General Theory of Segregation

Mixtures of solid particles can segregate during handling and lead to inhomogeneity of the bulk material. The major properties that can lead to segregation of particles include differences in particle size, density, and shape. While each of these can contribute to overall segregation, it is widely recognized that the particle size is by far the most important [1-6]. Particle median diameter ratios as low as 

Bulk blending of granular components is a process well known in the fertilizer business where it is common to blend various proportions of straight fertilizers to yield appropriate N,P,K grades for specific applications. A standard rule of thumb for fertilizer blending is to maintain a component median diameter difference of less than 5% [11]. Consideration of the component size distribution or spread is also important to consider when comparing properties of materials intended for blending [12]. 

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