Multi Gravity Mozley Separator Drum

The Laboratory Multi-Gravity Separator is a high-performance mineral separation machine designed to separate fine particles based on differences in specific gravity.
It operates on principles similar to a shaking table but enhances efficiency by using a rotating conical drum, which generates higher centrifugal force. This allows separation of extremely fine particles within a thin liquid film.
The machine is capable of delivering performance comparable to larger industrial systems when operated under similar conditions.

INSTALLATION & SETUP :

Placement

• Install on a level concrete floor
• Secure using anchor bolts

Handling :

• Lift using forklift from main frame
• Can be moved on flat surfaces using wheels

Connections :

• Feed pipe connection (~12.5 mm hose)
• Wash water connection via rotameter
• Electrical supply via rear isolator (by qualified electrician)

WORKING PRINCIPLE

• The machine consists of a rotating tapered drum combined with a shaking motion.

Process Flow:

• Feed slurry enters the drum
• Rotation creates centrifugal force
• Shaking motion adds shearing effect
• Dense particles move toward drum wall
• Scrapers push heavy particles → concentrate outlet
• Lighter particles flow with water → tailings outlet

Key Concept :

• Separation occurs in a thin flowing film inside the drum

Combines :

• Gravity separation
• Centrifugal force
• Mechanical vibration

OPERATING PARAMETERS (CONTROL VARIABLES)

Important Adjustments :

• Tilt angle → affects grade
• Rotational speed → affects recovery
• Wash water → controls purity vs loss
• Amplitude & shake → controls separation intensity

Optimization Guidelines :

• High speed + high tilt → better grade
• More water → cleaner concentrate but higher loss
• Low speed → less concentrate

TESTING PROCEDURE (SIMPLIFIED)

• Use minimum 10 kg sample

Maintain :

• Tilt: 4°
• Speed: mid-range
• Wash water: ~3 L/min
• Feed continuously (1–2 L/min)
• Wait for stable operation (2–5 min)

Collect :

• Concentrate
• Tailings
• Dry, weigh, and analyze results

MAINTENANCE

Routine Checks :

• Tighten nuts & bolts
• Inspect belts, bearings, seals
• Lubricate regularly (lithium grease)
• Check scraper condition

Belt System :

• Adjust tension regularly
• Replace worn belts

TROUBLESHOOTING

Problem: No or Low Concentrate

• Speed too low → increase
• Water too high → reduce
• Tilt too steep → reduce
• Scrapers damaged → replace

Problem: Too Much Concentrate

• Speed too high → reduce
• Water too low → increase
• Tilt too low → increase

Problem: Machine Vibrates

• Loose bolts → tighten
• Uneven footing → adjust

Important Warning :

• Do not operate without wash water
• Do not overload (can damage belts)

• Mineral processing and beneficiation
• Separation of fine metals and ores
• Laboratory testing and pilot-scale studies

Gravity concentration of :

• High-density minerals (e.g., cassiterite, magnetite)
• Low-density minerals (e.g., barytes)

Net Weight :

• 350 kg

Gross Weight Packed :

• 520 kg

Dimensions :

• 162 × 71 × 109 cm

Packed Dimensions :

• 183 × 97 × 142 cm

Power Requirements :

• 1 × 0.55 kW electric motor1 × 0.75 kW electric motor

Supply Options :

• 110V / 1 phase / 60Hz240V / 1 phase / 50Hz380/415V / 3 phase / 50Hz

Drive System :

• Pulleys with “V” and toothed belts

Capacity :

• Up to 0.2 t/hr (dry basis)

Feed Particle Range :

• 150 µm to 5 µm

Feed Pulp Density :

• 10% to 60% solids (w/w)

Operating Parameters :

Rotational Speed :

• Infinitely variable from 100 to 280 rpm

Shake Amplitude :

• 10 / 15 / 20 mm

Tilt Angle :

• 0 to 9°

Wash Water :

• 0 to 15 L/min

Materials of Construction :

Frames :

• Mild steel; paint finish to Gravity Mining specification

Drum Shell, Shafts & Scraper Bars :

• Stainless steel

Drum Lining & Scrapers :

• Polyurethane

Covers :

• Stainless steel

Feed particle size :

• 5 to 120 microns

Throughput capacity :

• 50 to 200 kg/hr (dry solids)

Optimal throughput :

• ~100 kg/hr (for fine solids <75 µm)

Feed pulp density :

• 15% to 50% solids (typical: 30–40%)

Drum rotational speed :

• 100 – 280 RPM

Shake frequency :

• Adjustable (factory preset usually sufficient)

Amplitude options :

• 10 mm
• 15 mm (default)
• 20 mm

Tilt angle :

• ~4° (typical)

Wash water flow rate :

• 0 – 10 L/min

Low density minerals :

• ~2 L/min

High density minerals :

• ≥6 L/min

• High-efficiency separation of ultra-fine minerals
• Uses centrifugal force + shaking motion for enhanced recovery

Adjustable parameters :

• Speed

• Tilt

• Amplitude

• Wash water

• Continuous operation capability

• Internal scraper system for automatic concentrate removal

• Compact design with mobility (castor wheels)

• Capable of achieving high-grade concentrate with good recovery