A Granite Crushing and Screening Plant is an industrial facility designed to process granite, an igneous rock, into various sizes for construction, decorative, and infrastructure projects. Granite’s durability, abrasion resistance, and aesthetic appeal make it ideal for high-demand applications. These plants produce aggregates, sand, gravel, and decorative stones.

Operational Process

  1. Raw Material Extraction and Feeding:

    • Granite blocks are extracted via blasting or wedging in quarries.

    • Blocks (1-2 meters) are transported to the feed hopper using excavators.

    • Grizzly Screen: Filters oversized rocks for primary crushing.

  2. Crushing Stages:

    • Primary Crushing:

      • Jaw Crusher: Reduces granite to 100-300 mm through compression.

      • Impact Crusher: Uses high-speed impacts for initial fragmentation.

    • Secondary Crushing:

      • Cone Crusher: Achieves 20-50 mm particles via interparticle crushing.

      • Horizontal Shaft Impactor (HSI): Further reduces material size.

    • Tertiary Crushing (Optional):

      • Vertical Shaft Impactor (VSI): Produces fine aggregates (3-15 mm).

  3. Screening and Washing:

    • Vibrating Screens: Sort crushed granite into sizes (e.g., 0-5 mm sand, 10-30 mm gravel).

    • Sand Washers: Remove dust and impurities from fine aggregates.

  4. Material Handling:

    • Belt Conveyors: Transport materials between crushers, screens, and stockpiles.

    • Storage Silos: Store categorized products (coarse aggregates, sand).

  5. Automation and Safety:

    • PLC systems monitor production efficiency and equipment health.

    • Dust suppression and emergency shutdown systems enhance safety.

Applications:

  • Construction and Infrastructure:

    • High-strength concrete aggregates.

    • Asphalt mixes for roads and pavements.

    • Railway ballast for track stability.