1. Sedimentation

Sedimentation

DELKOR supplies its clients with a wide variety of thickening equipment, with designs of up to 100 m in diameter.

DELKOR offers a comprehensive range of thickeners and clarifiers.

The thickener range offers designs up to 100 m in diameter, catering for a variety of applications in the minerals, industrial, chemical, water treatment and waste water industries. As the industry specialist in sedimentation, we offer both welded and bolted designs for elevated steel tanks and can supply the bridge, mechanism and drive for concrete tanks too. In addition, DELKOR can retrofit existing tanks with its advanced thickener technology.

Some of the advantages of DELKOR thickeners include:

  • Lightweight yet sturdy design using the latest in Finite Element Analysis (FEA) techniques to maximize strength and equipment life while minimizing material costs.
  • Hydraulic or electric drives – known worldwide for their reliability.
  • Extensive test work and operational database.
  • Advanced Computational Fluid Dynamics (CFD) designed feedwell to optimize mixing and minimize flocculant consumption.
  • Advanced froth management systems to minimize froth generation and maximize overflow clarity.

DELKOR High Rate Thickeners

The high rate thickener is a proven performer in a variety of different applications around the world. The wealth of experience and large database of results means that DELKOR can optimize the thickener size and design for every application and our recommendations can be guaranteed with performance warranties. Bench scale testing on representative samples is generally all that is required to size a thickener, but site pilot tests are also available.

DELKOR High Density Thickeners

The high density thickener was a result of clients requiring higher underflow densities and improved water recoveries, without extra cost in the pumping system for transport. By increasing the height of the solids bed within the DELKOR high density thickener, higher densities can be achieved.

DELKOR Paste Thickeners

The paste thickener accommodates the extreme mechanical and process requirements needed when dealing with high rheology underflows. With years of bench scale, site pilot testing and operational thickener experience, DELKOR can quickly and accurately determine the optimal paste thickener specification for your application.

Our paste thickeners employ advanced shear thinning technology which consists of the following devices:

  • Primary thickening vessel.
  • Shear thinning vessel.
  • Shear thinning recirculation pump.

The advantages of DELKOR's shear thinning system are:

  • Provides the lowest yield stress relative to energy input of any shear thinning system.
  • Can be retrofitted to any existing thickener underflow system.
  • No short circuiting of unsheared material through the shear thinning vessel.
  • Optimized using CFD modeling.
  • Shear vessel insert further reduces yield stress as well as injecting the sheared material into the thickener underflow stream.

DELKOR Conventional Thickeners

The conventional thickener is often used where the use of flocculant is problematic or expensive. The large area and low rise rates allow for particles to settle with little or no flocculant addition.

DELKOR's clarification range includes pinned bed clarifiers and sludge bed clarifiers.

The DELKOR Pinned Bed Clarifier

The pinned bed clarifier is a unique process for hydrometallurgical plants where solution clarity is important. A technology for polishing feed solutions for solvent-extraction plants, the unit offers low suspended solids counts in overflows, regularly achieving clarities of less than 50 ppm solids, and as low as 20 ppm.

Benefits of the DELKOR pinned bed clarifier include:

  • Low capital expenditure for comparative clarifying technology.
  • No moving parts, virtually eliminating the need for maintenance.
  • Robust and stable performance.
  • Optimized to minimize flocculant consumption.
  • Small footprint.

The DELKOR Sludge Bed Clarifier

The sludge bed clarifier is typically used when overflow clarity is critical. With sizes up to 30 m in diameter, DELKOR customizes each clarifier design, supplying a bridge and mechanism for concrete or supplying it with an elevated steel tank. The unit produces overflows that are low in suspended solids (< 25 ppm). Efficient de-aeration, flocculation and mixing is achieved in the external de-aerator/mixing vessel.

Some of the advantages of the DELKOR sludge bed clarifier include:

  • Lightweight yet sturdy design using the latest in FEA techniques to maximize strength and equipment life while minimizing material costs.
  • Scissor lift drive – known worldwide for its reliability.
  • Extensive testwork database.
  • Adept at handling changes to process flow and solids content.
  • Very low or no flocculant consumption.
  • Value for Money

    Value for Money

    • We offer both welded and bolted designs for elevated steel tanks, and can also supply the bridge, mechanism and drive for concrete tanks
    • Low flocculant consumption
  • Efficiency

    Efficiency

    • We design, fabricate and supply a comprehensive range of thickeners and clarifiers
    • Our thickener range includes high-rate thickeners, high-density thickeners, paste thickeners and conventional thickeners  and offers designs up to 100m in diameter, catering for a variety of applications in various industries
    • Our clarifier range includes pinned-bed clarifiers and sludge-bed clarifiers
  • Service

    Service

    • Lightweight yet sturdy design using the latest Finite Element Analysis (FEA) techniques to maximize strength and equipment life while minimizing material cost
    • Hydraulic or electric drive solutions for our thickeners
    • Scissor lift drives for our clarifiers
  • Reference

    Reference

    • We are able to conduct extensive testwork and boast a significant operational database to draw from
  • Technical Excellence

    Technical Excellence

    • Advanced CFD designed feedwells to optimize mixing and minimize flocculant consumption
    • Advanced froth management systems to minimize froth generation and maximize overflow clarity

Download DELKOR Thickener Brochure

References

  • Customer
    Project name
    Office Cherifin des Phosphate S.A
    Morocco
    2011-2015

    High rate thickeners for rock phosphate product

    DELKOR received two major orders from OCP S.A Morocco for the design, engineering, supply, erection and commissioning of nine high rate thickeners (HRT) for the Khouribga Mine To Jorf-Lasfar Ore Slurry Transport Project. The two orders included the supply of two 45 m thickeners, two 50 m thickeners, three 40 m thickeners and two 80 m thickeners for rock phosphate product and tailing applications.

    All HRT drives were manufactured at the company’s plants in Bangalore, India; with partial fabrication being carried out in Morocco. Major components were also manufactured at the plants in Bangalore employing sophisticated 3D software that was used for design and detailed finite element modeling analyses of all equipment.

    The HRT is a proven performer in a variety of applications across the mineral, industrial, chemical, water treatment and waste-water industries.

    With units ranging up to 100 m in diameter being available and having been successfully installed, the benefits of the DELKOR HRT include low capital cost, a smaller footprint, effective use of flocculant and advanced automation.

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