Introduction
The Asphalt Batch Plant is mainly composed of cold aggregate supply system, drum dryer, burner, dust collector, hot aggregate elevator, vibrating screen, hot storage bins, filler supply system, weighing and mixing system, asphalt storage, bitumen supply system etc.
The cold feed bins where the aggregates are temporarily stored before processing. Closely associated with collecting (feeder and gathering) conveyors under each bin and the incline or charging conveyor which carries the combined aggregates to the dryer. In dryer where moisture is removed from the aggregates and the aggregates are heated to the proper mixing temperature. The hot, dry aggregates are then carried to the top of the batch plant tower by means of a hot elevator. At the top of the plant, the material is passed through a set of screens which divide the aggregate into several different sizes, typically four. The heated aggregates are then temporarily stored in the plant hot bins, located directly under the screen deck. From these bins, the various sizes are proportioned, by weight, into the weigh hopper. At the same time that the aggregate & cement is being weighed separately in separate hopper, bitumen is pumped from a storage tank to the asphalt weigh bucket on the plant. The correct blend of material is next dropped into the plant mixer, a twin-shaft pugmill. After the aggregate is introduced into the pugmill. the bitumen sprayed into the mixing unit. All materials are blended together by the shearing action of the pugmill blades or paddles. The completed mixture is then discharged from the plant, either into a haul truck or into a conveying device to temporary storage in a surge silo for subsequent delivery to the paving site.
Reclaimed or Recycled unused mix material can be introduced into the plant at the following points:
(1) at the bottom of the hot elevator
(2) into the hot bins
(3) more commonly into the weigh hopper.
Due to environmental requirements, each batch plant is equipped with an air pollution control device. This equipment can consist of a dry collector, a wet collector, a fabric filter (baghouse), or a combination of devices. In some cases, the fines collected in the pollution control equipment are wasted in other cases the dust is returned to the plant for incorporation into the mixture. Sometimes the dust is reintroduced into the bottom of the hot elevator. More often it is fed into the aggregate weigh hopper as mineral filler.
All these components have characteristics that impact not only the overall quality of the asphalt but also the effect on the environment.
The Asphalt Batch Plant is almost completely automated. After mix proportions and timers are set and the plant is started, the plant repeats the weighing and mixing cycles until stopped by the operator or until a shortage of material or some unexpected malfunction causes the plant to shut down itself. The plant operation's manual provided by Moon Engineering provides details on the setup and adjustment of the automatic equipment. You must check the accuracy and adjustment of this equipment, particularly the aggregate scales, asphalt scales or meters, batching controls, and recording equipment (if used). This should result in trouble-free production; moreover, you should check the entire plant periodically to ensure the finished product meets specifications.
Components
The asphalt plants are renowned for their high efficiency and low maintenance [ .. ]
The inclined circular motion vibrating screens with patented vibrating screen [ .. ]
The Bins are all-welded and modular in construction, permitting east addition [ .. ]
The Plant supplied with a standard dual stage pollution control [ .. ]
Fully Computerized air-conditional control cabin, with on board [ .. ]
The plants supplied with hot oil jacketing on bitumen pipe line [ .. ]
With us, customers can opt for direct heating type [ .. ]
Product Specifications
PLANT MODEL
M-AB-120W
Plant Capacity @ 3 % Moisture Content
TPH
128
Batch Size
Kg
1600
Cycle Time
Sec
45
UNITS
Cold Feed Bins
No of Bins*/ Capacity
Nos/ mᵌ
4/29.2
Charging conveyor
Capacity
Tph
140
Thermo Drum
Dryer (L x D)
Mtrs
8x2.1
Drive Type
4 W Friction Drive
Burner
Type
High Pressure, Fully Automatic, Modulating
Fuel
Diesel/ Furnace Oil
Capacity
MW/ hr
14.1
Hot Elevator
Capacity
Tph
140
TOWER UNITS
Filler Elevator
Capacity
Tph
21
Screening Unit
Screening Method
Inclined Circular Vibration
Number of Deck
4
Screening Capacity
Tph
140
HOT AGGREGATE BIN UNITS
No. of bins
4
Weighing Unit
Aggregate Hopper Capacity
Kg
1600
Filler Hopper Capacity
Kg
300
Bitumen Hopper Capacity
Kg
225
Mixer Unit
Type
Twin shaft hot oil jacketed
Filler Hopper Capacity
Kg
300
Bitumen Hopper Capacity
Kg
225
POLLUTION CONTROL UNIT
Primary
Type
Centrifugal Double Cyclone
Secondary
Type
Bag House Filter
Bag House Filter
Reverse Air Flow*
Filter Area
m²
330
Control Panel
Type
Fully Computerized with manual over-ride
*Optional Available
Filler Silo
Capacity Range
Mᵌ
3 / 7 / 11
Bitumen Tanks
Capacity Range
Mᵌ
15 /25 / 30 / 50
Heating System
Direct heating/ Thermic oil heati