An aggregate washing and screening plant is an industrial facility designed to clean, classify, and prepare natural or recycled aggregates (sand, gravel, crushed stone) for use in construction projects. It removes unwanted components like clay, dust, and organic materials while ensuring uniform sizing.
Function:

  • Enhances aggregate quality by eliminating impurities.

  • Sorts materials into specific size ranges (e.g., 0-4 mm, 4-12 mm, 12-25 mm).

  • Ensures compliance with construction standards.

  • Recycles water to promote environmental sustainability.
    How It Works:

  1. Feeding: Raw aggregate is loaded into the plant via an excavator or conveyor.

  2. Pre-Screening: Vibrating screens remove oversized debris (rocks, roots).

  3. Washing:

    • Log Washer: Abrasive rotating paddles scrub off clay and sticky substances.

    • Screw Washer: Uses water and a rotating screw to wash materials.

    • Hydrocyclone: Separates fine particles (silt, dust) via centrifugal force.

  4. Final Screening: Cleaned aggregate is sorted into final sizes using vibrating screens.

  5. Water Recycling: Wastewater is treated in settling ponds or filtration systems for reuse.
    Applications:

  • Concrete and asphalt production (requires clean, graded aggregates).

  • Road construction (ensures stability of base materials).

  • Mining (used in ore beneficiation processes).

  • Recycling plants (processing construction and demolition waste).

  • Landscaping and drainage projects (washed gravel applications).