The particle size is determined by the shear in the mill and the residence time (1,5) This can be expressed by : Shear Rate = (2 R V / 60 E) ...(1) where R = Colloid Mill Radius V = Rotation speed (rpm) E = gap dimension (microns) That is, the particle size is a function of mill diameter, gap and peripheral speed(1).
Sieve analysis presents particle size information in the form of an S – curve of cumulative mass retained on each sieve versus the sieve mesh size. The most commonly used metrics when describing particle size distributions are DValues (D10, D50 D90) which are the intercepts for 10%, 50% and 90% of the cumulative mass.
Physics of Particle Size Spectrophotometry Technical Note Authors Danielle Chamberlin and Rick Trutna Abstract Particle size is often determined by measuring light that is scattered by the particles. Laser diffraction instruments measure light scattering as a function of the angle of detection. In contrast, the Agilent 7010 Particle Size .
Key words:Particle size, Vibration, Sieve, Energy, magnetic flux I. INTRODUCTION The particlesize distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size.