One of the effective methods to control granular segregation is to make mixture's constituents sticky using a coating agent.
[2] Powders that are inherently not free flowing and exhibit high levels of cohesion/adhesion between the compositions are sometimes difficult to mix as they tend to form agglomerates.
The clumps of particles can be broken down in such cases by the use of mixtures that generate high shear forces or that subject the powder to impact.
The five major segregation mechanisms [3] are Sifting occurs when there is a significant variation of particle diameter in a mixture.
Those lumps will create non homogeneity in the mix since locally they will concentrate a lot of material of one case.