ABSTRACT
In a beaker of water, if air is introduced from the bottom, air bubbles are produced and rise to the surface of the water as the density of an air bubble is much less than that of water. The chemicals used for treating the mineral particles to make them to adhere to the air bubbles are called collectors and the chemicals used to increase the life of the air bubbles are called frothers. A Frother is a chemical reagent and is heteropolar in nature; the polar part of it has an affinity for water and the non-polar part has an affinity for gas or repulsion for water. Eucalyptus oil, camphor oil and sagebrush oil are used when they are more cheaply available than the common frothing agents. Gangue mineral particles that are loosely attached to the bubbles are washed down by water sprays and only clean froth rises and discharged through annular trough.
