mineral processing technology and mineral processing equipment

For size control of particles finer than 1 mm, we are moving out of the practical range of conventional screens. Classification is the process of separating particles by size into two or more products according to their behaviour in air or water (liquids). Classification methods • Wet classification with Hydrocyclones using separation by centrifugal force covering the size range of 100 – 10 micron (typical) • Wet classification with Spiral classifiers using separation by gravity covering the size range of 100- 1000 micron (typical) • Dry classification using separation by centrifugal force covering the range of 150 – 5 micron (typical). Wet classification – fundamentals If a particle has no interference from other particles it moves faster than a particle surrounded by other particles due to increased density and viscosity of the slurry. This is called free and hindered movement and is valid both for gravity and centrifugal classification. Hydrocyclone Centrifug...