High Frequency Screens

Overview

Astec high frequency screens utilize high-speed vibration, from 3600 - 4200 RPM, directly induced to the screen media, allowing for increased stratification and material separation.

The directly-induced vibration improves screen efficiency at high production rates compared to conventional screens. A unique rotary tensioning system provides the quickest screen media changes in the market, up to 50 percent faster than competitive models. Our high frequency screens offer ideal gradation control for reclaiming fines in both wet and dry applications.

Applications

  • Aggregates

    There are two main classes of aggregates: natural and manufactured. Deleterious material needs to be removed from both classes. Processing these materials typically requires various steps including reduction and sizing and also may include dewatering and sorting. Producers can use a variety of crushing, screening, dewatering and conveying equipment to meet their desired specifications.
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    • Concrete Recycling

      Concrete is one of the most recycled materials in the world and can be repurposed several times over. Once the existing concrete is demolished or torn up, it needs to be processed for accurate shaping and sizing using a crusher and screen. 
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      • Construction

        Construction projects today depend on an available supply of quality concrete mix. With the most comprehensive line of concrete production equipment in the industry, Astec is ready to help meet that demand.
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      • Construction Aggregates

        Construction aggregate is typically medium or coarse materials like granite, limestone or trap rock, sand, gravel, slag or recycled concrete. Processing this material may include reducing its size with a crusher, sizing the crushed material with a screen and conveying the material into different stockpiles.
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        • Construction & Demolition Recycling

          Construction and demolition recycling (C&D) is mixed material associated with construction and demolition. The material could include wood, cardboard, gypsum, plastic, metal, wire, roofing shingles, asphalt, concrete and more. By separating and recycling different materials it reduces landfill waste and associated costs, while also producing value-added products.
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        • Crushed Stone

          Crushed stone is a versatile product that can be used in a wide range of applications from construction to road building and even agriculture. Processing this material may include reducing its size with a crusher, sizing the crushed material with a screen and conveying the material into different stockpiles. 
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          • Recycled Asphalt Pavement

            Recycled asphalt pavement (RAP) is asphalt paving material recovered from old road beds either by milling or excavation.
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          • Sand & Gravel

            Aggregates, when gathered, may contain clays, silts and other deleterious material that needs to be processed out for commercial-grade products.
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            Key Specifications

            All specifications subject to change without notice.

            Features

            • High Frequency Screen Applications

              • Crushed stone, sand and gravel
              • Recycled asphalt
              • Coal
              • Fly ash
              • Slag
              • Coke

            • High Frequency Screen Operation

              • ½” -30M material separations 
              • 38°- 43° operating angle
              • Maximum stroke  of .094”/ 2.38mm
              • Speed range from 3,600 - 4,200 RPM

            • Rotary Tensioning System

              • Provides quick screen media changes 
              • Easy replacement of each section  
              • Less downtime, increased operation time 

            • Electric/Hydraulic Vibrators

              • All decks driven by variable-speed hydraulic vibrators 
              • Optimal screen efficiency and production 
              • Electric vibrators (3,600 RPM) available upon request 

            • Directly-Induced Vibration

              • High-speed vibration (3,600 – 4,200 RPM) 
              • Applied directly to screen media for increased stratification and separation 
              • Improve screening efficiency compared to conventional screens 
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