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Heating of aggregate material for asphalt mixing

  • US 3,942,944 A
  • Filed: 03/13/1974
  • Issued: 03/09/1976
  • Est. Priority Date: 03/16/1973
  • Status: Expired due to Term
First Claim
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1. In an asphalt mixing apparatus, a means for heating granular aggregate material comprising,a chamber,conveyor means in the chamber for supporting granular aggregate material and moving it intermittently through the chamber, said conveyor means including a plurality of serially arranged conveyor sections,each of said conveyor sections having temperature sensing means for sensing the temperature of aggregate material therein,means for producing flue gases and directing them through the chamber for heating the granular aggregate material in the chamber, said flue gases being chemically inert to the aggregate, and control means connected to and responsive to the temperature sensing means for controlling the temperature of the aggregate by changing the duration of stationary periods between the periods of conveyor movement.

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