An asphalt mixing plant is utilized to combine several aggregates with bitumen to create hot mix paving material for various construction industries. The aggregates used can differ based on the grade and size of asphalt required. Finer aggregates can also be added together with mineral fillers. There are two main varieties of asphalt mixing plants: continuous mix plants and batch mix plants. Both forms of plants produce asphalt their difference is located in the process 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 in the drying drum through a conveyor system.
3. The burner fueling the drying drum ensures the aggregates are dried effectively with heat.
4. The plant is fitted having a primary dust collector. That collector is designed for filtering heavy dust particles, so there may be less pollution.
5. As soon as the aggregates(aimix group co. ltd) are dry, these are moved to the tower unit through a bucket elevator.
6. At the top of the tower unit is a multi-layered screening unit. As hot aggregates pass through the multiple screens, they get treated with the screening effect.
7. Separate hot bins are widely used to store different form of aggregates.
8. Bitumen is stored and heated in special tanks that are equipped with pumping equipment. The bitumen is pumped 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 that required time, the hot asphalt is ready to be used. It really is typically discharged into waiting tucks, but it is also shipped to temporary storage silos.
11. The entire plant is controlled via a computerized user interface.
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Components Of An Asphalt Plant
1. Primary vibrating screen
2. Cold feed bins
3. Charging conveyor
4. Hot aggregate bucket elevator: The bucket elevator includes an extended, covered structure with many different buckets connected to a chain system. The heated aggregates are transported to the top of the tower in this particular elevator unit.
5. Drying drum with burner: Perhaps the most significant area of the plant. It is actually compromised of your rotating drum and burner unit. The rotation ensures the aggregates are heated up evenly.
6. Pre-separator with bag filter: The bag filter is utilized to get rid of harmful dust particles and toxic gases from the plant's emissions.
7. Hot bins
8. Multi-deck vibrating screens
9. Mixing unit: The mixing unit ensures every one of the raw materials are combined effectively for that correct duration. Mixers are generally jacketed so that the contents remains hot and ready for discharge.
10. Weighing hoppers: The weighing hoppers(tolvas de pesaje) are crucial for ensuring the appropriate proportions of raw materials are shipped 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 convenient oversite and charge of the plant.
13. Filler storage silo/hopper
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