Asphalt Drum Mix Plant

settings Core Technical Specifications

flowchart Key Components & System Layout

An asphalt drum mix plant relies on an uninterrupted, synchronized flow of materials. The system consists of these primary zones:

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  Cold Aggregate Feeder Bins: Multiple bins feed different sizes of stone chips and sand onto a gathering conveyor belt. Each bin features a variable-speed drive to control the material ratio accurately.
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  Slinger Conveyor: A tilted belt conveyor that receives the blended aggregates from the feeder bins and drops them directly into the drying drum. It usually features a vibrating screen to remove oversized stones.
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  The Dryer-cum-Mixer Drum: The core of the plant. The drum is divided into two functional zones:
  — Drying Zone (Front): A high-capacity burner blasts a flame into the drum. Aggregates move through internal flights that lift and cascade the stones through the flame to remove all moisture.
  — Mixing Zone (Rear): Located behind the burner flame. Liquid bitumen and mineral filler are injected here, coating the hot, dry aggregates continuously.
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  Bitumen Storage Tanks: Heavily insulated tanks equipped with internal heating coils (powered by a Thermic Fluid Heater) that keep liquid bitumen at pumping temperatures.
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  Pollution Control System: Captures fine dust particles before the exhaust gas exits the chimney. This is either a mid‑tier Wet Dust Scrubber (cyclonic water spray) or a high‑efficiency Baghouse Filter.
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  Load‑out Conveyor & Silo: A hot elevator or gob hopper conveyor transports the finished hot‑mix asphalt from the drum into a storage silo or directly onto waiting dump trucks.