No

Phosphate ore Type

Number of Samples

Comments

Type one

Phosphate rock including Lucinite or aluminophosphate ore

CaO% ≤ 12%, Al2O3% ≥ 20%, P2O5% ≥ 18%

31

Should be beneficiated before producing phosphoric acid.

Can be used to produce phosphoric acid by chemical method when the content of P2O5 is more than 30%.

Two samples have a P2O5 content higher than 30%

The technical processes are complicated and the costs of production are high.

Type two

Apatite rock including aluminophosphate

CaO% ≥ 25%, Al2O3% ≤ 10%, P2O5% ≥ 20%, 12% ≤ SiO2 ≤ 35%

1

Can be used to produce qualified concentrated phosphate rock by floatation method when it can meet the requirement (CaO% ≥ 30%, Al2O3% ≤ 7%, P2O5% ≥ 25%, SiO2% ≤ 30%).

The technical processes are simple and the costs of production are reasonable.

Type three

Silica ore including phosphorus

SiO2% ≥ 40%, P2O5% ≤ 10%

9

Cannot be used to produce phosphoric acid

Iron ore including phosphorus

Fe2O3% ≥ 20%, P2O5% ≤ 10%

3

Cannot be used to produce phosphoric acid

Other

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12

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Total Number of Samples

56