A Mobile Crushing and Screening Plant is a portable industrial system designed to crush rocks, minerals, or construction waste into specific-sized aggregates and classify them through screening. Its mobility allows rapid deployment and operational flexibility across construction sites or mining areas.

Components and Mechanism:

  1. Primary Crusher (Jaw/Impact Crusher):

    • Reduces large rocks (1m diameter) to 100-300 mm chunks.

    • Jaw crushers handle hard materials; impact crushers suit softer rocks.

  2. Secondary/Tertiary Crushers (Cone/Impact):

    • Further crushes material to 20-50 mm. Tertiary crushers (VSI) produce sand-sized particles.

  3. Vibrating Screens:

    • Classify crushed materials into fractions (e.g., 0-5 mm, 5-12 mm).

    • Multi-deck screens enable simultaneous sorting of multiple sizes.

  4. Feeder (Vibrating/APRON):

    • Ensures uniform material flow into the crusher.

  5. Conveyor Belts:

    • Transport materials between crushers, screens, and stockpiles.

  6. Mobile Chassis (Tracked/Wheeled):

    • The entire system is mounted on a chassis with hydraulic legs or towable trailers.

How It Works:

  1. Loading:

    • Material is fed into the plant via excavator or loader.

  2. Primary Crushing:

    • Large rocks are reduced to coarse aggregates (100-300 mm).

  3. Pre-Screening (Optional):

    • Some systems screen material post-primary crushing to bypass fine particles.

  4. Secondary/Tertiary Crushing:

    • Cone crushers refine the material to 25-50 mm for roadbase.

  5. Screening Stage:

    • Vibrating screens sort aggregates to meet standards (e.g., ASTM/EN). Oversized material is recirculated.

  6. Stockpiling:

    • Final products are conveyed to separate stockpiles.

Advantages:

  • Mobility: Relocate and set up within a day.

  • Closed-Circuit Operation: Automatically recirculates oversized material.

  • Energy Efficiency: Operates via diesel generator or external power.

  • Versatility: Produces sand, gravel, or recycled concrete.

Applications:

  • Aggregate Production: Materials for concrete, asphalt, and road construction.

  • Mining: Crushing ores in gold, copper, or coal mines.

  • Waste Recycling: Reusing concrete, bricks, or asphalt from demolition.

  • Special Projects: Railway ballast, dam construction.