Asphalt vibrating screen is a kind of screening equipment that uses vibration motor as the main vibration source. In the process of use, the material moves forward in a straight line while being thrown up on the screen. At this time, the material enters into the feed port of the sieve of the mixing station evenly from the feeding port, and through the action of the multi-layer screen, the material on the sieve and the material under the sieve are discharged from their respective outlets.

Ssphalt Vibrating Screen Features

Aggregate Screening: In asphalt production, various aggregates such as sand, gravel, crushed stone, and recycled materials are mixed with bitumen (asphalt binder) to produce hot mix asphalt (HMA). The asphalt vibrating screen is used to screen these aggregates to ensure they meet the desired size specifications.

Multiple Decks: Asphalt vibrating screens typically consist of multiple screen decks arranged in a cascading configuration. Each deck contains a mesh or perforated plate with specific opening sizes to separate aggregates into different fractions (e.g., fine, intermediate, coarse).

Vibration Mechanism: The vibration mechanism of an asphalt vibrating screen involves an eccentric shaft with unbalanced weights or rotary vibrating motors mounted at both ends. When the motor rotates, it generates vibratory motion in the screen box, causing the aggregates to move along the screen surface and stratify according to size.

Efficient Screening: The asphalt vibrating screen efficiently separates aggregates into different size fractions while ensuring minimal oversize or undersize material. This is crucial for achieving the desired gradation and quality of the asphalt mix, which directly impacts the performance and durability of the paved surfaces.

Durable Construction: Asphalt vibrating screens are designed to withstand the harsh operating conditions encountered in asphalt production plants, including high temperatures, abrasive materials, and continuous operation. They are typically constructed using heavy-duty materials such as steel or specialized alloys to ensure durability and longevity.

Adjustability: Operators can adjust various parameters of the asphalt vibrating screen, such as the amplitude and frequency of vibration, to optimize screening performance for different types of aggregates and asphalt mix designs.

Integrated Design: Asphalt vibrating screens are often integrated into the overall layout of asphalt production plants, allowing for seamless operation and efficient material handling. They are positioned upstream of the mixing drum or batch plant to ensure proper screening before the aggregates are mixed with bitumen.

Quality Control: The asphalt vibrating screen plays a crucial role in quality control by ensuring that only properly sized aggregates are used in the asphalt mix. This helps to meet regulatory requirements and specifications for asphalt pavement construction.

How They Typically Operate

Screening Asphalt Mixtures: Asphalt vibrating screens are used to separate aggregates, filler materials, and other components used in asphalt mixtures. These mixtures typically consist of various sizes of crushed stone, sand, and asphalt binder.

Screen Deck: Asphalt vibrating screens usually feature multiple screen decks, each containing wire mesh or perforated plates with different opening sizes. The screen decks are arranged in layers to facilitate the separation of different particle sizes and ensure proper mixing of the asphalt components.

Vibration Mechanism: The vibration mechanism of an asphalt vibrating screen typically involves eccentric weights or unbalanced flywheels mounted on a shaft. When the motor rotates the shaft, it generates vibration in the screen deck, causing the asphalt mixture to move across the screen surface.

Material Separation: As the asphalt mixture is fed onto the vibrating screen, the particles are separated based on size. Fine particles and filler materials pass through the screen openings, while oversized aggregates are retained on the screen surface and discharged at the end of the screening process.

Efficient Mixing: Asphalt vibrating screens play a crucial role in ensuring proper mixing of the asphalt components. By separating and screening the aggregates and filler materials, these screens help to achieve the desired gradation and consistency in the asphalt mixture, resulting in high-quality pavement surfaces.

Adjustability: Operators can adjust various parameters of the asphalt vibrating screen, such as the amplitude and frequency of vibration, to optimize the screening performance for different types of aggregates and asphalt mixtures.

Durability: Asphalt vibrating screens are designed to withstand the harsh operating conditions commonly found in asphalt plants, including exposure to high temperatures, abrasive materials, and heavy loads. They are constructed using durable materials and equipped with robust components to ensure reliable operation and long service life.

Maintenance: Proper maintenance of asphalt vibrating screens is essential to ensure optimal performance and prevent downtime. Regular inspection, cleaning, and lubrication of the screen components are necessary to keep the screens operating efficiently and prolong their lifespan.

Ssphalt Vibrating Screen Application

Asphalt vibrating screens are widely used in fertilizers, raw materials, abrasives, abrasive raw materials, building materials, plastics, metallurgy, etc.

Aggregate Screening: Asphalt vibrating screens are used to screen and separate aggregates used in asphalt production. These aggregates typically include various sizes of crushed stone, sand, and gravel. The vibrating screen removes oversized particles and ensures that only properly sized aggregates are used in the asphalt mix.

Mixing Plant: Asphalt vibrating screens are integral components of asphalt mixing plants or asphalt plants. These screens are positioned at various stages of the production process, such as the cold feed bins, hot bins, or aggregate storage bins, to screen and classify aggregates before they are fed into the mixing process.

Particle Size Classification: Asphalt vibrating screens help classify aggregate materials based on their particle size distribution. Proper classification ensures that the asphalt mixture meets the specified grading requirements for different types of asphalt pavements. The screens separate the aggregates into different size fractions, including coarse aggregates, fine aggregates, and filler materials.

Quality Control: Vibrating screens play a crucial role in quality control during asphalt production. They help ensure that the asphalt mixture contains the correct proportions of aggregates with the desired particle size distribution. Proper screening helps optimize the asphalt mix design and ensures the final product meets the required specifications for performance and durability.

Prevention of Aggregate Segregation: Asphalt vibrating screens help prevent segregation of aggregate materials during the mixing process. Segregation occurs when different sizes of aggregates separate and settle unevenly within the asphalt mixture, leading to inconsistent pavement quality. Proper screening ensures uniform distribution of aggregates, minimizing the risk of segregation.

Efficient Production: By accurately screening and classifying aggregates, asphalt vibrating screens contribute to the efficient production of asphalt mixtures. They help optimize the use of raw materials, reduce waste, and improve the overall productivity of asphalt plants. Efficient screening also reduces downtime and maintenance costs associated with equipment failures.

Environmental Considerations: Asphalt vibrating screens may incorporate features to minimize dust emissions and environmental impact during asphalt production. Dust suppression systems and enclosed screening areas help control airborne dust particles, ensuring compliance with environmental regulations and improving the working conditions for plant operators.