Introduction, the reasons for particle characterization

Particle characterization, i.e. the description of the primary properties of particles in a particulate system, underlies all work in particle technology. Primary particle properties such as the particle size distribution, particle shape, density, surface properties and others, together with the primary properties of the liquid (viscosity and density) and also with the concentration and the state of dispersion, govern the other, secondary properties such as the settling velocities of the particles, the permeability of a bed or the specific resistance of a filter cake. Knowledge of these properties is vital in the design and operation of equipment for solid-liquid separation. 

Deep bed fiiter Cartridge fiiters Precoat fiitration Sedimenting centrifuges 

Cake fiitration RV fiiters Pressure fiiters Piate and frame fiiters 

The particle size greatly affects the permeability, or specific resistance, of packed beds (as can be clearly seen from equation 9.36, the specific cake 

There are many properties of particulate systems other than those relevant to solid-liquid separation, which depend strongly on particle size the activity of dmgs, the setting time of cement, and the hiding power of pigments, to name just a few. 

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