Which type of ore can be concentrated by froth flotation method ? Give two example for such ore
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Froth Floatation
principle:
This process depends on the preferential wettability of the ore with oils and gangue particles of water.
types of ores concentrated:
The Sulphide ores like Zinc blende (ZnS) and Galena (PbS) are concentrated by this method.
method:
The crushed Ore is taken in a large tank containing Pine oil and water. Potassium ethyxanthate is added to it, a current of compressed air is passed in the tank. The whole mass is agitated. The ore is wetted by the oil and gets separated from the gangue in the form of froth.
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