Basically, the flotation process itself takes place when mineral particles attach to air bubbles and rise up. Since the beginning of the 20th century froth flotation has become a widely used beneficiation method for mineral processing and the most important separation process for the majority of nonferrous metal ores and many industrial minerals. Flotation is carried out in flotation machines. In these flotation cells the mixture of fine milled ore and water, called flotation pulp, is agitated and air is drawn into the pulp in the form of fine bubbles.