Counter-Flow Drum Mixer

©2008 CEI Enterrprises, Inc. Specifi cations subject to change without prior notice or obligation.

CEI ENTERPRISES,INC. an Astec Industries Company

— 2 —

Control house, drag conveyor and 100-ton surge bin.

Drag conveyor is lined with chrome carbide for durability.

Segmented, bolt-on sprockets for easy fi eld maintenance.

Standard Control House

Control panel inside control house. Portable baghouse with caged ladder & handrails.

— 7 —

The air-conditioned control house is trailer-mounted for easy portability. It also includes heating, lights, internal power outlets and a sliding ticket window. All plant controls are mounted on a centralized panel inside the control house. A PLC (program-mable logic con-troller) controls mixing.A larger control house (shown on page 3) is available as an option.

The baghouse is mounted on its own portable chassis and includes air compressor, internal collecting auger, caged ladder and handrails. � e lower section of the baghouse forms a hopper for collection of fi nes.An inertial separator mounted at the baghouse inlet re-moves the majority of dust from the dryer prior to the fi lter bags. Remaining dust and small particulate adheres to fi lter bags that are suspended internally from the baghouse roof. Powerful bursts of air are injected into the fi lter bags to make the dust break away and fall into the hopper below. � e collecting auger that runs the full length of the hopper car-ries this dust, (or fi nes), out of the baghouse. Fines are then returned to the drum mixer by a series of screw conveyors.Access panels at the top of the baghouse allow easy chang-ing of fi lter bags. � e baghouse also features multiple access doors for internal inspection and maintenance.

The surge bin is mounted on a portable chassis and is a crane-erected design. It is available in either 50-ton or 100-ton capacity. Each size includes its own drag conveyor with batcher. � e drag conveyor features chrome-carbide liner for durability, a heavy-duty drag chain, and segmented sprockets for easy maintenance. � e conveyor also features a full-length stairway with platform around the batcher.

— Surge Bin and Drag Conveyor —

— Control House — — Baghouse —

Quality Hot Mix Asphalt. Simplifi ed.� e RAP King™ drum mixer from CEI off ers hot mix asphalt producers a cost-eff ective, well-built and proven counter-fl ow design capable of producing 180 tons per hour. It can produce mixes that include up to 50% RAP (Recycled Asphalt Pavement) with no added fuel cost.

Why RAP? Because it’s less expensive. It’s the same rock. And, it is already asphalt-coated. Many producers are realizing the lower material costs from using RAP compared to virgin aggregate alone. Whereas virgin aggregate must be mined from the earth, RAP is easily obtained when existing roads are milled for re-paving. And whether it comes from a quarry or a milled road, it’s the same rock. For that matter, the rock already has AC (asphalt cement) on it that can be incorporated into the new mix.

How can it mix 50% RAP? To put it simply, because it’s energy-effi cient.� e design of the RAP King drum mixer uses a counter-fl ow aggregate dryer that is surrounded by an outer mixing chamber. � is design allows residual heat from the drying drum to be transferred outward to the mixing chamber. Since considerable heat is involved in the drying process, a substantial amount of that heat is transferred to the full length of the mixing chamber. � ere is enough heat to overcome the heat absorbed by the incoming cold RAP. No additional heating is needed to maintain proper mixing temperature.

Residual heat from the inner drying drum is transferred outward to the mixing chamber.

— 3 —

RAP King drum mixer Cold-Feed Bins

RAP Bin, Screen & Conveyor Baghouse and Control House

Drag Conveyor and Surge Bin

Cold-feed bins with conveyor retracted for travel.

Scalping screen on incline conveyor.

RAP bin & conveyor feed RAP to drum mixer.

RAP bin unit includes its own scalping screen.

— 6 —

EXCEPTIONALLY LOW EMISSIONS

Airfl ow through the RAP King drum mixer cre-ates a strong induced draft in the mixing chamber. When steam and fumes are released from the RAP as it mixes with super-heated virgin aggregate, they are drawn out of the mixing chamber and back into the combustion area where they are incinerated.

EXCEPTIONALLY DURABLE

CEI products are well-made, designed for strength, and constructed of heavy-duty materials. You’ll get all the components you need, without paying for the fl uff that raises your overhead. And, CEI backs its products with worldwide service and parts support.� e drum mixer and all other plant components are chassis-mounted for easy portability. � e entire plant is designed for rapid setup and takedown.

The 8’x12’ cold-feed bins are mounted on a chassis for easy portability and rapid setup. � e unit includes an inte-gral collecting-conveyor that runs underneath the aggregate bins. � e conveyor includes an inclined extension that can be folded into a retracted position for travel.� e cold-feed bins feature steeply-angled side walls for reli-able feeding of aggregate. � e unit is available with either 3 or 4 bins. All motors and switches are pre-wired & factory-tested. Quick-plug connectors aid in rapid plant setup.Virgin aggregate is carried by the unit’s collecting-conveyor to a scalping screen. � e scalping screen is mounted on a separate incline conveyor. Oversized material is removed by the screen and drops away to the ground. � e incline con-veyor carries the screened aggregate to the drum mixer. � e conveyor includes an integral scale to monitor fl ow of mate-rial to the mixer.

The RAP bin is also mounted on its own portable chassis and includes an integral scalping screen and in-cline conveyor. All motors and switches are pre-wired and factory-tested.� e RAP bin features steeply-angled side walls and a wider opening than the cold-feed bins. An air canon is included to prevent material from sticking to the side walls and to ensure even, continuous fl ow.A collecting conveyor underneath the bin drops RAP onto the unit’s scalping screen. Oversized material is removed by the screen and drops away to the ground. � e unit’s incline conveyor then carries the screened RAP directly to the mixing chamber of the RAP King drum mixer.Multiple bins are available to accomodate diff erent gradations of RAP. � is allows for better control of gradations and asphalt content at higher recycle rates.

— Cold Feed Bins — — RAP Bin —

— 4 — — 5 —

AC Inlet

Access to mixing chamber.Drop-out holes in drum

RAP inlet Outlet chute

RAP King drum mixer with optional low-NOx burner

�e standard burner used is a 49.3-million Btu/hour, gas-fired burner. Special low-NOx burners, oil-fired or combination burners are available options.2. Dry aggregate drops to the outer mixing chamber. When the dry virgin aggregate reaches the burner end of the dryer, it then enters the outer mixing chamber through a series of holes at the end of the drum.

3. RAP is added to the mix through a dedicated RAP inlet to the outer mixing chamber. �e RAP inlet chute is mounted near the top of the drum. Oversized RAP that has not already been screened is removed through a special drop-out chute mounted on the RAP conveyor.

The RAP King drum mixer features a proven design for making hot mix asphalt, including mixes with up to 50% RAP. �e design uses a counter-flow aggregate dryer that is surrounded by an outer mixing chamber. Residual heat from the inner drying drum is transferred outward to the mixing chamber, heating its full length.1. Virgin aggregate enters the dryer by way of a conveyor mounted on the gooseneck of the drum’s portable chassis. Aggregate passes into the drum through an opening in the base of the knock-out box.�e knock-out box features an access platform and doorway to allow for inspection and maintenance when the drum is not in operation.

Conveyor, knock-out box and flights inside drying drum.

Once inside the drum, aggregate passes through a series of flights that properly veil the rock through a burner flame to remove moisture.

— The Drum Mixer —

1. Virgin aggregate enters dryer

2. Dry aggregate drops to outer mixing chamber

3. RAP is added to mix5. Fines are added to mix

4. Liquid AC enters

6. Mix exits

Emissions are pulled back into combustion area and burned

4. Liquid AC is added through an inlet manifold mounted on the side of the drum. �e AC is me-tered with high accuracy and preci-sion by a special two-pump asphalt meter. Mass-flow type meters are also available. 5. Fines are added to the mix through a dedicated inlet on the side of the drum. Fines are captured in the baghouse and are returned to the drum mixer by a series of screw conveyors.

Screw conveyors return fines from the baghouse to the mixing chamber.

Liquid AC, virgin aggregate, RAP and fines are all mixed together as they travel the length of the outer mixing chamber. �e elongated mix-ing chamber of the RAP King drum mixer offers longer mix time than parallel-flow mixers of similar length. �is proven design produces a better, more homogeneous mix than other drum mixers on the market. �e RAP King’s outer mixing chamber features a full-length, hydraulically-opened access door for inspection and mainte-nance when the drum is not in operation.

6. Hot mix asphalt exits the mixing chamber through an outlet chute on the side of the drum. �e outlet chute drops the mix into the base of the plant’s drag conveyor.

— 4 — — 5 —

AC Inlet

Access to mixing chamber.Drop-out holes in drum

RAP inlet Outlet chute

RAP King drum mixer with optional low-NOx burner

�e standard burner used is a 49.3-million Btu/hour, gas-fired burner. Special low-NOx burners, oil-fired or combination burners are available options.2. Dry aggregate drops to the outer mixing chamber. When the dry virgin aggregate reaches the burner end of the dryer, it then enters the outer mixing chamber through a series of holes at the end of the drum.

3. RAP is added to the mix through a dedicated RAP inlet to the outer mixing chamber. �e RAP inlet chute is mounted near the top of the drum. Oversized RAP that has not already been screened is removed through a special drop-out chute mounted on the RAP conveyor.

The RAP King drum mixer features a proven design for making hot mix asphalt, including mixes with up to 50% RAP. �e design uses a counter-flow aggregate dryer that is surrounded by an outer mixing chamber. Residual heat from the inner drying drum is transferred outward to the mixing chamber, heating its full length.1. Virgin aggregate enters the dryer by way of a conveyor mounted on the gooseneck of the drum’s portable chassis. Aggregate passes into the drum through an opening in the base of the knock-out box.�e knock-out box features an access platform and doorway to allow for inspection and maintenance when the drum is not in operation.

Conveyor, knock-out box and flights inside drying drum.

Once inside the drum, aggregate passes through a series of flights that properly veil the rock through a burner flame to remove moisture.

— The Drum Mixer —

1. Virgin aggregate enters dryer

2. Dry aggregate drops to outer mixing chamber

3. RAP is added to mix5. Fines are added to mix

4. Liquid AC enters

6. Mix exits

Emissions are pulled back into combustion area and burned

4. Liquid AC is added through an inlet manifold mounted on the side of the drum. �e AC is me-tered with high accuracy and preci-sion by a special two-pump asphalt meter. Mass-flow type meters are also available. 5. Fines are added to the mix through a dedicated inlet on the side of the drum. Fines are captured in the baghouse and are returned to the drum mixer by a series of screw conveyors.

Screw conveyors return fines from the baghouse to the mixing chamber.

Liquid AC, virgin aggregate, RAP and fines are all mixed together as they travel the length of the outer mixing chamber. �e elongated mix-ing chamber of the RAP King drum mixer offers longer mix time than parallel-flow mixers of similar length. �is proven design produces a better, more homogeneous mix than other drum mixers on the market. �e RAP King’s outer mixing chamber features a full-length, hydraulically-opened access door for inspection and mainte-nance when the drum is not in operation.

6. Hot mix asphalt exits the mixing chamber through an outlet chute on the side of the drum. �e outlet chute drops the mix into the base of the plant’s drag conveyor.

— 3 —

RAP King drum mixer Cold-Feed Bins

RAP Bin, Screen & Conveyor Baghouse and Control House

Drag Conveyor and Surge Bin

Cold-feed bins with conveyor retracted for travel.

Scalping screen on incline conveyor.

RAP bin & conveyor feed RAP to drum mixer.

RAP bin unit includes its own scalping screen.

— 6 —

EXCEPTIONALLY LOW EMISSIONS

Airfl ow through the RAP King drum mixer cre-ates a strong induced draft in the mixing chamber. When steam and fumes are released from the RAP as it mixes with super-heated virgin aggregate, they are drawn out of the mixing chamber and back into the combustion area where they are incinerated.

EXCEPTIONALLY DURABLE

CEI products are well-made, designed for strength, and constructed of heavy-duty materials. You’ll get all the components you need, without paying for the fl uff that raises your overhead. And, CEI backs its products with worldwide service and parts support.� e drum mixer and all other plant components are chassis-mounted for easy portability. � e entire plant is designed for rapid setup and takedown.

The 8’x12’ cold-feed bins are mounted on a chassis for easy portability and rapid setup. � e unit includes an inte-gral collecting-conveyor that runs underneath the aggregate bins. � e conveyor includes an inclined extension that can be folded into a retracted position for travel.� e cold-feed bins feature steeply-angled side walls for reli-able feeding of aggregate. � e unit is available with either 3 or 4 bins. All motors and switches are pre-wired & factory-tested. Quick-plug connectors aid in rapid plant setup.Virgin aggregate is carried by the unit’s collecting-conveyor to a scalping screen. � e scalping screen is mounted on a separate incline conveyor. Oversized material is removed by the screen and drops away to the ground. � e incline con-veyor carries the screened aggregate to the drum mixer. � e conveyor includes an integral scale to monitor fl ow of mate-rial to the mixer.

The RAP bin is also mounted on its own portable chassis and includes an integral scalping screen and in-cline conveyor. All motors and switches are pre-wired and factory-tested.� e RAP bin features steeply-angled side walls and a wider opening than the cold-feed bins. An air canon is included to prevent material from sticking to the side walls and to ensure even, continuous fl ow.A collecting conveyor underneath the bin drops RAP onto the unit’s scalping screen. Oversized material is removed by the screen and drops away to the ground. � e unit’s incline conveyor then carries the screened RAP directly to the mixing chamber of the RAP King drum mixer.Multiple bins are available to accomodate diff erent gradations of RAP. � is allows for better control of gradations and asphalt content at higher recycle rates.

— Cold Feed Bins — — RAP Bin —

— 2 —

Control house, drag conveyor and 100-ton surge bin.

Drag conveyor is lined with chrome carbide for durability.

Segmented, bolt-on sprockets for easy fi eld maintenance.

Standard Control House

Control panel inside control house. Portable baghouse with caged ladder & handrails.

— 7 —

The air-conditioned control house is trailer-mounted for easy portability. It also includes heating, lights, internal power outlets and a sliding ticket window. All plant controls are mounted on a centralized panel inside the control house. A PLC (program-mable logic con-troller) controls mixing.A larger control house (shown on page 3) is available as an option.

The baghouse is mounted on its own portable chassis and includes air compressor, internal collecting auger, caged ladder and handrails. � e lower section of the baghouse forms a hopper for collection of fi nes.An inertial separator mounted at the baghouse inlet re-moves the majority of dust from the dryer prior to the fi lter bags. Remaining dust and small particulate adheres to fi lter bags that are suspended internally from the baghouse roof. Powerful bursts of air are injected into the fi lter bags to make the dust break away and fall into the hopper below. � e collecting auger that runs the full length of the hopper car-ries this dust, (or fi nes), out of the baghouse. Fines are then returned to the drum mixer by a series of screw conveyors.Access panels at the top of the baghouse allow easy chang-ing of fi lter bags. � e baghouse also features multiple access doors for internal inspection and maintenance.

The surge bin is mounted on a portable chassis and is a crane-erected design. It is available in either 50-ton or 100-ton capacity. Each size includes its own drag conveyor with batcher. � e drag conveyor features chrome-carbide liner for durability, a heavy-duty drag chain, and segmented sprockets for easy maintenance. � e conveyor also features a full-length stairway with platform around the batcher.

— Surge Bin and Drag Conveyor —

— Control House — — Baghouse —

Quality Hot Mix Asphalt. Simplifi ed.� e RAP King™ drum mixer from CEI off ers hot mix asphalt producers a cost-eff ective, well-built and proven counter-fl ow design capable of producing 180 tons per hour. It can produce mixes that include up to 50% RAP (Recycled Asphalt Pavement) with no added fuel cost.

Why RAP? Because it’s less expensive. It’s the same rock. And, it is already asphalt-coated. Many producers are realizing the lower material costs from using RAP compared to virgin aggregate alone. Whereas virgin aggregate must be mined from the earth, RAP is easily obtained when existing roads are milled for re-paving. And whether it comes from a quarry or a milled road, it’s the same rock. For that matter, the rock already has AC (asphalt cement) on it that can be incorporated into the new mix.

How can it mix 50% RAP? To put it simply, because it’s energy-effi cient.� e design of the RAP King drum mixer uses a counter-fl ow aggregate dryer that is surrounded by an outer mixing chamber. � is design allows residual heat from the drying drum to be transferred outward to the mixing chamber. Since considerable heat is involved in the drying process, a substantial amount of that heat is transferred to the full length of the mixing chamber. � ere is enough heat to overcome the heat absorbed by the incoming cold RAP. No additional heating is needed to maintain proper mixing temperature.

Residual heat from the inner drying drum is transferred outward to the mixing chamber.

Counter-Flow Drum Mixer

©2008 CEI Enterrprises, Inc. Specifi cations subject to change without prior notice or obligation.

CEI ENTERPRISES,INC. an Astec Industries Company