Center Drive Concentrator

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Product Details

Center Drive Concentrator (Thickener)

The Center Drive Concentrator (NZ/NZS Series) is a continuous thickening equipment used to increase the solid density of slurry. It features a central drive mechanism and automatic rake lifting system.

It is essential for dewatering concentrate and tailings in Copper, Gold, and Coal plants, recycling clear water (Overflow) back to the process.

Working Principle: Sedimentation & Compression

Separating clear water from solid particles via gravity settling.

Flocculation

Slurry is mixed with flocculant in the central feed well. Fine particles clump together into larger flocs, accelerating the settling speed.

Sedimentation

Solids settle to the bottom tank floor. The weight of the upper layer compresses the lower layer, squeezing out water.

Scraping

Rotating rake arms scrape the thickened sludge to the central discharge cone (Underflow). Clear water overflows the peripheral weir (Overflow).

Center Drive Concentrator Structure

Technical Choice: Center Drive vs. Peripheral Drive

When to choose Center Drive (NZ) over Peripheral Drive (NG)?

Feature	Center Drive (NZ)	Peripheral Drive (NG)
Diameter	Small to Medium (< 24m).	Large (> 24m).
Auto Lifting	Easy (Hydraulic/Electric).	Hard (Complex structure).
Maintenance	Easy (Motor on bridge).	Medium (Roller track wear).
Space	Compact.	Large.

Core Advantages

1. Automatic Rake Lifting

Equipped with an overload protection system. If the sludge bed is too thick, the rake arms automatically lift to prevent damage and lower as torque decreases.

2. High Efficiency

The specialized feed well design dissipates energy and promotes laminar flow, improving settling efficiency by 30% compared to traditional designs.

3. Robust Drive

Uses a planetary gear reducer for high torque transmission. The main bearing is a heavy-duty slewing bearing, ensuring long service life.

Typical Applications

● Concentrate Dewatering:
Thickening Copper, Gold, and Iron concentrate before the Ceramic Filter or Press.
● Tailings Management:
Thickening tailings to 60-70% density for dry stacking or backfill. See Tailings Solution.
● Water Recovery:
Clarifying process water from coal washing or sand washing plants for recycling.
● Leaching Circuit:
CCD (Counter Current Decantation) washing in Gold Cyanidation (CIL/CIP) plants.

Technical Parameters (NZ Series)

Model	Diameter (m)	Depth (m)	Area (m²)	Capacity (t/d)	Power (kW)
NZ-1.8	1.8	1.8	2.55	1.3 - 5.6	1.1
NZ-3.6	3.6	1.8	10.2	5 - 24	1.1
NZ-6	6.0	3.0	28.0	14 - 62	3.0
NZ-9	9.0	3.0	63.5	32 - 150	3.0
NZ-12	12.0	3.5	113.0	56 - 250	3.0
NZ-15	15.0	3.6	176.0	88 - 390	5.5
NZ-24	24.0	4.4	452.0	200 - 1440	7.5

Frequently Asked Questions (FAQ)

Q: Do you supply the tank?

A: For small models (up to NZ-9), we can supply the steel tank. For larger models (NZ-12 and above), we usually supply the Mechanism (Drive, Shaft, Rakes) and the customer builds the Concrete Tank on-site.

Q: What flocculant should I use?

A: It depends on the mineral. Anionic Polyacrylamide (PAM) is commonly used for mineral tailings. We recommend doing a settling test to find the best type and dosage.

Q: How does the auto-lift work?

A: The system monitors the torque of the main shaft. If the sludge bed rises and torque exceeds a set limit, the hydraulic/electric actuator lifts the rakes. Once torque drops, it lowers them back down.

Efficient Water Recovery

Ensure continuous operation and clear water return with OreSolution Thickener.
Contact us for tank sizing and flocculant advice.

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