In Brazil’s rapidly expanding infrastructure and mining sectors, river pebble crushing and screening plants are essential for producing high-quality aggregates and manufactured sand. Given the high hardness and abrasiveness of river pebbles, a multi-stage process is required to ensure equipment longevity and product quality.
1. Technical Crushing Process for River Pebbles
River pebble processing typically follows a three-stage crushing workflow to optimize efficiency and reduce wear on parts.
- Primary Crushing (Jaw Crusher): Large river stones (up to 500mm or more) are fed via a vibrating feeder into a Jaw Crusher for initial reduction. This stage focuses on handling large feed sizes and providing a coarse output of approximately 65-180mm.
- Secondary Crushing (Cone Crusher): Because river pebbles are extremely hard, a Cone Crusher is the preferred secondary unit over impact crushers. It uses compressive force to refine the material into smaller, uniform fragments, typically 16-40mm.
- Tertiary Crushing & Shaping (VSI Sand Maker): For projects requiring high-quality sand or cubical aggregates, a Vertical Shaft Impact (VSI) crusher is used. It employs a “rock-on-rock” principle to shape the final product to meet strict engineering specifications.
2. Screening and Classification
After crushing, the material is classified through a Vibrating Screen system.
- Multi-layer Separation: Screens separate the material into different size fractions (e.g., 0-5mm, 5-10mm, 10-20mm) demanded by the Brazilian construction market.
- Closed-loop Feedback: Oversized material that does not meet the specified size is returned via belt conveyors to the crusher for reprocessing.
3. Market Trends in Brazil
The Brazilian crusher market is projected to reach approximately USD 295 million by 2035, driven by urban infrastructure and mining expansion.
- Mobile Solutions: There is a growing preference for Wheel-mounted and Track-mounted Mobile Crushers which allow for rapid deployment across different project sites in regions like Mato Grosso or Minas Gerais.
- Mining 4.0 Integration: Modern plants in Brazil are increasingly adopting smart screens with sensors that collect real-time data on feed rates and wear.
- Major Players: Leading suppliers in the region include Sandvik, and local manufacturers like AGF Equipamentos and Mineração SM.
Would you like a detailed equipment list and cost estimate for a specific production capacity (e.g., 100 TPH or 200 TPH) in Brazil?