Agitating – Mortar mixer type – With heating or drying
Patent
1992-02-03
1995-03-14
Scherbel, David A.
Agitating
Mortar mixer type
With heating or drying
366 15, 366 40, B28C 546
Patent
active
053971779
ABSTRACT:
An asphalt production plant with a drum dryer having two burners and expanded exhaust gas exit area. The dryer has a rotatable dryer drum with an inlet end and a discharge end. A burner is positioned at each end of the dryer drum to produce a stream of hot gases both parallel with and counter to the movement of aggregate through the dryer drum. A dust chamber surrounds a medial dust section of the dryer drum. The dust section of the dryer drum communicates with the dust chamber through slots and perforated angle plates to produce an increased area for the exit of exhaust gases. In addition to the drum dryer, the plant comprises an aggregate feed system for delivering aggregate into the dryer, an exhaust system, a drum mixer, a recycle feed system, a reservoir of bituminous fluid and an asphalt bin. A drag conveyor is provided to transfer aggregate from the dryer into the drum mixer. Recycle material and dust from the exhaust system may be introduced into the drag conveyor as well. Bituminous liquid is piped into the mixer drum from the reservoir. The drum mixer combines the aggregate, bituminous liquid and optional recycle material and dust to produce asphalt. An output conveyor moves the asphalt tom the mixer to an asphalt bin for distribution to transport trucks. Another preferred embodiment of the asphalt plant utilizes a mixing auger in place of the drum mixer.
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Brock, J. Don, "Energy Conservation on Asphalt Plants", Copyright 1980.
Scherbel David A.
Till Terrence R.
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