Asphalt-aggregate recycle process and apparatus
Process for recycling asphalt-aggregate compositions
Asphalt mixing apparatus
Apparatus for producing hot mix asphalt utilizing recyclable asphalt aggregate
Method and apparatus for producing hot mix asphalt utilizing recyclable asphalt aggregate
Asphalt plant with improved temperature control system
Drum mix asphalt plant with fiber filter dust collector Patent #: 4211490
ApplicationNo. 06/039383 filed on 05/16/1979
US Classes:366/4, With heating or cooling366/25, By hot gases to interior366/33Plural charge means
ExaminersPrimary: Jenkins, Robert W.
Attorney, Agent or Firm
International ClassesB09B 5/00 (20060101)
E01C 19/10 (20060101)
E01C 19/02 (20060101)
AbstractA method and apparatus are disclosed which reduce smoke emissions in an asphalt drum mixer. A drum mixer heats virgin aggregate to a relatively high temperature in a first drying zone. Virgin asphalt and, in some cases, recycled pavement material containing asphalt, are added in a second zone. Mixing and discharge of the materials occur in a third zone. The invention provides for air or water cooling of the gases in the drum mixer upstream of the point of entry of the asphalt. This cooling reduces the formation of smoke which would otherwise be generated by excessive heating of the asphalt. The apparatus, according to a preferred embodiment, employs an axially positioned air duct, the outlet end of which discharges cooling air into the drum just upstream of the area of entry of the recycled material.