The Eagle Iron Works Diefenbach Thickeners deliver advanced liquid-solid separation and water recovery solutions for high-volume industrial, mining, and aggregate applications. As part of the McLanahan and Eagle Iron Works equipment portfolio, these thickeners combine decades of engineering expertise with modern design principles to help operators manage tailings, recycle process water, and reduce the volume of slurry reporting to storage or settling ponds.

At their core, Diefenbach thickeners are comprised of a tank, feed pipe feedwell, rake (and pickets, depending on the thickener style), a bridge containing the rake drive mechanism, and a chemical dosing system. Slurry enters through the feedwell, where added chemicals help fine particles clump and settle. The rake system gently moves settled solids toward the discharge cone while clarified liquid - often virtually free of solids - overflows the weir and can be returned to other plant processes.

This efficient design allows high rate thickeners and paste thickeners accelerates settling and optimises the density of the underflow - the concentrated solids stream. Diefenbach’s feedwell and auto-dilution options help achieve rapid settling without excessive chemical use, making these machines especially effective for applications like tailings management, counter-current decantation (CCD) washing, and wastewater clarification.

One of the key advantages of EIW thickeners is their ability to recover large volumes of water for reuse in wash plants or mineral processing circuits. By separating solids and liquids efficiently, these thickeners reduce fresh water demand, minimise waste pond size, and improve overall plant sustainability. Liquid overflow from the thickener can be reused as process water, while the dewatered solids can be further processed, stockpiled, or managed in downstream systems.

Diefenbach’s range includes high-rate thickeners, ideal for immediate water recovery, and paste thickeners, which produce a very dense underflow for applications requiring minimal water content and reduced storage footprint. Optional automation and remote monitoring systems help operators maintain optimal control of bed levels, underflow density, and rake lift settings for consistent performance.

Available through Onetrak, these machines bring together global experience in separation technology and robust field support. As part of the McLanahan family of companies, Diefenbach thickeners are supported with full parts, service, and field assistance, making them a dependable water-management and solids-handling solution for today’s wash plants, mining operations, and aggregate facilities.

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