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Thread: Powder Screening Challenge

  1. #1
    Paulywibble Guest

    Question Powder Screening Challenge

    I am currently examing the feasability of screening circa 50 kg/hr of metal powder to give a d(100) of 20 micron. This should give circa 15% oversize based on lab jet seive tests with an alpine jet sieve.

    Can anyone recommend a cost effective (preferably continuous) machine ?

  2. #2
    Adi_Mogilevsky Guest

    Metal Powders Classification by Size

    We think our cost/effective continuous classification machines could meet your metal powders by size classification needs:


    The TriboClassifier™ developed and patented ( USA # 6,439,394 B1 and # 6,095,965 ) by “SorTech Separation Technologies LTD” uses a new technology for dry bulk powder process separation and classification.

    The TriboClassifier™ uses a rotating conical bowl and has a surface roughness and rotational speed calculated to best suit the particular classification requirement.

    The TriboClassifier™ is fully enclosed with a small footprint, a very modest power requirement and can process powder at the rate of several kilograms to tons per hour.

    The machine you are talking about is TC 80-1-1 ( see photo).
    We have one almost brand new machine that is ready for deployment immediately.

  3. Thumbs up Fine Screening Using Production Air Jet Screen

    You may find that several companies in the UK should have a solution for you. Possible options would be -

    1) to use a Continous Production version of the Air Jet Sieve which is very successful with fine metal powder screening. I'm not sure if this unit is still available.

    2) to use screening equipment equipped with air cleaning or ultrasonics. To achieve good yields and the fineness of product at the rate could be a big machine

    2) to use Air Classification. at the throughput and fineness you are considering a small Air Classification system maybe sufficient such as the Alpine 50ATP or British Rema Minisplit.

    If you need any further assistance and details of companies to approach please contact me direct

  4. #4

    continuous screening process

    Dear Sir,

    You might be interested to find out more about the technology applied by Kroosh Tecnologies. Air Classification gives you a statistical separation.. Airknives or ultrasonic have proven to be costly and maintenance prone.

    By applying a totally different concept they have been successful in the fraction you are seeking.

    Good luck,
    best regards,
    Fedor Schiefer

  5. #5
    Vic Maroscher Guest
    This is a common application for our lab and pilot size gyratory sieves in 10", 12" or 15" screen diameter. Ultrasonic deblinding of the screen is required for 20 micron. Typically we use a self-feed hopper (which can be purged) mounted above the unit. The material is metered to the center of the screen surface. Likewise, the +20 micron powder is continuously removed.

    The cost is competitive to the Alpine Jet sieve.

    Please e-mail me directly at and I'll forward sample photos, drawings, and case studies.

    Best Regards,

    Vic Maroscher
    fax: 330-332-1543

  6. Sweco can offer several solutions to your problem. For instance, our Turbo-Screen Air Classifier would be an ideal solution to your problem. We could also go with a standard round separator (possibly a 48 inch diameter machine) utilizing a new device recently developed call a "Screen Energizer".

    Because of the size of the particles of your application, its very difficult to say what would work best without testing the material first. Sweco does offer its customers a full service lab facility for just this purpose. My suggestion is for you to set up a test with Sweco by sending in a sample of the material. We could better determine the exact method and equipment to use to attain your separation goals.

    Sweco has facilities in:
    Florence, Kentucky +1 (859) 371-4360
    Nivelles, Belgium +32 (67) 89 3434
    and Singapore +65 (67) 62 1167

    Thank You!
    Jeff Dierig
    Sweco Marketing Manager

  7. #7
    Larry Stone - Kason Corp., USA Guest
    It is possible that a circular vibratory screening machine with ultrasoncic enhancement will process you material. Why guess? Contact Mark Blairs at our Stoke -On -Trent facility to arrange a test. tel 01782-597 540 or email
    to arrange for a test.
    Larry Stone

  8. #8

    Thumbs up

    HK Technologies has developed a screener that will fit your need perfectly. This machine is our Hybrute model. This unit is an incline type screener combined with ultrasonics and mechanical vibration. The Hybrute is competitvely priced.

    20 microns at 50kg/hr should not be a problem for the hybrute but to be positive HK offers free sample runs with product returned along with video of trial run.

    Please feel free to call me at our plant with any questions.
    Thank You
    Lee Hochadel

  9. #9
    martin c Guest

    Smile Metal powder screen

    Russell finex Ltd are world leaders in metal powder seperation technolgy.We can offer the perfect solution to achieve your seperation using a standard compact screener.
    Due to the 20mic mesh we would reccomend that ultrasonic screen activity is used.
    The mesh ultrasonics were invented by Russell finex specifically for metal powders and we have many worldwide references using this technology at these mesh sizes.
    If required Proving trials can be conducted either at our Head office in London or at our subsid factories in belgium or america.
    Please view our web site for info and references or to speak to one of our sales engineers
    martin chipperfield

  10. #10
    Join Date
    Oct 03

    Centrifugal Screening

    Dear Sir
    We have recently conducted several sifting trials using the Gericke Centrifugal Sifter for metal powders down to a 25 micron screen size. All of our clients agree that this method of screening is far superior and more cost efficient than there current methods. Please contact me if you wish to discuss more specifics for your requirements.
    Best Regards
    Rick Isherwood
    Powder Technologies, Inc.

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