Knudsen bowl concentrator?
Last Post 12 Oct 2017 05:07 PM by WILLIAM HALL. 9 Replies.
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DAVID HAYUser is Offline
Greenhorn
Greenhorn
Posts:14



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18 Sep 2017 10:10 AM
    I've watched a few videos of different machines but can't tell which direction they spin.
    I know which direction I think they should.

    If one were to stick their finger in a ridge half way down, then spun the bowl the correct direction, would their finger end up at the top or bottom?

    Thank you
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    WILLIAM HALLUser is Offline
    Lost Dutchman
    Lost Dutchman
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    19 Sep 2017 05:20 PM
    Neither the top nor the bottom, your finger "should" end at the middle hole where the heavies would drop through into a catch cup

    Bill
    So much river....So little time....Get out there
    DAVID HAYUser is Offline
    Greenhorn
    Greenhorn
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    19 Sep 2017 05:34 PM
    My understanding was that the Knudsen Bowl was a deep cone not a flat spiral wheel. Fed by a pipe down the center to close to the bottom. The axis is vertical, not tilted. It was spun fairly fast, not slow like a wheel. Lots of water circulated till done, then a plug removed in the bottom and everything left was flushed out.
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    WILLIAM HALLUser is Offline
    Lost Dutchman
    Lost Dutchman
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    20 Sep 2017 05:15 PM
    Sorry, thought it was a wheel
    Learn something new today LOL

    Jump over to golddredgerdotcom, ask the question there
    A member used to own a prospecting store in socal, Im sure he would know
    The fellow is HoserJohn, if he dont know, no one will

    Bill
    So much river....So little time....Get out there
    DAVID HAYUser is Offline
    Greenhorn
    Greenhorn
    Posts:14



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    20 Sep 2017 07:24 PM
    Thanks,

    That's a new forum on me, I thought I had researched for all of them.
    I'll check it out.
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    WALTER EASONUser is Online
    Buzzard
    Buzzard
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    25 Sep 2017 07:49 AM
    This will explain how the Knudsen Bowl works, newer versions also have an automated extraction of heavy materials without shutting down. here is a video of the workings explained:  https://www.youtube.com/watch?v=h1NEG0xQI-g&feature=youtu.be



    If you notice an error in the Online Mining Guide or with claim information please add in the updated information into the online mining guide to inform other members. Thank You Walter H. Eason
    DAVID HAYUser is Offline
    Greenhorn
    Greenhorn
    Posts:14



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    26 Sep 2017 11:37 AM
    Thanks Walter,

    That link didn't take me to any particular video. There was a list of totally unrelated vids after just one about a Knelson concentrator.
    A Knelson concentrator is a deep cone but with concentric rings, not a spiral groove, as well as other patented special high tech features.
    I couldn't find any new vids that answer my question. Sorry.
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    WALTER EASONUser is Online
    Buzzard
    Buzzard
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    27 Sep 2017 08:16 AM

     you may need to cut and paste or search the name of video on y tube.

    MM35 knelson concentrator:    https://www.youtube.com/watch?v=h1NEG0xQI-g&feature=youtu.be

      Knelson Batch - How It Works:  https://www.youtube.com/watch?v=Y02WRGzbt-o

     

    Small scale gold mining - Knudsen bowl gold concentrator: https://www.youtube.com/watch?v=Egik4BPfVX8

    If you notice an error in the Online Mining Guide or with claim information please add in the updated information into the online mining guide to inform other members. Thank You Walter H. Eason
    MARK CHRISTIANSONUser is Offline
    Greenhorn
    Greenhorn
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    10 Oct 2017 09:24 PM
    A good description of the Knudsen bowl concentrator with pictures and the patent number from 1942 can be found at the following location.

    https://riosuerte.com/in-the-beginning-there-was-gold/day-81-placer-gold-recovery-methods-xxi/
    WILLIAM HALLUser is Offline
    Lost Dutchman
    Lost Dutchman
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    12 Oct 2017 05:07 PM
    At least two YouTube vids that explain how the thing works using a cut away Knelson bowl to see what it's doing, as well as other vids on this equipment.
    Love to see one live operations

    Bill
    So much river....So little time....Get out there
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