Cold riveting technology 50T hot aggregate bin asphalt mixing plant
with Toledo sensor
1.1 Hot aggregate powder bins
With total capacity of about 50T, the 5 hot aggregate powder bins
are heat preservation with 50mm rock cotton, the outside wall is
covered with stripe color steel plate, reducing temperature is
difficult for hot aggregate powder in the short time(reduce less
than 20℃ in 12 hours ). Every bin has the continued hopper feeder,
to detect the full positioning condition in the real-time; baffle
plates are set on clapboard of hot aggregate bin against wear; each
bin has the inspection hole separately and overflow pipeline.
2.1 Metering Part
All of hot aggregate, mineral powder and asphalt adopt pull type
sensor for weighing.
* Metering capacity of aggregate powder: 2000 kg
* Metering capacity of fine material: 300kg
* Metering capacity of asphalt: 200 kg
2.2 Hot aggregate weighing
Discharging door of hot aggregate bin adopt anti-jam structure and
is easy to open. Upon weighing, the door will close the big door
first, smaller door second. Upon auto weighing, computer will
calculate for 3 times against allow error to achieve required
accuracy. Meanwhile, compulsive manual feeding is also available,
when overloaded, computer will send alarm.
Aggregate hopper adopt double-opening-door type for fast
discharging and reducing impact against mixing tank, which will
reduce mixing cycle.
2.3 Filler weighing
Filler will be sent directly to pyramid type weighing hopper
through screw conveyor (Italia WAM) upon weighing, which is
succinct and smooth. At the outlet of screw conveyor, there is
pneumatic butterfly valve (Italia WAM) which controls the filler
impulse effectively to ensure weighing accuracy.
Pneumatic butterfly valve (Italia WAM) is installed at outlet of
filler weighing hopper, ensuring no ash leakage from weighing
hopper. Weighed filler is then distributed evenly to mixing tank
through spraying screw conveyor (Italia WAM) that crossing the
whole mixing tank.
* Power of spraying screw conveyor: 4kw
2.4.3 Asphalt weighing
Asphalt weighing adopts twice weighing (subtraction) method. When asphalt comes into weighing hopper, system will
calculate automatically by increasing 10% according to
bitumen-aggregate ratio, based on the actual weighing of aggregate
and filler, the computer will track and carry out accurate ratio
control to ensure exactness of bitumen-aggregate ratio. Also, the
computer has functions of one-time weighing and twice weighing (addition) for customer to choose.
There is float level switch in asphalt weighing tank to prevent
asphalt overflow; the computer also has asphalt overload alarm
function, when overloaded or overflowed, asphalt feeding pump will
stop automatically and alarm will be given.
Asphalt weighing tank has rock-wool to preserve heat in which the
asphalt is heated by heat transfer oil; weighed asphalt is pumped
and evenly distributed into mixing tank through one pipe that
crossing the whole mixing tank.
* Capacity of asphalt pump: 25.7m³ /h
* Drive power: 7.5kw
QLB Series Asphalt hot mix plant specification table
|Capacity of production||48tph||96tph||120tph||160tph||200tph||240tph|
|Cold bin volume||8m3||9m3||10m||10m3||12 m3||12m3|
|Dust removing type||Gravity drop type and bag filter(air back fluch)|
|Volume/number of hot bin||12t/4||32t/4 or 5||40t/4 or 5||50t/5||60t/5||80t/5|
|Precision of aggregate weighing||Less than ±0.1%||Less than ±0.1%|
|Precision of powder weighing||Less than ±0.16%||Less than ±0.16%|
|Precision of asphalt weighing||Less than ±0.18%|
|Mixer ability KG/batch||600||1200||1500||2000||2500||3000|
|Volume/number of asphalt tank||10m3/2||16m3/2||30m3/2||30 m3/3||50 m3/2||50 m3/3|
|Volume of finished product bin(T)||-||60||100||120||160|