Asphalt Drum Mix Plant Process

Asphalt Drum Mix Plant process is continuous i.e. raw materials - aggregates, asphalt and filler are continuously fed into the drum mixer from where the output of hot mix asphalt is also continuous. In Asphalt Drum Mix Plant working, different size virgin aggregates are stored in multiple feeder bins. Each bin is fitted with manually operated gates and belt conveyor driven by variable speed motor to preset the proportion of the aggregates to be discharged from each bin. Aggregates from all bins are received on gathering belt which transfer them on to single deck scalping screen for oversize material removal.

The screened aggregates are then transferred to rotary drying cum mixing drum by slinger conveyor. High pressure jet oil burner fitted at infeed side of the rotary drum dries & heats the aggregate in primary zone of the drum.

The heated aggregates then travel to the secondary zone (Coating zone) where they are mixed with the pre metered binders (asphalt & additives) to produce the hot mix asphalt. The hot mix asphalt is transferred to the storage silo or directly into the tipper by load out conveyor fitted with gob hopper.