High-Hardness Stone Crushing and Screening Plant 

A high-hardness stone crushing and screening plant is designed to process tough, abrasive rocks such as granite, basalt, quartz, and other hard minerals. These plants are critical in mining, construction, and infrastructure projects to produce aggregates of specific sizes.

Key Components

  1. Primary Crusher:

    • Uses jaw crushers or gyratory crushers to break down large rocks into coarse fragments (150–300 mm).

  2. Secondary Crusher:

    • Cone crushers or impact crushers further reduce material to medium-sized pieces (20–70 mm).

  3. Tertiary Crusher:

    • Vertical shaft impactors (VSI) or fine cone crushers refine particles to the desired size (≤40 mm) and improve shape.

  4. Vibrating Screens:

    • Separate crushed material into different grades (e.g., 0–5 mm, 5–15 mm, 15–25 mm). Oversized material is recirculated.

  5. Conveyor Belts:

    • Transport material between crushers, screens, and storage.

  6. Dust Suppression Systems:

    • Mitigate airborne particles using water sprays or bag filters.

  7. Automation & Control Systems:

    • Monitor and optimize production via PLCs and sensors.

Process Flow

  1. Feeding: Raw stone is loaded into the primary crusher.

  2. Crushing: Multi-stage crushing reduces size incrementally.

  3. Screening: Material is sorted; undersized aggregates are stored, while oversized pieces return for re-crushing.

  4. Stockpiling: Final products are categorized and stored for transport.

Applications

  • Road base, concrete aggregates, railway ballast, and architectural stone.