Industrial minerals like limestone, quartz, and feldspar require specialized fine grinding equipment to achieve precise particle sizes for construction, ceramics, and chemical applications. Modern crushing-sand-making lines integrate advanced technologies to optimize efficiency and product quality.
1. Vertical Shaft Impact Crusher (VSI): Key for shaping and refining particles
– Capacity: 50-500 t/h
– Max Feed Size: 45-60mm
– Output Fineness: 0-5mm adjustable
2. High-Pressure Grinding Roll (HPGR): Energy-efficient micron-level grinding
– Roll Diameter: 600-2400mm
– Power: 2×90-2x650kW
– Product Size: 80% below 75μm
3. Air Classifier Mill: For ultra-fine powders (d97 < 10μm)
| Stage | Equipment | Key Parameters |
|---|---|---|
| Primary Crushing | Jaw Crusher | Feed: ≤1200mm, Output: ≤350mm |
| Secondary Crushing | Cone Crusher | Closed-side Setting: 20-50mm |
| Tertiary Grinding | VSI Crusher | Cubic-shaped output ≥90% |
| Screening | Trommel Screen | 4-5 Deck, Mesh: 3-30mm |
Q1: How to reduce over-grinding?
A: Implement multi-stage classification with hydrocyclones or air separators.
Q2: Optimal moisture content for grinding?
A: Keep below 3% for dry milling; up to 8% for wet processes.
