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Title:

Hot Mix Asphalt Production

Description:

Hot Storage Skip and Winch System. Plant Mixing Tower. Skip Bucket. Winch. Storage Silo: 165 t Capacity. Correct Loading Sequence. The good old days. The End ... – PowerPoint PPT presentation

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Tags: asphalt | hot | mix | production | winch

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Title: Hot Mix Asphalt Production


1
Hot Mix Asphalt Production
Road Pavement Forum 10th April 2006
  • Chris Lange PMP, Pr.Tech.(Eng)
  • Director (Technical)
  • Much Asphalt (Pty) Ltd

2
Hot Mix Asphalt Production
  • Plant types and basic components
  • Plant calibration
  • Dust extraction
  • Filler handling and control
  • Aggregate heating
  • Procurement / handling of raw materials
  • Finished product storage
  • Delivery

3
Drum Mix Plant - Conventional
Hot Storage Bins
Filter Baghouse
Exhaust Fan
Primary dust collector
HMA made continuously and sent to storage silos
Bitumen Tanks
Drying and mixing drum
Belt scale
4
TWIN DRUM PLANT COUNTER-FLOW
5
Old Drum Mix Mix Plant
6
Twin Drum Plant
Plant filler storage and feed
RAP Feed
Filter Baghouse
Coating mixing drum
Aggregate feed
Finished product storage
Drying heating Drum
7
Parallel-Flow Drum-mixer Zones
Combustion
Air
Heating
Drying
Mixing
BIT.
Hot Mix Asphalt
8
Counter-Flow Drum-mixer Zones
Aggregate
9
Counter-Flow Batch Plant Dryer Zones
Combustion
Heating
Drying
Air
Aggregate
Hot Aggregate
10
Batch Plant Elements
Bitumen storage tanks
RAP Feed
Dryer Drum
Cold feed bins
11
Screens size aggregate
Hot aggregate travels up bucket elevator
12
(No Transcript)
13
Aggregate Hot Bins
14
Warren Brothers Patent Application Drawing
Original Batch Plant
15
Belt Scale Calibration
Cold feed system
Belt scale
Reference scale
16
Cold Feed Bins and RAP Bin
17
Graphing the Feeders
18
Tachometer Mounted on Tail Pulley of Cold Feed
Bin Belt
19
No Flow Paddle at Feeder Discharge
20
(No Transcript)
21
(No Transcript)
22
Induced Air Burner
23
Fuel Reticulation and Heating System
HFO Tank
In-line heater
HFO Sampling pt
24
(No Transcript)
25
Drum Flights / Lifters
26
Primary and Secondary Emission Control
Primary Dust Collector
Filtered Air
Secondary Dust Collector
Fines collected and returned
Drying Drum
Exhaust Fan
27
Primary Collector Cyclone
28
Multi-Tube Collector
Outlet tube
Gas inlet
Spin vanes
Inlet tube
Collector element
Valve
29
Discharge Housing Functions as a Knockout Box
Air
Gas flow
Optional knock down plate
Bitumen
Fines mix with hot mix asphalt
30
Cutaway Section of a Typical Baghouse
31
Pulse Jet Baghouse
Exhaust fan
Exhaust fan
Manifold
Manifold
Dust screw
Dust screw
32
Automatic Damper Controls
33
Cyclone, Screw Collector, and Hot Elevator
34
Filler Weigh-Pod After Surge Silo
35
Emission Control Summary
  • Remove particulate matter
  • Primary
  • Secondary
  • Return fines to the mix
  • Affects void content
  • Affects mix stiffness
  • Difficult to control

36
Batch plant filtration
37
Aggregate storage
38
Aggregate Storage
39
Bitumen Storage
BITUMEN TANKS ELECTRICALLY HEATED/ 24 HR
TEMPERATURE MONITOR AND CONTROL
40
Old Style Operating Cabin
41
Plant automation Modern control cabin
42
Plant automation
43
Roodepoort Op Screen
Plant Automation Operating System Graphics
44
Batch Plant Schematic
45
Batch Plant Op Screen
46
Laboratory from the past
47
Modern Asphalt Laboratory
48
Quality Control Trends Monitored
Binder Content
Voids in Mix
Filler Content
49
(No Transcript)
50
Slat Conveyor Feeding Storage Silos
51
Hot Storage Skip and Winch System
52
Storage Silo 165 t Capacity
53
Correct Loading Sequence
54
The good old days
The End
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