GRANULATION OF RAW - MATERIALS FOR FERTILISER
BLENDING
TARGETS AND TOLERANCES |
| CRITERIA |
TARGET |
TOLERANCE |
| VERBAL NOTATION |
PHYSICAL DIMENSION (1) |
| Mean particle size |
d50 (in mm) |
3,25 mm |
+/- 0,25 mm |
| Fine particles |
<1 mm |
0 % |
0,25 % |
| Coarse particles |
>5 mm |
0 % |
1,00 % |
| Main range |
2,5 - 4,00 mm |
90 % |
+ / - 5 % |
| Granulometric spread index (2) |
GSI = (d84 - d16) x 100)
/ (2 x d50) |
<18 |
|
(1) It si assumet, that the sieve analysis
occurs according to CEN, European standard EN 1235/A1
The AFCOME recommend to use these 7 sieves : (5, 4, 3.55, 3.15, 2.80,
2.50 and 1 mm)
(2) Former notation was "Average size range variation" |
|