The Comprehensive Guide to Crushing and Sand-Making in the Aggregate Industry
The global construction boom has driven exponential demand for high-quality aggregates, including crushed stone, sand, and gravel. As urbanization accelerates, the crushing and sand-making sector has become pivotal in supplying raw materials for infrastructure, concrete, and road construction. With stricter environmental regulations and the need for sustainable practices, modern crushing plants are evolving toward energy efficiency and automation.
1. Key Equipment
– Jaw Crushers: Primary crushing for hard rocks (e.g., granite, basalt).
– Cone/Impact Crushers: Secondary/tertiary crushing to refine particle size.
– Sand Makers (VSI/HVI): Produce cubical sand by crushing or shaping coarse aggregates.
– Screening Systems: Classify materials into graded sizes (e.g., 0–5mm, 5–20mm).
2. Process Flow
– Dry Process: No water used; dust control via bag filters. Ideal for arid regions.
– Wet Process: Water spray reduces dust but requires slurry treatment.
3. Material Selection
– Soft limestone → Impact crushers for higher yield.
– Abrasive basalt → Cone crushers with wear-resistant liners.
1. How to reduce crusher wear costs?
– Use layered crushing (primary → secondary) to minimize direct abrasion.
– Opt for manganese steel liners in high-abrasion zones.
2. Dry vs. Wet Sand-Making?
– Dry: Lower OPEX but higher dust emissions.
– Wet: Cleaner output but 15–20% higher water/energy use.
3. Regulatory Compliance?
– Noise barriers (<75 dB) and PM2.5 filters are mandatory in EU/NA markets.
– Primary: JC110 jaw crusher (180mm feed).
– Secondary: HST315 cone crusher (CSS=25mm).
– Sand-making: VSI6X with deep rotor for 30% higher throughput.
The crushing/sand-making industry is shifting toward precision, sustainability, and automation. Tailoring solutions to material properties and end-use requirements ensures competitiveness in a resource-scarce era.
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