Since wet grinding is the most
widespread process for treating raw materials, very
plastic clays are also generally hard to deflocculate.
Generally speaking, problems of deflocculation can be
ascribed to the presence of clayey minerals in which the
layers are weakly bound (minerals of montmorillonite
and/or interlaminated illite/montmorillonite nature), to
the reduced particle size, to low-order crystal structures
and to the presence of ions with high charge density such
as contraions of the negative charge of the layer