Patent ID: 7441716

Claim:
A closed circuit, dry processing system for processing aluminum containing products and producing reusable particles of aluminum, comprising: a pre-crusher unit for crushing the aluminum containing products into chips; a magnetic separator arrangement for separating the chips coming from the pre-crusher unit into iron-based chips and ironless chips; a crusher unit for crushing the ironless chips into chip fragments; a feeder unit for controlling supply of the chip fragments at a predetermined rate; a vertical granulator unit for granulating the chip fragments supplied by the feeder unit into spheroidal particles of aluminum and other particles of organic and carbonic materials, the vertical granulator unit having a lower inlet for receiving the chip fragments from the feeder unit, an upper outlet, and a granulation chamber between the inlet and the outlet; a means for producing a controlled upward airflow in the granulation chamber drawing those of the particles exceeding a predetermined granulation degree out through the outlet of the vertical granulator unit; a sifter unit for classifying the particles coming from the vertical granulator unit as a function of their sizes; and a separator arrangement for separating the particles classified by the sifter as a function of their weight, the separator arrangement having a first outlet arrangement for releasing the spheroidal particles of aluminum and a second outlet arrangement for releasing residues formed by the other particles, the spheroidal particles of aluminum forming the reusable particles of aluminum.