Question

Froth floatation process is used for the :

• A. Oxide ores
• B. Sulphide ores
• C. Chloride ores
• D. All of these

Answer 1

The correct option is B Sulphide ores

Froth floatation process is used for the sulphide ores. In this method, wetting of the ore by an oil takes place. A strong current of air is blown through the suspension, producing a heavy froth or foam on the surface. The metal sulphide is wetted by the oil but the gangues is not and the sulphide-oil mixture is carried to the surface by films of oil The froth is skimmed off, the gangue settles down on the bottom or remains underneath the froth.