Process Flow Chart of a VSI Crusher Plant
A Vertical Shaft Impact (VSI) crusher plant is designed to produce high-quality sand and aggregates for construction, mining, and industrial applications. The process involves several stages, from raw material feeding to final product classification. Below is a detailed breakdown of the typical workflow in a VSI crusher plant.
1. Raw Material Feeding
The process begins with the loading of raw materials, such as rocks, gravel, or boulders, into the primary feeding system. A vibrating feeder or conveyor belt ensures a steady and controlled supply of material to the crusher. Oversized materials may be pre-screened to remove unwanted debris before entering the crushing chamber.
2. Primary Crushing (Optional)
In some setups, a primary jaw or cone crusher is used to reduce large-sized rocks into smaller fragments before they enter the VSI crusher. This step improves efficiency by minimizing direct impact on the VSI rotor and extending its lifespan.
3. VSI Crushing Stage
The core of the plant is the VSI crusher, which utilizes a high-speed rotor to throw rocks against anvils or rock-lined chambers. The impact force breaks down materials into finer particles while shaping them into cubical aggregates—ideal for concrete and asphalt production. Adjustable rotor speed and cascade feed systems optimize particle size distribution.
4. Screening & Classification
Crushed material exits the VSI crusher and moves to a vibrating screen for classification. Multiple deck screens separate particles into different size fractions:
- Oversized material is recirculated back to the VSI for further crushing (closed-circuit operation).
- Mid-sized aggregates may undergo additional processing if required.
- Fine sand and dust are collected for use in specific applications like plastering or masonry work.
5. Washing & Dewatering (Optional)
For high-quality sand production, some plants include a washing system to remove impurities like clay or silt. A sand washer or hydrocyclone cleans the material before dewatering screens remove excess moisture, ensuring dry final products ready for storage or transport.
6. Final Product Storage & Dispatch
Processed aggregates are conveyed to designated stockpiles based on size specifications (e.g., 0–5mm sand, 5–20mm gravel). Loaders or automated systems transfer finished products to trucks or railcars for distribution to construction