Asphalt Drum Mix Plant

The hoppers have been properly designed with slopes, allowing a constant discharge without bridge forming. The first bin meant for the small size aggregate or dust is fitted with vibratory motor to ensure the free flow. Each hopper is equipped with an adjustable opening door that determines the discharge quantity for the materials capacity in outlet, as a function of specific weight of materials.

The material is drawn out from the hoppers by means of extracting conveyor driven by a preset-able adjustable variable drive motor, coupled with worm gear boxes, that enables to increase or decrease the material output as per the job mix formula requirements. It is also possible to increase or decrease the total capacity without varying the preset settings by means of master control.

The vibratory screen is assembled at the end of cold aggregate feeder for removal of oversized materials.

The Dryer unit is long rotating cylindrical drum. It is mounted on sturdy and robust steel structure. The whole structure is having adjustable height legs to give proper degree to the unit for accurate results.

The electronic two-stage high-pressure jet burner is mounted on the chassis on the input side.

The rotation of Drum is through heavy-duty gearbox, coupled with motor through suitable coupling. The Drum is also supported by 4 Nos. of Trunnions rollers running on heavy-duty bearings.

This drum is divided into two zones viz.

• HEATING + DRYING ZONE
• MIXING ZONE

The thermo-drum is completely insulated with ceramic glass wool and covered with Stainless Steel sheet to prevent the heat losses and to save fuel as well as the life of the drum.

Thermo -drum Burner is the heart of the entire system hence its efficiency, ease of serviceability etc. are most important factors

Features :

• Two stage High & low
• Capacity to reduce the moisture up to 0.5% and achieve 180 Deg Celsius for aggregate
• Able to use LDO/ FO/ diesel as fuel
• Nozzle cleaning is possible during running condition
• Remote controlled & fully automatic operation

Fully insulated double walled tank is equipped with separate high-pressure electronic burner for heating the Asphalt and control unit capable of metering and spraying required quantity of bitumen at specified temperature.
The positive displacement jacketed Asphalt pump coupled with reduction gearbox and variable speed motor is provided with hot oil circulating system.
All the Asphalt carrying pipelines are hot oil jacketed and thoroughly insulated with asbestos tape.

Features :

• External insulation with ceramic wool and covered with suitable thick sheet
• Tested tube nest for diathermic oil circulation
• Thermic duct, Manhole, lifting hooks, Breather pipe
• Electronic High-pressure Jet burner
• Heavy duty jacketed Asphalt pump
• Thermometers

Fully Automatic Computerized Control Panel With Latest Microprocessor Technology With Printer For Operation Of The Plant.

Fully Automatic Computerised Control Panel With Insulated Control Cabin Fitted With Air Conditioner And Micro Controller Based Control Panel With Printer And Computer Affording Total Control For Operation Of The Plant From The Keyboard With The Relevant Software.

Features :

• The plant is supplied with centralized Control Panel
• All controls, including the motor control center circuit breakers, are provided in the control panel
• The control Panel comprises of the Automatic Burner Controls, Aggregate and Asphalt Blending Controls, Motor Controls, Feeder Bin Controls and Electric Switchgear
• All the parameters like, temperature of bitumen-hot mix material-exhaust gases and aggregate weight, asphalt percentage, hot mix material weight etc. are displayed on the control panel
• It is equipped with protections like Single Phasing, Overload, fuses, Sequence Interlock etc.
• Load wise data can be printed on the printer provided in the panel
• The body of the panel is fabricated from CRC sheet and is duly powder coated

The piping is provided up to-coating zone in the thermo-drum.

The system is powered by a variable speed Motor coupled with gearbox to rotary valve and also synchronized with aggregates and bitumen.

The feeding of filler (lime/cement) is pneumatic by means of air blower.

Mixed hot material taken out from mixer drum is carried by inclined hot conveyor belt & discharged into the Tipper/Truck through automatic Hydraulic surge storage hopper.

The surge storage hopper of approximately 350 to 1000 kgs is provided at the discharge end of the conveyor.

The surge storage hopper is hydraulically actuated, for opening and closing hopper door and scrapper plate to scrape out the mixed material sticking to the conveyor.