FERTILIZER GRADE
TYPICAL CHEMICAL ANALYSIS
(On dry basis at 105
o
C)
SiO
2
:
56-60
%
MgO
:
1.5-2.5
%
Al
2
O
3
:
16-18
%
CaO
:
1.0-2.4
%
Fe
2
O
3
:
4-6
%
K
2
O
:
1.5-2.5
%
Na
2
O
:
0.4-1.0
%
TiO
2
:
0.2-0.5
%
LOI
:
8-10
%
PHYSICAL PROPERTIES
Moisture Content , %
8-12
5% Suspension , pH
8.5-10.5
Free Acid , mg KOH/g
1
max
Specific Gravity , g/cm
3
2.4-2.6
Loose Bulk Density , g/cm
3
0.75-0.9
Dry particle size
75%
pass 75 micron , min
Surface Area , m
2
/g
300-400
