Countercurrent drum mixer asphalt plant

Details Countercurrent drum mixer asphalt plant Countercurrent drum mixer asphalt plant

E - Fixed Constructions

01

C

259/8

E01C 19/10 (2006.01) C08L 95/00 (2006.01)

Patent

CA 1278789

Abstract A drum mixer asphalt plant is provided with a rotatable cylinder 10 in which virgin aggregate, recycle material and liquid asphalt are mixed to produce an asphaltic composition and the hot gas stream for heating and drying the materials flow in countercurrent relation. In a first zone within the cylinder 10, aggregates are heated and dried by heat radiation and a hot gas stream generated at a burner head 46 of a combustion assembly 40. In a second zone within the drum cylinder 10 isolated from the burner flame and hot gas stream by the combustion assembly 40, liquid asphalt is sprayed from an injection tube 76 to mix with aggregate materials. A recycle feed assembly 60 delivers recycle asphalt material to the second zone also for mixing with the aggregate and liquid asphalt.

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