A Mining and Aggregate Crushing-Screening Plant is an industrial facility designed to process natural stones (limestone, granite, basalt) or recycled materials (construction waste) into aggregates (sand, gravel, crushed stone) for construction purposes. These plants combine crushing (size reduction) and screening (classification) processes to produce ready-to-use materials.

Working Principle:

  1. Feeding (Material Loading):

    • Large rocks from quarries or recycled materials are loaded into a feeder using excavators or loaders.

  2. Primary Crushing:

    • A jaw crusher or primary impact crusher reduces material size to 100-300 mm.

  3. Pre-Screening:

    • A vibrating screen separates the crushed material. Sized aggregates are stockpiled, while oversized pieces proceed to secondary crushing.

  4. Secondary Crushing:

    • A cone crusher or secondary impact crusher further reduces material to 20-100 mm.

  5. Tertiary Crushing:

    • A vertical shaft impactor (VSI) produces fine, cubical aggregates (0-32 mm).

  6. Final Screening and Classification:

    • Multi-deck screens classify materials into sand, gravel, or crushed stone.

  7. Stockpiling and Transport:

    • Conveyors transfer aggregates to storage areas, and trucks deliver them to construction sites.

What is Aggregate?
Aggregate refers to natural or artificial granular materials used in concrete, asphalt, road bases, or drainage systems. They are categorized by size:

  • Fine Aggregate (Sand): 0-4 mm

  • Medium Aggregate (Gravel): 4-32 mm

  • Coarse Aggregate (Crushed Stone): 32-64 mm

Aggregates enhance the mechanical strength of construction materials and ensure cost-effective production.