Question

The method used to separate ore from gangue by preferential wetting.

Answer 1

Method of separating gangue from ore by preferential wetting:

• The process of removal of the impurities from the ore is called concentration of ores.
• One such method of concentration is Froth Floatation process.
• It involves the preferential wetting of the ore with the help of oil and gangue by the help of water.
• In this method the ore slurry is mixed with pine oil (frothier) and ethyl xanthate (collector).
• The ore gets damped by oil and forms a froth and rises to the surface of tank, while the impurities settle down after wetting.