Abstract
Wet classification has been challenged by the needs of the industry to produce finer and finer powders in slurry form. Hydrocyclones have maintained their position as the most important classifiers in wet mineral processing. Due to the recent developments in hydrodynamic modelling, the understanding of the flow phenomena has become rather clear and has allowed the design of hydrocyclones suitable for special purposes. New cyclones have good separation efficiencies and low imperfection values.
