High-Rate Thickeners, also known as Clarifiers, are designed to recover immediately reusable process water for mineral processing, aggregate operations, and environmental applications.
These systems provide an efficient water management solution for operations where water supply is limited or expensive, where recirculated water quality is unsuitable for reuse, or where tailings ponds need to be reduced due to environmental or permitting requirements.
Engineered for high-efficiency water recovery, High-Rate Thickeners can recover approximately 85% of water from an effluent feed stream, delivering reusable process water while significantly reducing slurry volumes reporting to tailings dams. This improved water recovery helps minimise water consumption, reduce environmental impact, and support more sustainable plant operations.
The UltraCLEAR® range includes:
HRT10 – 10m Diameter
HRT12 – 12m Diameter
HRT15 – 15m Diameter
Integration of McLanahan High-Rate Thickeners into existing plant operations is straightforward, with advanced control systems managing most operational functions automatically. McLanahan also provides operator training covering flocculant preparation, chemical dosing, and overall Thickener operation to ensure maximum performance and reliability.
How It Works
High-Rate Thickeners separate liquids from solids through a process known as hindered settling. Rotating rake arms collect settled sludge and move it toward the central discharge cone for removal. Minimal amounts of polymers and chemicals are required to settle solids efficiently, making the system both cost-effective and environmentally friendly.
The system is operated through a modern touch-screen programmable logic controller (PLC), allowing customised control based on plant requirements. Automated operating logic enables the Thickener to continue operating safely without constant operator supervision during extended production periods.
A hydraulic drive system continuously monitors torque levels on the rake mechanism. Under high torque conditions, an automatic rake lift system activates to raise the rakes from the settled material, protecting the equipment and maintaining reliable operation. The system then gradually lowers the rakes back into position while continuously monitoring torque levels for optimal performance and equipment protection.
