#agglomeration

• Agglomeration — The act of gathering or accumulating and its result; a large crowding, accumulation, or concentration of people, vehicles, buildings, or objects within a limited or specified space. In metallurgy and geology, it represents a technological or natural process of consolidating fine particles into larger lumps through heat treatment or structural pressing.
• Self-agglomeration — A spontaneous phenomenon or process whereby fine particles of a material, metallic powders, or mineral grains gather and compact on their own under the action of intermolecular forces, humidity, self-pressure, or electrostatics, forming aggregates or compact blocks without the addition of an external artificial binder.