Sizing Mineral processing

screening ore through sieve, fixed nitrogen research laboratory, 1930



sizer 2000 screening coarse small particles

sizing general term separation of particles according size.

the simplest sizing process screening, or passing particles sized through screen or number of screens. screening equipment can include grizzlies, bar screens, wedge wire screens, radial sieves, banana screens, multi-deck screens, vibratory screen, fine screens, flip flop screens , wire mesh screens. screens can static (typically case coarse material), or can incorporate mechanisms shake or vibrate screen. considerations in process include screen material, aperture size, shape , orientation, amount of near sized particles, addition of water, amplitude , frequency of vibrations, angle of inclination, presence of harmful materials, steel , wood, , size distribution of particles.

classification refers sizing operations exploit differences in settling velocities exhibited particles of different size. classification equipment may include ore sorters, gas cyclones, hydrocyclones, rotating trommels, rake classifiers or fluidized classifiers.

an important factor in both comminution , sizing operations determination of particle size distribution of materials being processed, commonly referred particle size analysis. many techniques analyzing particle size used, , techniques include both off-line analyses require sample of material taken analysis , on-line techniques allow analysis of material flows through process.