Natural Indian Minerals
Rock Phosphate Minerals

Name and Composition - It is a rock containing P2O5 in the form of chlore-apatite, fluor-apatite, collophane Ca3 (F,CI) (PO4)3. Phosphrite having +30%, P2O5 is put under high grade category where as the phosphorite containing less than 30% P2O5 is put under low grade category.

Physical Properties - It occurs as granular and hard massive rock in the form of phosphatic stromatolites or nodules.

Mode of Occurrence - As phophatic stromatollites associated with dolomite/shale/quartzite/limestone and generally of sedimentary origin.

Uses - Chiefly used for manufacturing of single/triple super phosphate (phosphate fertilizers). It can also directly be used as fertilizer in acidic soils, also used in manufacture of chemicals, phosphoric acid etc.

Mineral based Industries – Fertilizer units for S.S.P and T.S.P., diammoniuam phosphate, dicalcium phosphate, phosphoric acid beneficiation plants.

Industrial Prospects – Beneficiation plant, fertilizer units (S.S.P., T.S.P.).


Physical Properties
Hardness
Sp. gr.
Density
3 to 3.5
4.8 to 4.9
1.76 g/cm3
Chemical Properties
P2O5
CaO
SiO2
CO2
MaO
Fe2O3
Na2O
K2O
R2O3
F
Cl
SO3
30%
45%
6%
5%
0.5%
1%
0.8%
0.3%
2.1%
4%
0.2%
2.1%
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