flow sheet of iron ore beneficiation plant

Here’s a simplified flow sheet for a typical iron ore beneficiation plant, covering the major stages from raw ore to final concentrate:

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Iron Ore Beneficiation Plant Flow Sheet

# 1. Crushing & Screening
– Primary Crushing: (Jaw/Gyratory Crusher) → Breaks large lumps (500–1000 mm) to ~150–250 mm.
– Secondary Crushing: (Cone Crusher) → Reduces size to ~30–50 mm.
– Screening: Vibrating screens separate oversize material for re-crushing.

# 2. Grinding
– Ball Mill/Rod Mill: Further reduces ore to fine particles (~0.1–0.3 mm).
– Hydrocyclones: Classify slurry into coarse (returned to mill) and fine fractions.

# 3. Beneficiation (Separation)
## a. Gravity Separation (For coarse hematite/liberated ores)
– Spiral Classifiers/Jigs → Removes silica/phosphorus based on density differences.
## b. Magnetic Separation (For magnetite ore*
– Low-Intensity Magnetic Separators (LIMS) → Captures magnetite particles.
## c. Flotation (For fine ores/sulfide removal)
– Reverse flotation → Silica is floated away from iron using amines as collectors.

# 4. Dewatering & Tailings Management
– Thickeners: Concentrate slurry is thickened to ~60% solids.
– Filters (Vacuum/Disc): Further dewatering to ~8–12% moisture for pellet feed.
– Tailings Storage Facility (TSF): Waste slurry is stored in dams after water recovery.

# 5. Product Handling
– Final concentrate (~65–67% Fe) is transported for pelletizing/sintering or direct shipping.

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Key Equipment Used:
– Crushers, Screens, Ball Mills, Hydrocyclones, Magnetic Separators, Spiral Concentrators, Flotation Cells, Thickeners, Filters.

Variations:
– For low-grade ores (hematite/goethite), additional steps like scrubbing/washing may be added to remove clay/loamy material.

Would you like a more detailed breakdown of any specific section?