Abstract: A dust collection system includes a frame defining an opening through which a particulate material is inserted; a plurality of hollow supports extending across the opening; at least one plate extending along a length of each of the plurality of hollow supports, each of said plates extending from its respective one of the plurality of hollow supports in a downward direction; a plurality of openings extending along a lower side of each of the plurality of hollow supports; and a device for drawing dust in through the plurality of openings.

Abstract: A feeding apparatus for feeding whole tires into a cement kiln comprising a feed opening in the shell of the kiln, a passageway including a sleeve extending within and outside the kiln, an arcuate sector valve device for closing the passageway and timed to open so as to allow the tires to fall into the kiln through the passageway. The sector valve having an outer perforated wall and an inner wall, the perforated wall allowing ambient air to circulate between the outer and inner wall to keep the outer wall cool for contact with the tires. A transfer device is provided for transferring the tires onto the feeding apparatus wherein the transfer device includes fingers while the feeding apparatus includes a fork receiving tray interdigitated with the fingers to pick up the tires as the kiln rotates.