Double rotating mixing system

Details Double rotating mixing system Double rotating mixing system

B - Operations, Transporting

01

F

B01F 9/08 (2006.01) B01F 13/02 (2006.01) B28C 5/20 (2006.01) B28C 5/46 (2006.01) E01C 19/10 (2006.01)

Patent

CA 2231693

The disclosed invention provides a drying and mixing plant for mixing material with an additive comprising a tapered inner drum and an oppositely tapered outer drum attached together concentrically and rotated as a unit. A burner directs a hot air stream into the small end of the inner drum. Material is fed into the small end of the inner drum, where impellers lift it and drop it into the hot air stream and move the material through the inner drum aided by the downward taper of the inner drum. The material exits the inner drum and enters the outer drum, where an additive material is introduced and mixed with the material. The receiving end of the outer drum is enclosed in a shroud, which directs the airstream through the chamber between the drums, the chamber having an expanding cross section which slows the air down allowing fines to precipitate out. The device may include nozzles for spraying water across the path of the air stream and material flow, and further may include, for fluid additive materials, additive nozzles spraying the additive material across the path of the air and material. The device is particularly suitable for mixing asphalt paving mix.

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