Which one of the following ores is best concentrated by froth-­flotation method?

  • Option 1)

    Magnetit

  • Option 2)

    Cassiterite

  • Option 3)

    Galena

  • Option 4)

    Malachite.

 

Answers (1)

As we learnt in

Froth floatation process -

This method is mainly for the concentration of sulphide ores.The method is based on the different wetting characteristics of the gangue and the sulphide ore with water and oil  

- wherein

The gangue preferentially wetted by water and the ore by oil.

 

 Froth floatation process is mainly used for sulphide ores because gangue is preferentially wetted by water whereas the ore by oil. Among the given galena, (PbS) is the only sulphide ore.


Option 1)

Magnetit

This option is incorrect.

Option 2)

Cassiterite

This option is incorrect.

Option 3)

Galena

This option is correct.

Option 4)

Malachite.

This option is incorrect.

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