Asphalt Plant Weighing System
The asphalt plant weighing system ensures precise measurement of materials used in the asphalt plant, adding them to the mixer according to the specified recipe. This system directly affects the quality and durability of the asphalt produced.
The asphalt plant weighing system typically consists of the following components:
- Feeding Unit: The section where materials are stored and fed into the plant.
- Weighing Unit: The unit responsible for measuring the weight of the materials.
- Transfer Unit: The part where the measured materials are conveyed to the mixer.
Feeding Unit
The feeding unit stores and delivers materials into the asphalt plant. Aggregates are screened and sorted into different sizes by the sieve located in the tower group of the asphalt plant. These materials are classified into silos below the sieve based on size. A specially designed flap system transfers aggregates from these silos to the aggregate scale, where each material is weighed separately as it passes through dedicated gates. Once the required materials are measured, the discharge gates on the scale open, releasing the aggregates into the mixer.
Similarly, filler dust and other fine materials captured by the plant’s filter system are transported via elevators to designated areas and kept ready for use. The filler and dust components are fed into scales using star feeders, ensuring precise measurement. These weighed components are then discharged into the mixer using screws or flaps.
Bitumen Weighing
Bitumen from storage tanks is transferred through piping systems and pumps to the bitumen tank located at the weighing station. The required amount of bitumen is pumped into the bitumen scale, weighed, and discharged into the mixer using pumps. Bitumen scales are categorized into two classes: pumped discharge systems and gravity discharge systems. Additionally, based on the heating system, bitumen scales are available as electric-heated or hot oil-heated.
Weighing Unit
The weighing unit measures the weight of the materials using electronic load cells. This unit ensures materials are weighed according to the recipe specifications, maintaining the consistency and quality of the asphalt mix.
The asphalt plant weighing system can be operated manually or automatically. In manual systems, operators set the weights manually. In automatic systems, weights are managed by computer systems for precise and efficient control.
Functions of the Asphalt Plant Dosing System
- Accurate measurement of materials based on the recipe
- Consistent and smooth feeding of materials into the mixer
The asphalt plant dosing system is essential for improving the quality and efficiency of asphalt production.
Alfamix Asphalt Plant Dosing System Features
- The aggregate scale is produced in various sizes based on plant capacity, utilizing four load cells for precise weighing.
- The clap system that feeds the aggregate scale features two pneumatic-controlled gates per compartment: one large and one small, ensuring the right amount of material is collected for the recipe.
- The aggregate scale has two discharge gates, each driven by a piston for rapid unloading.
- The filler dosing system includes one filler scale weighed using three load cells.
- Beneath the filler scale is a pneumatic butterfly flap and a screw conveyor to transport filler to the mixer.
- A star feeder between the filler silo and the scale serves as an airlock, ensuring accurate filler measurement. An optional slide flap can be added above the airlock.
- The bitumen scale uses three load cells for accurate measurement.
- The bitumen discharge system features a pump, making the unloading process faster and more efficient.
- A float system with a magnetic switch and stainless steel body minimizes the risk of bitumen overflow.
Proper operation of the asphalt plant weighing system is crucial for maintaining the quality and durability of the asphalt. Regular maintenance and calibration of these systems are essential to ensure optimal performance.