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General technical specification / Capacity definition

Design: Prefabricated elements for erection on site
Plant capacity: 200 t/h continual capacity
Capacity definition: Plant capacity = Ready mix capacity rating with a total of
10 % binding agent and reclaimed filler
Continual capacity = Mixing-weighing process with drying
and screening
Mineral drying and heating process with
Mineral input moisture = 3 %
Mineral temperature increase = 175 K
Screening process with fraction 0/2 mm = max. 30 %
Grain form = cubic, according to road construction standard
Grain size = max. 45 mm
Mixing-weighing process with
Number of mineral components = max. 5
Batch cycle = 80 batches/h
Binding agent content = max. 7.5 %
Filler content = max. 10 % at 1.0 t/m³ specific weight
Ready mix = without additives that extend the batch cycle
Operation = continous, with a constant mix design and
professional operation and transport management
Ambient conditions: Temperature + 2 ... + 50 �C
Altitude < 1000 mNN
Seismic zone max. 2 (DIN 4149)
Electric design: The plant is designed for 230/400 V - 50 Hz
Surface treatment: Colour = Ammann standard CI

Specification Asphalt mixing plant

01 Cold feed system
The cold feed system serves as an aggregate intermediate storage, each
component is stored in a dedicated hopper with a proportioning belt. These are
normally charged by a shovel loader. The material is then transported via transfer
belt to the drying and heating unit.
01.01 Cold feeder ADL
Metering capacity max. 200 t/h
5 Hopper
Capacity 10 m3
Dump width 3600 mm
Dump height 3100 mm
Hopper with discharge opening, supports and integrated frame for
the collection belt.
5 Hopper discharge belt
Belt width 650 mm
Distance between conveyor centers 1350 mm
Hopper discharge belt with drive, belt, galvanized belt frame and
guiding plates for aggregate transfer.
1 Hopper vibrator
01.02 Collection and transfer belt
Conveying capacity 180 t/h
Belt width 650 mm
Belt conveyor fitted with emergency stop and hand guards.
1 Drive unit
1 Belt tensioner with return roller, threaded tensioner and internal V - scraper.
17 Meters of intermediate construction, horizontal
11 Meters of intermediate construction - inclined
02 Drying and heating system
The mixed aggregates supplied from the cold feed unit are dried in a direct-fired
drum and heated to the temperature required for their further treatment. The
drum operates according to the counter flow method, which means the mixed
aggregates are conveyed towards the flame.
The drum is either charged directly by the transfer belt or by a feeder belt. Thedrum cylinder is inclined towards the drum discharge, the drum is friction driven
by drive trunnions and running rings. Flights and lifters assure that the
aggregates are split up and fed through the pre-heating, evaporation and heating
zones to the drum discharge opening. The shovels in the firing area guide the
aggregates around the flame in order not to disrupt the burner combustion.
02.01 Drum
Type T 2290
Drying capacities:
- with aggregate input moisture 3 % 180 t/h
These capacities are valid under the following conditions:
- Aggregate temperature raise 180 �C
- Aggregates with the usual drying behaviour
- Grain curves according to standard recipes
Diameter 2200 mm
Length 9000 mm
complete with drum chassis, drum cylinder with running rings, flights and lifters
Friction drive, Supporting frame and Aggregate temperature measuring.
Negative pressure sensor system in dryer drum burner wall.
(>without insulation<)
02.02 Burner device incl. Transfer pump 3 bar
(>pipe for heating oil by the customer<)
1 Burner, heating oil EL
Burner type AMB
Max. burner capacity 15,5 MW
03 Dust collection system
The Ammann filter system Ameco is a dust collection plant for the asphalt
industry. The filter reduces the dust emissions to a low level according to today's
state of the art.
The separation of dust and gas is performed in the double-oval shaped filter bags
that are hanging in the baghouse. The filler is building up as a coating on the
outside surface of filter bags. Bag cleaning is achieved by a rotating reverse air
valve mechanism. Section by section, it allows an amount of atmospheric air
through the bag thus inflating the bag. The dust coating on the outside of the
bags breaks up and drops into the collecting hopper and can be used as
reclaimed filler in the asphalt process.
The clean air is let out into atmosphere through the stack.03.01 Filter
1 Raw gas ducting
1 Pre-separator Cascade-separator with drop-out chambers
1 Filter upper part with cleaning mechanisms
Extraction volume in working-m³/h 70000 m³/h
Extraction volume 48000 Nm³/h
Filter area 737 m²
Max. dust burden onto plant 250 g/Nm³
Max. emission of dry particulate 20 mg/Nm³
1 Filterbags and cages, Aramid
Max continuous temperature 160 �C
Max. peak temperature 170 �C
1 Bottom section
1 Internal screw conveyor for combined coarse and fine filler feed
(>without insulation<)
03.02 Exhaust fan and Stack
1 Fan with drive and radial damper, Power = 110 kW
1 Stack, Height = 10 m
03.03 Sensors and controlls
1 safety temperature switch at filter inlet
1 temperature sensor at filter inlet
04 Mixing tower
The hot elevator conveys the dried and heated aggregates to the screen. The
vibration screen reclassifies the aggregates according to their grain sizes and
feeds them into the appropriate hot mineral silo compartment. The dosing flaps
proportion the aggregate components according to the selected recipe. The
mineral scale then registers their weight. Bitumen and filler are weighed out in
the same manner. Further additives are added according to their weight or
volume. The complete batch is the discharged into the mixer. During this
operation, the plant control system manages the batching sequence.
Stairs and platforms ensure that the mixing tower is easily and safely accessible.
All parts subject to wear and tear are, whenever possible, made of wear resisting
materials and can easily be exchanged.04.01 Hot elevator
Type KE II
Capacity 190 t/h
1 Head station with drive unit and maintenance platform
1 Foot station with feeder chute
20 m of shaft with chain and buckets
1 Transfer chute from the hot elevator to the screen
04.02 Reclassification
1 Screening machine VA 1840
Number of screened aggregate components 5
Max. aggregate temperature 350 �C
Total screen area 27,6 m²
Area of sand deck 5,5 m²
1 Set of screen meshes Ammann standard
1 Pneumatic drive for the change-over flap screen/bypass
04.03 Hot mineral storage
The mentioned contents of the hot mineral silo are calculated for a specific
weight of 1.6 t/m³ and an angle of repose of 37°.
However, the actual weights and angles of repose will differ from this values by
up to 25%, depending on the material. It must furthermore be considered that a
part of the silo content serves as a natural padding against wear and tear and
can thus not be evaluated as dischargeable content.
The emergency overflows of the component compartments incl. oversize are
collectivly ducted and led into the hot mix storage silo.
Each component compartment has an electro-pneumatically activated outlet
door.
The hot mineral silo has an integrated filler compartment for intermediate filler
storage.
1 Hot mineral silo (100mm insulated) 56 t
5 Continuous level sensor in component compartment
1 Intermediate filler silo for reclaimed filler, incl. level indication
Content: 300 kg
1 Pneumatic filler disintegrator for intermediate filler silo04.04 Weighing and mixing level
1 Mineral scale
Max. batch quantity 3000 kg
1 Filler scale
Max. batch quantity 300 kg
1 Bitumen scale with bottom discharge, Insulated and with electric floor heating
Max. batch quantity 325 kg
1 Mixer AMIX
Max. batch quantity 3000 kg
Min. batch quantity 750 kg
Drive 2 x 37 kW
1 Buffer container for compressed air
Content 250 l
04.05 Compressed air supply
1 Compressor with compressed air tank
05 Filler supply
The reclaimed filler which was recovered by the dedusting system of the filter
during the drying process is first conveyed mechanically (by conveyor
screws, elevator) to a buffer silo in the mixing tower from where the filler
scale can take it out again. Excess reclaimed filler is stored in the reclaimed
filler silo and can be recirculated to the filler cycle, if required.
The imported filler silo is filled by the delivery trucks own pneumatic fill
system. The displaced air in the silo as well as the conveying air are vented
into the atmosphere via an exhaust filter. The transport to the filler scale is
either effected directly through a screw conveyor or through an intermediate
elevator and buffer silo.
05.01 Filler elevator
Type FG 36
Capacity 36 t/h
1 Head and foot station
18 m of shaft with belt and buckets

05.02 Filler silo
1 Reclaimed filler silo
Content 40 m³
Diameter 2900 mm
1 Probe for continuous level indication
05.03 Reclamed filler transport
1 Screw conveyor, dedusting unit / filler elevator
1 Shutting flap at the silo discharge, manually operated
1 Cellular wheel sluice beneath silo discharge
1 Shutting flap at the sluice discharge, pneumatically operated
1 Filler return pipe, elevator discharge / silo
06 Integrated asphalt storage silo 50t
The asphalt storage silo is integrated in the mixing tower and situated directly
beneath the mixing module. It is used to store the finished asphalt and to load it
onto vehicles. There is a number of chambers to store the asphalt, and the
feeding is effected by a transfer skip. The asphalt can also be loaded directly
from the mixer onto vehicles. For this purpose, the asphalt storage silo is
equipped with a direct loading bag which is in the position to retain one or several
batches in order not to disturb the mixing operation by changing vehicles.
06.01 Asphalt storage silo
The content of the mixed material compartments are calculated at a density of
1.8 t/m³ and an angle of repose of 27°.
1 Supporting frame
Clearance height 4 m
1 Silo body 50 / 3 Chambers
1 Insulation, thickness 50 mm
1 Transfer skip
1 Stairway from level 0 to the mixing platform
Step width 600 mm

07 Bitumen supply
The thermal oil heated bitumen supply comprises the storage of binding agents
of different qualities. It also heats up the binding agent to the processing
temperature and leads it to the mixing process. On account of intelligent heating
controls with temperature monitoring, the heating s of tanks, pipe work, fittings
and pumps only require minimum energy. The mostly thermal bridge free
insulation results in insignificant temperature losses. An elaborate pipe scheme
for the supply and discharge system maintains the operating temperature in
pipes and fittings during the operation.
0701 Bitumen storage tank with time/temperature controlled heating
Tank in container execution, not stackable, with mineral-wool insulation and
trapezoidal corrugated sheet-metal cover, with man hole and all necessary
connection nozzles.
2 Storage tank box 55,
Nominal content 55 m³
Insulation thickness 200 mm
2 Medium-temperature sensor with immersion cover
2 Level sensor, continuous
07.02 Discharge and conveying line, incl. insulation
Double-walled pipeline with thermal oil heating. The discharge line includes the
stop-valve at the tank connection. The conveying line to the bitumen-dosing unit
includes the change-over valve controlled by the mixing process.
2 Discharge line between tank and discharge pump
1 Pump system (electrical heated)
Capacity 480l/min
Suction- and pressure flanges with shut-off-flaps manual
1 Conveying line between discharge pump and dosing unit
(electrical heated)
07.03 Thermal oil heating system
1 Thermal Oil Heater WTa� 300
Capacity 300 kW
Supply Tank
Expansion Tank
Burner for diesel fuel oil08 Electrification & Control System
Microprocessor control for the operation, control and display of the complete
Ammann scope of delivery, storage of recipes, plant parameters and production
and operational data. The standard equipment comprises a workstation including
a high resolution full graphic monitor, keyboard, mouse, printer for production
protocols and modem.
08.01 Computer hardware
1 PC
1 Flat screen (TFT)
1 Modem
1 UPS, uninterrupted power supply
1 Printer
08.02 Software
1 Basic control system for 1 asphalt mixing plant
08.03 Method of Electrical protection
Earthing of the plant electricity
08.04 Switch gears
1 Module for cold feed unit
1 Module for drum
1 Module dedusting unit / filler supply
1 Module mixing tower
1 Module for asphalt storage silo
1 Module for bitumen supply E-Bit
1 Module for auxiliary operations
1 Set of cables for permanent cabling

08.05 Container
1 Control container
Length 6058 mm
Width 2438 mm
Height 3080 mm
Air condition
1 Safety interlocks for maintenance doors
09 Preparation for transport, erection, commissioning
09.01 Erection
2 Supervisors for mechanical and electrical assembly and commissioning of
the Ammann scope of delivery for 4 weeks. Additional times will be charged
separately. The customer provide hotel, accommodation and domestic
transport for Amman s engineers, necessary crane with full set of slings, 4
fitters, 2 welders and 3 electricians, tools for Amman s supervisors and
customers staff.
09.02 Packing and Loading
Packing and loading the Ammann scope of delivery.