Question

Froth floatation method for concentrating a sulphide ores is based on the difference in the ________ of the ore and gangue.​

Answer 1

The process of froth floatation depends on the wettability of both ore particles and gangue. It is used for the concentration of sulphide ores.

$\bullet$ Crushed ore along with gangue is poured into a mixture of oil and water.

$\bullet$ Pressurised air is the passed into the mixture causing agitation and formation of froth which wets the ore.

$\bullet$ The ore floats with the froth whereas the gangue particles are wetted by water and settle down.