Agitating – Mortar mixer type – With ingredient proportioning
Patent
1992-04-06
1993-10-12
Hornsby, Harvey C.
Agitating
Mortar mixer type
With ingredient proportioning
366 22, 366 33, 414 21, 414299, 414328, B28C 704
Patent
active
052519767
ABSTRACT:
An asphalt production plant which is adapted to process mixtures of recycled paving and aggregate, and which comprises a rotary drum dryer for heating and drying stone aggregate, and an elevator for conveying the heated and dried aggregate to an elevated discharge location. A batch tower is positioned adjacent the elevator, and the batch tower comprises an aggregate sizing screen which receives and segregates the aggregate by size, and several underlying aggregate storage bins, with each aggregate bin receiving aggregate of predetermined average size from the sizing screen. Also, a recycle bin is positioned between and in alignment with the aggregate bins. A weigh hopper is provided for receiving the aggregate and/or recycle material from the bins, and a pugmill is positioned below the weigh hopper for mixing the material with hot liquid asphalt and then delivering the resulting mix into an underlying truck. A gate is provided for delivering the material from the elevator into either the sizing screen or the recycle bin. In addition, a weigh belt conveyor is provided for delivering the aggregate to the drum dryer at a predetermined feed rate by weight, and a weigh belt conveyor is provided for delivering the recycle material into the elevator at a predetermined feed rate by weight.
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Astec Industries Inc.
Cooley Charles
Hornsby Harvey C.
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