Which of the following methods is mainly used for the concentration of sulphide ores?

Washing

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Froth floatation

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Handpicking

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Magnetic separation

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Solution

The correct option is B Froth floatation
Froth floatation method is mainly useful for sulphide ores which have no wetting property whereas the impurities get wetted. The ore with impurities is finely powdered and kept in water taken in a flotation cell. Air under pressure is blown to produce froth in water. Froth so produced, takes the ore particles to the surface whereas impurities settle at the bottom. Froth is separated and washed to get ore particles.

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___ method is generally used for the concentration of sulphide ores?

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