Patent ID: 7121487
Filing Date: 2006-10-17
Classification: B02C,B07B

Abstract:
1. A barrel screening apparatus comprising: (a) a frame; (b) a hopper for receiving particulate material to be screened, the hopper being mounted to the frame and having a hopper discharge end from which particulate material received by the hopper and conveyed in a particulate stream is discharged; (c) a barrel screen rotatably mounted to the frame inclined relative to horizontal with an output end and an opposite input end having an opening that is substantially horizontally facing and positioned adjacent the hopper discharge end for receiving particulate material discharged from the hopper; and (d) a hammermill mounted near the hopper discharge end and at least partially in the particulate stream for reducing the size of the particulate material prior to discharge of the particulate material to the input end of the barrel screen, wherein hammers of the hammermill are mounted at least partially within the substantially horizontally facing opening of the input end of the barrel screen with a portion of the barrel screen that forms the opening of the input end rotatably mounted over the hammers, and a portion of the barrel screen that forms the opening of the input end rotatably mounted below the hammers.