Total Pore Volume, cc/gm (min) - - - 0.5
CHEMICAL ANALYSIS ON DRY BASIS BY WT
Al2O3 (min) 92.00 92.00 93.90 94.00
SiO2 (max) 0.05 0.05 0.15 0.02
Fe2O3 (max) 0.20 0.20 0.05 0.02
Na2O (max) 0.30 0.30 0.30 0.30
L.O.I.: (max at 1000C) 7.00 7.00 4.62 -
Ignition Loss, Wt% (max) - - - 5.00
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