Dry milling and classification for plastics and polymers.

The ATTRIMILL attrition mill is very useful for reducing the particle size of fibrous materials, plastics or other materials that are not easily shredded by conventional grinding technologies. This equipment accepts heat sensitive and soft materials more easily without cooling gas injection. This is achieved through a combination of three physical principles that generate highly efficient ultra-fine grinding: self-shredding of particles in the upward vortices generated by a strong air stream, impact against the blades and stator, and shearing of particles between the blade tips and stator flutes. With specific settings for each product, and if necessary with the addition of a separator, the fineness of the ground product can reach a few tens of microns, and the grinding rate can reach up to 25 tons per hour with a single piece of equipment.

POITTEMILL has also developed other processes with its attrition mill, notably in the sorting and recovery and revalorisation of precious materials in electronic waste, motherboards and graphic cards of obsolete computers. This unique and patented process consists of simultaneously crushing and separating metals from polymers. This innovative solution, which is in line with the current trend to recycle all materials, makes it possible to treat a large part of the urban mines of electrical and electronic waste.