E3 Rap-Star Series

Counter-flow Drum Mixers

The E3 series of continuous counter-flow drum mixers combines high productivity and high RAP percentage capabilities with simplicity and reliability.

Available as portable drums in capacities from 200 to 500tph and as relocatable and stationary drums in capacities from 200 to 600tph.

A continuous full-length main shell is surrounded by an outer RAP drum that fully heats RAP before mixing it with virgin aggregate and AC.

Capable of handling high percentage RAP mixes E3’s are available with trunnion drive or chain drive and are an ideal retrofit for existing counterflow plants.

  • Reduced fuel usage due to efficient heat transfer
  • Reduced cost per ton through increased RAP usage
  • Easy retro-fit to existing CMI, Cedarapids and Standard Havens drum frames
  • Fully bolted flighting for ease of maintenance
  • Easy access to the enhanced RAP mixing zone from inside or outside of drum
  • Abrasion resistant materials throughout to increase working life

Features

  1. Replaceable Paddles

    Replaceable paddles can discharge material centrally or to either side depending on plant layout

  2. Heat Transfer Paddles

    Radient heat transfer panels (stainless in the combustion zone) keep RAP from the direct flame while providing excellent conductive heat transfer.

  3. RAP Entry

    Cold, wet RAP is introduced into the outer shell, where it is blended with a proportion of hot aggregate and hot dust removing excess moisture before the introduction of asphalt cement (bitumen).

  4. Inlet Spirals

    Inlet spirals effectively move the cold virgin aggregate into the drying zone no matter what the slinger conveyor position.

CMI Roadbuilding E3 Early Entry RAP Counterflow Drum Mixer
Color denotes steel alloy construction:
Stainless Steel Key
Stainless Steel
T1A Steel Key
T1A Steel
Steel Key
Steel
  1. Mixing Zone

    The mixing zone uses a castle flight design from CMI Magnum drums resulting in industry leading mixing.

  2. Tee-Pee Flights

    “Tee-Pee” flights (Stainless in the combustion zone) protect the primary drum shell from heat and allow virgin aggregate to pass along the drum.

  3. Insulator Flights

    Insulator flights (Stainless in the combustion zone) prevent aggregate veiling in the combustion zone, increasing efficiency and stopping flame impingement.

  4. Saw Toothed Flights

    Saw toothed lifting flights result in a consistent curtain of material being dried, reducing baghouse temperatures and increasing efficiency.


CMI E3 Asphalt Plant Drum Mixer Flow Diagram
  1. Material Blending

    E3’s have the industry’s longest material blending zone, where RAP and virgin aggregates mix together.

  2. Emission Control

    Unburned hydrocarbons from the mixing zone are drawn into the exhaust gas stream and incinerated.

  3. Heat Transfer

    The E3 design features three heat transfer zones: convective, radiant and conductive


  • CMI E3 Asphalt Plant Drum Upgrades

    Plant Upgrades

    E3 drums can be easily retro-fitted to existing CMI, Cedarapids and Standard Havens drum frames. Alternatively an E3 drum upgrade will improve the efficiency and performance of other manufacturers asphalt plants.

  • CMI E3 Asphalt Plant High RAP Capability

    High Rap Cabability

    By feeding RAP into the outer shell and mixing it with hot, dry virgin aggregate for the length of the combustion zone, the E3 achieves enhanced RAP mixing before introduction of liquid bitumen/asphalt cement, making the E3 capable of 50%+ RAP mixes.

  • CMI E3 Asphalt Plant Consistent Veiling and Mixing

    Consistent Veiling & Mixing

    The design and configuration of the E3 flighting resulting from years of experience of CMI, Standard Havens and Cedarapids dryers & drum mixers, optimizes efficient drying and mixing whatever the material.

Options

Trunnion (friction) drive or chain drive
Integrated patented warm mix asphalt system
Various flighting arrangements to suit location and application
Various burners available to suit local emissions criteria
Special suspensions and air-ride
Self-contained hydraulic set-up system
Can be retro-fitted to existing CMI, Cedarapids® and Standard Havens® plants

Specifications

Units

E3-200

E3-300

E3-400

E3-500

E3-600

PRODUCTION Capacity

Output

tph

200

300

400

500

600

mtph

181

272

363

454

544

DrUM MIXER

MAIN Drum Diameter

ft / ins

6’ 4”

7’ 4”

8’ 4”

9’ 3”

10’ 3”

mm

1930

2230

2540

2830

3124

RAP ENTRY Diameter

ft / ins

9’ 4”

10’ 4”

11’

11’ 10”

13’ 4”

mm

2845

3150

3350

3610

4064

Drum Length

ft / ins

36’

42’

47’ 6”

47’ 6”

47’ 8”

mm

10973

10973

14480

14480

14529

DrUM Drive

hp

4 x 20

4 x 25

4 x 40

4 x 50

4 x 60

kW

4 x 15

4 x 19

4 x 30

4 x 37

4 x 45

Air Volume

Total

ft³ / min

32000

48000

64000

80000

96000

m³ / min

906

1359

1812

2265

2718

Burner

Burner Type

-

Fuel Oil

Fuel Oil

Fuel Oil

Fuel Oil

Fuel Oil

Capacity

x106 BTU / hr

82

100

135

153

200

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