Peripheral Rack and Pinion Drive Thickener

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Product Details

Peripheral Rack and Pinion Drive Thickener (NT Series)

The NT Type Thickener is a heavy-duty sedimentation equipment driven by a Rack and Pinion system on the tank periphery. This positive drive mechanism eliminates slippage, making it superior to roller friction drives.

With diameters ranging from 15m to 53m, it provides massive torque for thickening high-density tailings and coal slime in large-scale Tailings Management projects.

Working Principle: Positive Gear Drive

High torque transmission via rack and pinion mesh.

Drive Mechanism

A toothed rack is mounted on the circular track. The motor-driven pinion gear meshes with this rack, pushing the bridge forward without slipping.

Torque Transmission

The positive engagement allows for much higher torque transmission than friction rollers, enabling the rakes to plow through heavy sludge.

Raking & Discharge

The long rake arms rotate slowly, scraping settled solids to the center. The center column supports the bridge but does not bear the drive torque.

Rack and Pinion Drive Thickener Structure

Technical Choice: Rack & Pinion vs. Roller Drive

Why choose the NT Rack Drive over the standard NG Roller Drive?

Feature	Rack & Pinion Drive (NT)	Roller Drive (NG)
Traction	Positive (Gear Mesh).	Friction (Wheel on Rail).
Slippage Risk	Zero (No slip).	High (In rain/ice/overload).
Torque Capacity	Very High.	Medium.
Weather Resistance	Excellent (All-weather).	Poor (Affected by ice).

Core Advantages

1. No Slippage

The gear mesh ensures constant movement even in icy or wet conditions, solving the common "slipping wheel" problem of roller drive thickeners in winter.

2. High Torque

Delivers 30% more torque than roller drives with the same motor power, allowing it to handle heavier sludge loads without stalling.

3. Smooth Operation

The precise rack alignment ensures smooth rotation of the 50m+ bridge, reducing structural stress and vibration.

Typical Applications

● Heavy Tailings:
Ideal for Iron, Lead-Zinc, and Copper tailings where sludge density is high. See Iron Ore Solution.
● Cold Climate Operations:
Essential for plants in Russia, Canada, or North China where ice causes roller slip.
● Coal Preparation:
Handling large volumes of coal slime water in mega washeries.
● Wastewater Treatment:
Primary clarifiers in large municipal or industrial sewage plants.

Technical Parameters (NT Series)

Model	Diameter (m)	Depth (m)	Capacity (t/d)	Power (kW)	Weight (t)
NT-15	15	3.5	87 - 390	5.5	11.7
NT-18	18	3.5	560	5.5	12.1
NT-24	24	3.4	1,000	7.5	28.3
NT-30	30	3.94	1,560	7.5	31.0
NT-45	45	5.06	2,400	11	58.0
NT-53	53	5.07	3,000	11	69.4

Frequently Asked Questions (FAQ)

Q: Does the rack wear out quickly?

A: No. The rack is made of hardened steel and operates at a very low speed (peripheral speed < 10m/min). With proper lubrication, it lasts for many years.

Q: Can I retrofit my existing roller drive thickener?

A: Yes. We can provide a modification kit to install the rack segments onto your existing concrete wall and replace the drive carriage, upgrading it to a positive drive system.

Q: How do you ship a 50m thickener?

A: We don't ship the tank. We supply the Drive Mechanism, Bridge (in sections), Center Column, and Rake Arms. The concrete tank is built on-site by the client according to our civil engineering drawings.

Reliable Drive for Mega Tanks

Eliminate drive slippage and downtime with OreSolution NT Rack Drive Thickener.
Contact us for bridge design and drive unit pricing.

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