HMA plant operation Power Point

HMA PLANT OPERATION

Types Of Plants

BATCH DRUM MIXER

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Basic Purpose Of HMA Plants

To produce a quality hot asphalt mixture that contains the desired proportions of asphalt and aggregate and meets all specifications.

Batch planttypical layout

Storage Silo

Batch TowerDryer

Conveyor BeltAggregate Bins

Burner

Asphalt Storage

Hot elevator

Drum Mixer Planttypical layout

Storage Silo

Dryer

Conveyor BeltsAggregate Bins

Burner

Asphalt Storage

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Common Plant Operations

• Cold aggregate storage and feeding

• Dust control and collection• Mix storage• Weighing and handling

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Common Plant Operations

• Cold aggregate storage and feeding

• Dust control and collection• Mix storage• Weighing and handling

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Aggregate Stockpile

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Stockpiling Operations

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Cold Feed BINS

Conveyor Belts

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Common Plant Operations

• Cold aggregate storage and feeding

• Dust control and collection• Mix storage• Weighing and handling

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Hma Mixing Plants Create Dust

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Centrifugal Dust Collector

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Baghouse Dust Collector

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Collector Efficiency

74 micron

30 micron

10 micron

5 micron

1 micron

Cylone (80-90%)

Multicone (80-90%)

Wet collector (90-96%)

Baghouse

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Common Plant Operations

• Cold aggregate storage and feeding

• Dust control and collection• Mix storage• Weighing and handling

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Storage Stucture Typical Layout

HOT MIX

PLANTSurge

Bin

Conveyor

SURGE SILO

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Common Plant Operations

• Cold aggregate storage and feeding

• Dust control and collection• Mix storage• Weighing and handling

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Plants are computer controlled

TRUCK BEING LOADED FROM

A DIRECTLY FROM A BATCH

PLANT

Truck Being Loaded From A Surge Silo

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Truck Loading from a Surge Bin

BATCH PLANTtypical layout

Storage Silo

Batch TowerDryer

Conveyor BeltAggregate Bins

Burner

Asphalt Storage

Hot elevator

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Batch PlantBatch Tower

Pug Mill

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Burner - Batch Plant

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Schematic of a batch plant

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Screen Deck

HOT BINS

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Pug Mill

Drum Mixer Planttypical layout

Storage Silo

Dryer

Conveyor BeltsAggregate Bins

Burner

Asphalt Storage

Drum Dryer Mixer

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Temperature Profile in Drum Mixer

Dryer For Drum Dryer Mix Plant

Dryer For A Drum Mixer Plant

Aggregate Entry Point

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Controls

Small Drum Mixer Plant

Sometimes Things Go Wrong

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Questions - ?