The specification of Iron Ore  we want to buy as follows,

Chemical Composition:

Fe    64.5% (Basis) / 64% (Min)
SiO2    3.50% Max.
Al2O3   3.50% Max.
S    0.030% Max.
P    0.060% Max.
Moisture  8% Max.
PHYSICAL  :    ( Natural basis)  
0-10mm

Above 10mm 5% Max

If the size below 200mesh (equal to below 0.074mm) can be 65%min., it will be preferable.