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Symbol for flotation
Symbol for flotation

Flotation is the separation of particles from a mixture by causing some particles to collect on the surface of bubbles. Differential wetting of the suspended particles causes separation: The particles that are to be floated are rendered hydrophobic by the addition of the appropriate chemicals, flotation reagents. Air is then bubbled through the mixture to cause agitation. The desired particles become attached to the small air bubbles and move to the surface where they accumulate as a froth and are collected, or if the non-desired particles float to the surface they are collected and discarded.


  • In mineral processing of metals on a slurry of suspended, pulverized minerals to concentrate valuable metal species and discard the gangue. Flotation in order to concentrate metals is referred to as froth flotation.
  • In wastewater-treatment

See also

External link

Flotation game - train Your skills! Examine the froth flotation in BioMinE 3D_models_of_bioleaching_plants_on_LTU_island_in_Second_Life

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