Double roll extrusion granulator
Functional characteristics:
Dry materials are agglomerated into dense and hard blocks (cakes) under pressure, which is called extrusion process; the cakes are crushed and screened into granules, which is called granulation process. The role of extrusion is to expel the air between particles and to make the distance between particles close enough to generate attractive forces such as van der Waals force, adsorption force, crystal bridge and embedded connection. The strength of extruded granules is mainly formed by the interaction between molecules.