A mobile primary crushing and screening plant is a portable unit used in quarries, construction sites, or recycling areas to crush large and hard materials such as rocks, stones, and concrete in the initial phase, and then classify them by size through a screening system. The term “primary” refers to the first stage of material crushing. Unlike fixed plants, these systems are mounted on a mobile chassis and can be transported to different locations as needed.

 What Does It Do? Functions and Purpose

The mobile primary crushing and screening plant performs the following functions:

  • Crushing Large Materials: It breaks down large rocks or concrete extracted from quarries or construction sites into smaller sizes in the primary crushing stage.

  • Material Classification: Crushed materials are separated by vibrating screens into various size fractions, such as 0–5 mm, 5–15 mm, 15–25 mm, etc.

  • On-Site Production: Material is processed directly on-site, minimizing transportation costs and time loss.

  • Supports Recycling: It plays a key role in recycling demolition waste such as concrete, turning it into reusable materials.

 How Does It Work? Operating Principle

These plants typically include the following components:

Feeding Unit (Hopper and Vibrating Feeder)

  • Raw material is loaded into the hopper with a loader or excavator.

  • The vibrating feeder feeds the material into the crusher in a controlled manner and may pre-screen smaller particles.

Primary Crusher (Jaw Crusher or Impact Crusher)

  • The heart of the system.

  • Usually a jaw crusher is used, which crushes material between fixed and moving jaws.

  • Alternatively, impact crushers can be used, especially for softer or less abrasive materials.

 Conveyor Belts

  • Transports crushed material to the screening system or stockpile area.

 Vibrating Screen System

  • Classifies crushed materials into different sizes.

  • Each screen layer separates materials of specific size ranges.

 Stockpiling Conveyors

  • Directs the separated products to stockpiles or further processes.

 Where Is It Used? Application Areas

Thanks to their versatility, these plants are used in many industries:

 Mining and Quarrying

  • Crushing rocks like granite, basalt, and limestone.

 Construction

  • Producing fill and base materials for roads, bridges, and buildings.

  • Reprocessing on-site concrete and asphalt.

Recycling

  • Recycles demolition materials such as concrete, bricks, etc.

Infrastructure and Road Projects

  • Produces base/sub-base materials on-site.

  • Prepares materials for asphalt paving.

 Hydropower and Dam Projects

  • On-site production of aggregate for concrete.

  • Quick material supply in remote locations.

 Advantages

  • Mobility: Can be easily transported to various sites.

  • Quick Setup: Much faster to install than stationary plants.

  • Cost Efficiency: Reduces transportation and operational costs.

  • Environmentally Friendly: Supports recycling and resource conservation.

  • Flexibility: Can be configured for different materials and needs.