The delivered feed stock materials are deposited inside the building and fed into the primary shredder. The shredded materials are then transported by belt conveyor to the second stage for further treatment. Separation of the useful light fraction from inert materials (small rocks, glass, metals, dirt, and sand) is achieved though the vibrating screen. After the vibrating screen a wind sifter is used to further separate the light fraction (drier and two dimensional particles) from the heavy fraction (wet, heavier and three dimensional particles). The light fraction is then transported into the secondary shredder. The shredded materials are either stored in piles on the storage floor or sent to the storage silo for feeding to the kiln.