AMP (ASPHALT MIXING PLANT)
THERMAL OIL ASPHALT MIXING PLANT
Hot Oil Heater Boiler (Thermal oil heater)
Extra wide combustion chamber surface to avoid flames that can damage the surface of the coil. Does not require a water treatment plant and does not require chemical dosing pump in operation, making it more efficient in operation. The use of mineral oil as a transfer medium does not cause dirt deposits, scaling, is not corrosive and stable at operating temperatures.
Indira Thermal is assembled from a series of imported component materials that are known to be reliable and very high quality. Each component already has a representative in Jakarta and is easily available in the market so there is no concern about the spare parts. Each manufacturing process is carried out according to strict standard procedures and Quality Control, thus making IndiraThermal a robust and reliable Oil heater.
Perfect handling and supported by good service and supported by professional technicians is a guarantee of the quality of this product. Free of import procedures, the delivery schedule can be adjusted to the needs of the customer with an integrated production process system. Guaranteed after sales, free commissioning and start up
Construction of Indira Thermal Badan Indira thermal is the core of oil heater. The inner part is made a multi helical coil system and at the end of the coil is put together in two headers as the hot oil inlet and outlet. IndiraThermal coil construction is made using international standard boiler pipes which are rolled with mechine bending pipes without using heating so as not to damage the chemical structure composition of the pipe material. On the outside of the IndiraThermal body in isolation using rockwool to increase efficiency and coated with aluminum foil as a wall on the outside. IndiraThermal is equipped with a control panel that is useful for facilitating operators to operate IndiraThermal.
Expantion Tank Expantion Tank Expantion Tank is a combination of Deaerator tanks, buffer tanks and Expantion tanks. With a unique combination of these three tanks, the top layer of oil associated with the air will always be cooler so that the chance of oil oxidation is greatly reduced. Expantion tanks function to accommodate the expansion of heating fluid, remove the air that is confined in the installation and prevent capitation in the circulation pump.
Circulation Pump Circulation pump serves to drain heating fluid in the installation. according to the size and pump capacity adjusted to the Indira thermal design. Pump capacity determines the shape of the flow of heating fluid inside the coil. The flow in the Indirat hermal must be turbolent, this is useful to avoid damage to heating fluid and coil in the body of Indirat hermal. The circulation pump can operate up to a max temperature of 350 oC. Control Panel The control panel is the controlling center of IndiraThermal. In this panel there are several switches and lights to operate the burner and circulation pump automatically. In the control panel there are also instruments and indicators that function to regulate, set points to monitor and control Indirat hermal. Panel control in IndiraThermal.
Safety Device Digital temperature controls, low controls switches, Automatic burner controls Chimney temperature control, Pressure gauge, Pilot lamp indicator, Alarm How it works IndiraThermal All installations must be filled with heating fluid to the control level of the expantion tank. to the Indirat hermal body then process and return to the expantion tank. After the circulation flow of heating fluid is stable, the burner will light up and burn the coil inside the Indirat hermal body so that the heating liquid becomes hot and the heat is flowed to the process. the burner will automatically turn off and will turn on again after the temperature drops.
This article I made is very simple, for beginners who want to know how AMP works,
sorry if there are many shortcomings,
Matters relating to asphalt mixing unit equipment
heat and description of the functions and workings of parts or components
Terms and definitions:
is a set of equipment that produces a product in the form of asphalt mixture
hot. AMP stands for Asphalt Mixing Plant
aggregate supplier of cold bin using a chain as a driving device
aggregate supplier of cold bin using conveyor belt (conveyor belt)
1. Cold bar (cold bin)
container of several cold aggregate fractions
2. Hot bin
reservoir of several hot aggregate fractions
3. Hot paved mixture
mixture consisting of an aggregate combination mixed with asphalt.
Mixing is done so that the aggregate surface is covered with asphalt
in uniform. To dry aggregate and obtain the asphalt viscosity
sufficient in mixing and doing it, then both must
each heated at a certain temperature
4. Push pour (hopper)
pour funnel to weigh hot aggregate
5. Cold valve (cold elevator)
bowl runs cold aggregate supplier
6. Hot elevator (hot elevator)
bowl runs hot aggregate supplier
aggregate supplier unit from cold bin to dryer
8. Accommodation filler (filler storage)
tub used to accommodate fillers
aggregate and asphalt mixers in hot conditions
10. Ignition (burner)
a tool used to heat and dry the aggregate on the dryer
11. Air regulator (air lock damper)
air regulator that serves to regulate air during ignition
a tool to regulate the length of mixing dry and wet paved inside mixturemixer
drum for aggregate dryer
14. Vibrator (vibrator)
vibrating device placed near the door of the cold bin opening and filter
15. dust collector
dust collection unit from aggregate drying
16. Doors of cold bin openings (cold bin gate)
door openings for removing aggregates from cold bin
17. Screen (screen)
sieves for aggregate granules according to each group size (fraction)
18. Hot screen
hot aggregate filter unit
container as a means of weighing the amount of hot aggregate
20. Flight cup
iron pieces inside the drying drum mounted on the drying wall with
temperature control device that does not use mercury
a tool for weighing hot aggregates, filers and hot asphalt
23. Asphalt control unit
tool located on the asphalt weighing tank to control the supply of asphalt to
The function and workings of hot asphalt mixing unit equipment
Hot-type asphalt mixing unit equipment (type batch)
In the type of dose or type batch, the mixing process is carried out every time
according to the number of batches (batch type).
Hot aggregate mixing with hot asphalt on asphalt mixing equipment
batch type (AMP) occurs in the mixer or pugmill after a certain amount
hot aggregate consisting of several fractions or only one fraction
weighed in a certain amount of weight poured into the pugmill later
sprayed hot asphalt into a certain amount according to the formula
Important main components in hot asphalt mixing equipment (AMP) types
dose (batch type) is:
Cold Bin (Cold Bin)
This cold bin or cold bin is the place to hold aggregate material from
each fraction ranging from fine aggregate to coarse aggregate needed in
producing hot asphalt or hotmix mixture each aggregate fraction is accommodated
in each tub individually. The point is so much
the aggregate of each fraction needed for the production of asphalt mixture
heat according to the work mix formula (Job Mix Formula) planned already
can be arranged at the time of expenditure from cold bin.
This cold bin is tapered with more filling surfaces on the top
width compared to the expenditure surface at the bottom.
The feasibility check in this section concerns:
a) Adjustment of cold aggregate output door openings to obtain aggregate
cool a certain amount according to what was planned in one unit
To produce one type of hot asphalt mixture of 30 tons per hour,
with mixtures consisting of coarse aggregate of 60% and aggregate
fine by 35%, the coarse aggregate requirement is 60% x
30 tons per hour = 18 tons per hour.
For the above example, it is necessary to check or check the feasibility
large bin door openings roughly aggregate at the speed of the conveyor belt
If at one position the door openings have already been measured the aggregate amount
the exit from the door is the same as what is needed per hour, then give
the sign on the door and on the wall of the opening of the bin that shows that on
the indicator for the aggregate that came out was 18 tons per hour.
Likewise for bin from other cold aggregates (in this example aggregate)
b) Adjusting the rotation speed of the aggregate drive electric motor.
Usually found in hot asphalt mixing equipment (AMP) with the system
automatic control. So much or at least the aggregate comes out of the bin and
conveyor is regulated by changing the rotational speed of the electric motor
conveyor drive. The door to the expenditure opening is not changed.
Cold aggregate carrier
Cold aggregates from several fractions that have been accommodated on conveyor belts
the collector (Collecting Belt Conveyor) is then taken to pour into
dryer or dryer carried by conveyor belt (conveyor belt)
others, or by being carried by cold elevators (cold elevators). Elevator
This cold or cold elevator is a small bowl or bucket bucket
mounted on a rotating chain up to the top, where after reaching the top
cold aggregates in these bowls will spill and
enter into a dryer.
Flowing cold aggregates from the cold bin into the dryer or dryer
walk in the open air. This is intended to provide an opportunity
evaporation of water in cold aggregate so that it will reduce levels
The smooth flow of cold aggregate will have an effect on production
hot mixture. The things that need to be considered are the mixing of fractions
different aggregates in cold bin because there are no boundaries between at
mouth (upper part) cold bin with one another, besides that
the capacity of a conveyor belt and / or cold elevator (cold elevator) must be sufficient for
bring a cool amount of aggregate every hour according to the plan
predetermined production (eg 30 TPH or 50 TPH or other).
This dryer is cylindrical with a certain length and diameter based on
planned maximum production capacity per hour.
Laying the drying cylinder above 2 (two) pairs of rotary roller bearings and cylinders
this dryer in the drying process the aggregate moves to rotate, through the wheel
teeth around the cylinder connected to an electric motor.
On the inside of the wall of the drying cylinder are welded blades made of
concave steel plate or commonly called lifting flights.
These blades are placed so that they can lift the aggregate
which is being drained upwards and simultaneously drops it so that it aggregates
the fall can form a curtain. Heating aggregate in the cylinder
Dryer is carried out using a flamethrower or burner
which is placed on the face of the tip of the hot aggregate dryer
With a high enough pressure the diesel is sprayed through a nozzle on the burner
into the drying cylinder. For the perfection of ignition and to regulate
As far as the nearby burst of fire from the burner, additional pressure is needed
the air obtained from the blower mounted together with the burner.
Addition of diesel fuel pressure and wind pressure from the blower will
add the amount of fuel consumed and will obviously add
the calories produced, and increase the reach of the fire, so
can add aggregate heat and accelerate the decrease in aggregate water content.
This setting of fire from a flamethrower or burner is not allowed to be too high
because it will affect the characteristics of the aggregate, which is aggregate to
brittle and broken because it’s too hot.
To protect the heat from fire on this burner, it is around
a protective wall mounted nozzle made of fireproof stone. The shape of the curtain from
the falling aggregate provides efficiency in heating and
evenly distributed aggregate.
A dryer or dryer is placed in an inclined position, to give
opportunity for cold aggregates to be poured into dryers from
one end (which is located higher), can come out again from the end
others (which are located lower) after going through the heating process and
drying for a certain amount of time.
The tilt angle of the drying cylinder has been determined by the manufacturer
based on the production capacity design plan and production quality design plan
what you want to produce.
The greater the slope angle (greater than the slope angle that has been
determined by the factory), will cause the incoming aggregate to quickly exit again,
so that the cold aggregate is warmed up shortly. The result is
the aggregate out the temperature is still low and the water content is still sufficient
high. Conversely, if the slope is lower, then aggregate too long
in a cylinder which results in an aggregate temperature too high, but per capacity
the clock is low, so the cylinder will quickly fill up with cold aggregate.
The slope of the dryer cylinder or dryer averages between 3
up to 50
Dryer dryer temperature capacity is up to 1000C Temperature,
aggregate results of drying should not fluctuate 1750C (+ 5
0C) from temperature
the dryer is targeted.
Hot elevators or hot elevators serve as hot aggregate carriers
come out of the drying cylinder or dryer into a hot or hot sieve
screening units to be sorted according to the size of each faction.
This hot elevator is a small bowl or bucket
mounted on a rotating chain up to the top, where after reaching the top
the hot aggregate in the small bowls was spilled upwards
hot sieve to be separated according to the size of the fraction. This elevator is hot
has a cover (protective housing) that functions as a protector against
loss of heat from the aggregate beneath it at the same time becomes dust dust
Hot Bin (Hot Bin)
Hot bin is a hot aggregate shelter after escaping
from the heat filter. The heat aggregates that pass from the filter are respectively
each faction will fill in a separate room that has been separated inside
hot bin. So in this hot bin there are separation walls
separates each hot aggregate fraction.
Generally for hot or mixed type asphalt mixing equipment (AMP) or
the hot bin type batch is divided into 4 separate rooms each
intended for shelter each of the aggregate fractions individually results from
The capacity of each room (compartment) is adjusted by percentage
the composition of the aggregate mixture in the hot asphalt mixture is associated with
production capacity of hot asphalt mixing equipment (AMP)
Weigh Bin (Weigh Bin)
Weighing bin or weigh bin is a bin where it is accommodated and weighed
the aggregate of each aggregate fraction needed for each mixing or
the batch before the weighing bin is operated must be checked by feasibility
meteorological service proven by a feasibility check certificate. In
the bottom of the bin is an expenditure door that can be opened and closed
manually or automatically.
This discharge door will be opened to remove the hot aggregate
stored in it after mixing or empty pugmill (mix that
In the mixer or pugmill, these are all material (in hot conditions)
aggregates and asphalt are mixed to produce a product in the form of asphalt mixture
hot or hotmix.
All materials in hot conditions are mixed in the pugmill with
wear stirring arms or paddles with the paddle tip on
the ends are mounted on 2 rotating axes in opposite directions (twin shafts). Axis
it is rotated by an electric motor.
To be able to produce a good mixture, the pedal with the tip must be deep
good condition, and no clearance between the tip of the tip and the wall
more than 1.5 times the largest aggregate size, or not greater than 2 cm,
except if the maximum nominal size of the aggregate used is greater than
The mixing process can be divided into 2 types of mixing, namely mixing
dry and wet mixing.
The intended dry mixing is aggregating stirring from various fractions
which is poured from weigh bin.
Wet mixing is stirring during (after) mixed with heat
The stirring time is generally not too long, ± 45 seconds. Time
stirring if too fast will result in less mixing
perfect, the aggregate surface is not covered with asphalt. Whereas if
too long will cause a decrease in the temperature of the hot asphalt mixture
besides that it also decreases its production capacity. It can also result in segregation
because the mixture of fine grains will be collected at the bottom of the pugmill. Results
mixing in the form of hot asphalt mixture from the pugmill immediately poured into
on a truckload truck.
The temperature of the hot aggregate inside the pugmill must be around 1750C.
This condition is needed to be able to obtain the temperature of the asphalt mixture
hot (hotmix) ± 1500C, maximum 1650C.
Hot aggregate temperatures should not be too high to prevent asphalt
sprayed onto burning aggregate. For making hot asphalt mixtures
in general, additional fillers or fillers are also needed. Filler material
this is not heated (outside air temperature).
Fillers or fillers
Fillers or fillers are poured into a mixer or pugmill through 2
way, that is through weighing together hot aggregates inside the weigh bin
or weighed alone and immediately poured into mixing or
Filler pouring can be mechanical, which is flowed using a kind of screw or
auger, or pneumatically, which is pumped.
What must be considered in this filler is the amount of filler that is poured for each
stirring or batch times. Too much filler or more than what is needed will
causing the hot asphalt mixture to be stiff, brittle and easily cracked.
Whereas if there is less the opposite.
The asphalt needed for mixing is stored in a container, you can
shaped like a cubical or cylindrical shape.
Asphalt stored in a heated asphalt container to obtain
sufficient dilution level for ease of spraying and shape
sprayed asphalt granules.
The maximum asphalt temperature in heating is 170
0C for polymer asphalt or
modified asphalt, 1600C for pen 60 hard asphalt so that the asphalt temperature is hot
sprayed onto the hot aggregate in the pugmill can still reach around
1450C – 150
0C depends on the type of asphalt.
In general, to prevent a decrease in the temperature of the asphalt pipes
distributor to the sprayer wrapped in heat retardant.
The asphalt cover in the container can be carried out in 2 ways, namely:
A- Direct heating, ie heat from a heating fire or burner is flowed to
in a pipe that coils in a reservoir where the asphalt
stored, so that the asphalt is in direct contact with the pipes
the hot one
B- Indirect heating, namely heating that occurs due to the asphalt
in contact with the walls of the heat pipe which is fed with hot oil
which has been preheated in its own oil heating place.
Hot asphalt is sprayed onto hot aggregate at a temperature of 1450C
1500C by using a high pressure asphalt pump to get it
form good asphalt spray.
In the asphalt spraying a number of asphalt weighing apparatus is installed
sprayed for each batch and temperature gauge
This dust collector is a component that must always be present
to maintain the cleanliness of the air and environment from fine dust
generated during the AMP process.
There are 2 types of dust collector, namely:
a) Dry type or dry cyclone, where the dust from cylinder exhaust
the dryer or dryer is sucked into the silo cyclone and rotated so that the particles
the weight will go down while the air is not
containing more dust particles will be released through the chimney. The particle
the weight is often used as a filler too.
b) Type of wet or wet scruber, where in this type of dust is carried away
exhaust air from the dryer is flowed into a tub or room and
sprayed with water, so the dust particles will be brought down by water and
accommodated in reservoirs. The air that comes out is clear of
dust and out through the chimney.
To run all AMP sources or components
the main power is a generator set or gene set. In general, this generator
rotated by a diesel engine.
All electrical connections must be closed to prevent current
short and for environmental security
Control room controller or control room
All operations of the asphalt mixing equipment (AMP) unit are controlled
from this control room or control room.
There are 3 known ways to control operations; namely manual method, semi method
automatic and automatic way
In controlling the operation of the manual method, setting / operating components
or parts of hot asphalt mixing equipment (AMP) are carried out with
set switches or buttons using hands. That is the supply arrangement
aggregate, asphalt, combustion in the burner, weighing, mixing and
removal of mixture from mixer or pugmill.
Control is semi automatic, some opening and setting
weighing is still manually controlled, including the opening of the discharge door
Automatic control of operations, all operations are set
automatic with a computerized system, including controls if there are errors
errors or incompatibilities and inoperability of one or several
activities / operations section, for example low heat aggregate temperature then
controlled on the burner, for example increased heating.
In controlling the operation automatically the tools must be more carefully observed
measurement and circuit relationships of hot asphalt mixing equipment
(AMP) to the control room, because the quantities that have been programmed can
just be at fault due to a disrupted circuit, so the final product is likely
is outside the specifications that have been designed or formulated before.
Equipment of continuous type hot asphalt mixing unit (continuous type)
On a continuous type both the drum mix type and the pugmill mix process
mixing hot aggregates with hot asphalt occurs continuously.
In the type of drum mix the hot asphalt is sprayed onto the hot aggregate inside the tool
dryer at the near end before discharge. While the aggregate heater
(burner) is placed at the end of the cold aggregate inclusion.
In the pugmill type mix mixing hot aggregate with asphalt occurs inside
pugmill, where hot aggregate stirring occurs from several fractions
or only one fraction with hot asphalt sprayed onto the mixture
the aggregate continuously too.
in general the main components that are important in mixing equipment
this type of hot asphalt (AMP) is the same as in batch type AMP, the difference lies
in the process of mixing hot aggregate with hot asphalt, even though it occurs at
in the pugmill but the process occurs continuously (in batch type occurs per
batch), hot aggregate flow for each fraction occurs continuously.
The amount of each heat aggregate per hour is arranged according to the size
expenditure door openings contained in the hot bin.
So in this type of continuous AMP there is no weighing bin or weigh bin