Here’s a detailed flow chart description for a primary, secondary, and tertiary crusher system in a mineral processing or aggregate production plant. The process is designed to progressively reduce the size of raw material to the desired final product.
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Flow Chart of Primary, Secondary, and Tertiary Crushers
1. Feed Material Intake
- The process begins with the delivery of raw material (e.g., large rocks, ore, or quarry stone) to the primary crusher. The feed material is typically dumped into a hopper or directly onto a vibrating grizzly feeder, which removes fine particles and directs oversized material to the primary crusher.
2. Primary Crushing Stage
- Primary Crusher: Usually a jaw crusher or gyratory crusher, designed to handle large-sized feed material. The primary crusher breaks down the raw material into smaller, more manageable pieces (typically 6–12 inches in diameter).
- Output: The crushed material is discharged onto a conveyor belt and transported to the next stage. A scalping screen may be used to remove undersized material before secondary crushing.
3. Secondary Crushing Stage
- Secondary Crusher: Often a cone crusher or impact crusher, which further reduces the size of the material (to around 1–3 inches). This stage ensures uniformity and prepares the material for final grinding or additional processing.
- Screening: The output from the secondary crusher is often screened to separate finer particles. Oversized material may be recirculated back to the secondary crusher for further reduction.
4. Tertiary Crushing Stage
- Tertiary Crusher: Typically a cone crusher or vertical shaft impactor (VSI), used for fine-tuning the product size (down to 0.5 inches or smaller). This stage produces cubical-shaped aggregates or finely crushed ore for downstream processes like milling.
- Final Screening: The crushed material passes through a final screening unit to classify it into specific size fractions (e.g., sand, gravel, or customized aggregate sizes). Oversized particles may be sent back for re-crushing.
5. Product Stockpiling
- The final product is conveyed to designated stockpiles based on size specifications. From here, it can be transported for further processing (e.g., washing, grinding) or directly shipped for industrial use (e.g., construction, road base).
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