Mineral processing involves reducing the particle size of an ore, separating particle sizes by screening or classification, and concentrating the separated particles by using a range of physical and surface chemistry properties.
Particle size reduction may be carried out on either dry materials or slurries. Crushing and grinding are the two primary processes. An important factor is the determination of the particle size distribution of the materials being processed. Particle sizing includes both laboratory analyses and on-line techniques that provide continuous analysis as the mineral flows through the process. Laser diffraction is a widely used technique for rapid laboratory particle size analysis.
Click here to contact usClassification exploits the differences in settling velocities by particles of different size and different densities. When the feed material contains particles of different densities as well as different size a degree of concentration takes place during classification.
Concentration by froth flotation relies on the differing surface potentials of the particles. Hydrophobic particles are recovered by the froth, whereas hydrophilic particles are discharged with the tailings. Some mineral particles are naturally hydrophobic, whereas others require specific reagent additions to change their surface potentials. Other concentration processes make use of the minerals electrostatic or magnetic properties.
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