The froth flotation method is mainly used to remove gangue from which type of ores?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Sulphide ores
In froth flotation, the powdered ore is mixed with water, a little oil (such as pine oil) is added and air is blown in. The sulphide ore particles are wetted by the oil and rise with the froth, while the gangue is wetted by water and sinks.