Thickening is critical in iron ore processing to concentrate slurry and recover water. Common methods include:
1. Gravity Thickeners: Utilize sedimentation with rakes (e.g.,直径20–100m, underflow density 45–65% solids).
2. High-Rate Thickeners: Feature deeper tanks and flocculants for faster settling (e.g.,处理量 up to 15t/m²/hr).
3. Paste Thickeners: Produce dense underflow (>65% solids) for dry stacking.
To repurpose iron ore tailings into sand/aggregates, a typical生产线配置includes:
– Primary Jaw Crusher: PE600×900 (Feed: ≤500mm, Output: 65–160mm).
– Secondary Cone Crusher: HPT300 (Capacity: 70–350t/h, Closed-side setting: 6–38mm).
– Tertiary VSI Crusher: B9100SE (Throughput: 200–360t/h, Product shape: cubic).
| Equipment | Key Parameters |
|---|---|
| Vibrating Screen | Deck: 2–3 layers, Mesh: 3–50mm |
| Sand Washer | Capacity: 30–200t/h, Water consumption: 50–80m³/h |
Q1: How to reduce dust in crushing iron ore?
A: Use wet suppression or bag filters (efficiency >99%).
Q2: What’s the ideal moisture for sand from tailings?
A: 3–5% after dewatering screens.
Project: A Brazilian iron ore plant converted tailings into construction sand using:
– Primary crushing → HP300 cone crusher → CV217 VSI → TS5X3075 screen.
Result: Produced 450t/h of ASTM C33-compliant sand with <0.075mm content under
