An asphalt mixing plant can be used to mix several aggregates with bitumen to make hot mix paving material for a variety of construction industries. The aggregates used can differ dependant upon the grade and scale of asphalt required. Finer aggregates can be added as well as mineral fillers. The two main main kinds of asphalt mixing plants: continuous mix plants and batch mix plants. Both types of plants produce asphalt their difference is located in the approach used to produce said asphalt.
Working Principles Of Asphalt Batch Mixing Plant
1. Raw, unheated aggregates from different storage bins are fed into the cold aggregate feeder.
2. The aggregates are moved into the drying drum(continuar) using a conveyor system.
3. The burner fueling the drying drum ensures the aggregates are dried effectively with heat.
4. The plant is fitted using a primary dust collector. That collector is made for filtering heavy dust particles, so there may be less pollution.
5. After the aggregates are dry, they may be moved to the tower unit through a bucket elevator.
6. On top of the tower unit is a multi-layered screening unit. As hot aggregates go through the multiple screens, they get treated with the screening effect.
7. Separate hot bins are utilized to store different form of aggregates.
8. Bitumen is stored and heated in special tanks that have pumping equipment. The bitumen is pumped in to the weighing hopper.
9. The aggregates are weighted and discharged in the main mixing unit. Inside of the mixer, filler materials and bitumen are together with the aggregates.
10. After mixing for your required time, the hot asphalt is able to be employed. It is actually typically discharged into waiting tucks, but it could also be sent to temporary storage silos.
11. The complete plant is controlled using a computerized user interface.
Parts Of An Asphalt Plant
1. Primary vibrating screen
2. Cold feed bins
3. Charging conveyor
4. Hot aggregate bucket elevator: The bucket elevator includes a long, covered structure with a lot of buckets connected to a chain system. The heated aggregates are transported to the top level in the tower with this elevator unit.
5. Drying drum with burner: Perhaps the most crucial portion of the plant. It can be compromised of the rotating drum and burner unit. The rotation ensures the aggregates are heated up evenly.
6. Pre-separator with bag filter: The bag filter is used to eliminate harmful dust particles and toxic gases from your plant's emissions.
7. Hot bins
8. Multi-deck vibrating screens
9. Mixing unit: The mixing unit ensures all of the raw materials are combined effectively to the correct duration. Mixers are generally jacketed to ensure the contents remains hot and prepared for discharge.
10. Weighing hoppers: The weighing hoppers are crucial for ensuring the appropriate proportions of raw materials are delivered to the mixing drum.
11. Bitumen storage tanks: Direct heating type tanks are equipped with a burner. Meanwhile, indirect heating type tanks utilize an internal hot oil coil system for heating the bitumen.
12. Control Panel: PLC panel using a touchscreen display and interface for quick oversite and control of the plant.
13. Filler storage silo/hopper
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