Refers to the phosphate rock phosphate mineral apatite, phosphorite a class, it is a polar mineral salts in floatability classification. It is the main raw material for chemical fertilizers.
Floatability of phosphorus minerals
Apatite [Ca 3 (PO 4 ) 3 (F, Cl, OH)] contains 42.06% of P 2 O 3 and is an easy-float mineral. The collector is made of oleic acid and water glass for the inhibitor. Can get better indicators.
Phosphorus salt [Ca 19 F 2 (PO 4 ) 6 ], also easy to float minerals, collectors in addition to oleic acid, commonly used crude sulfate soap, inhibitor water glass, sodium carbonate as a regulator, flotation is most suitable The pulp pH is 9-10.
Flotation method
The main problem of phosphate ore flotation is the separation of phosphorus-containing minerals from calcium-containing carbonates such as calcite , dolomite, and the like. Because of the similar flotation of commonly used collectors, their floatability is similar, and there are three ways to separate carbonate-like gangue minerals:
(1) The use of water glass and starch to inhibit gangue minerals such as carbonates, and the use of fatty acids as collectors to float phosphorus minerals.
(2) Sodium hexametaphosphate is used to inhibit phosphorus minerals, and carbonate gangue minerals are first floated with fatty acids, and then phosphorus minerals are floated.
(3) Using a selective hydrocarbyl sulfate as a collector, first float out the carbonate mineral, and then use oleic acid to float the phosphorus mineral.
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