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  1. #1
    us
    May 2009
    561
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    All Types Of Treasure Hunting

    Fluidized Bed

    Most here are familiar with fluidized beds used with water but most fluidized beds use air.

    Being that I almost always think out of the box I'm thinking a fb with air could be used in arid locations.

    I'll search youtube & post some videos. In the mean time... any thoughts or comments?
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  2. #2

    May 2012
    675
    223 times
    All Types Of Treasure Hunting
    Quote Originally Posted by nickmarch View Post
    Most here are familiar with fluidized beds used with water but most fluidized beds use air.

    Being that I almost always think out of the box I'm thinking a fb with air could be used in arid locations.

    I'll search youtube & post some videos. In the mean time... any thoughts or comments?
    Yeah, search a bit on "drywasher"

  3. #3
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    Quote Originally Posted by jcazgoldchaser
    Yeah, search a bit on "drywasher"
    There is a big difference between a drywasher & a fluid bed.

    A fluid bed would be a tank or large container such as a drum preferrably with a cone bottom. Air would be pumped in from the bottom just enough to keep everything fluid/moving. The heavier/gold would stay below anything lighter. The lightest flows out the top.

    A lot of material could be processed fast & it would retain a lot of gold that would run off of a dry washer.
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  4. #4

    May 2012
    675
    223 times
    All Types Of Treasure Hunting
    Quote Originally Posted by nickmarch View Post
    There is a big difference between a drywasher & a fluid bed.

    A fluid bed would be a tank or large container such as a drum preferrably with a cone bottom. Air would be pumped in from the bottom just enough to keep everything fluid/moving. The heavier/gold would stay below anything lighter. The lightest flows out the top.

    A lot of material could be processed fast & it would retain a lot of gold that would run off of a dry washer.


    Yep, that's a drywasher.



    Blows air through the material and lets the heavies (gold) settle out.



    You keep the bed thin otherwise you have to increase the air pressure required to maintain the bed.



    The ripple, is like what you're thinking about as a cone. The ripple and bed form a V.



    Slide the material across it so you can continuously process material.

  5. #5
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    I know what a dry washer is. Do you know what a fluid bed is?

    The videos are just to enlighten you.

    The materials are stratified with air instead of water.

    In a fluid bed heavier goes to the bottom.

    With a dry washer heavies are caught in riffles.

    A fluid bed can handle a whole lot more material faster. Surely a lot of fines fall off the end of a dry washer that would stay in a fluid bed.


    Last edited by nickmarch; Oct 10, 2012 at 10:08 AM.
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  6. #6
    us
    Jul 2012
    >GJ Colorado
    43
    1 times
    Prospecting
    Nick. What level of classifying would be needed you think? Also guessing this would require a gas powered forced air option?

  7. #7
    us
    Mar 2012
    California
    Gold Bug Pro, Bounty Hunter Pioneer 505
    101
    41 times
    All Types Of Treasure Hunting
    Honorable Mentions (1)
    I could see something like this being a fun experiment, but one question that comes to mind is how efficient would it be compared to a traditional drywasher.

    Also, while going through some of the Youtube vids, I came across a video of Virgil Hutton using a Garrett gold pan dry.

    It made me think; If you took something like a LeTrap sluice and rigged it up to a jig as a makeshift drywasher, I wonder how well it would work?

  8. #8
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    Quote Originally Posted by John-K View Post
    Nick. What level of classifying would be needed you think? Also guessing this would require a gas powered forced air option?
    I haven't tried it yet but 16 to 20 mesh works best with a liquid fluid bed.

    leaf blower or keene's blower should work.
    Last edited by nickmarch; Oct 16, 2012 at 09:19 AM.
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  9. #9
    us
    Mar 2003
    Redding,Calif.
    3,874
    2141 times
    All Types Of Treasure Hunting
    Drywashers that utilize a constant flow offset elliptical vibrations are a fluidized bed as air supension creates the vortex that makes the gold settle to the bottom. Cone or riffle don't matter as exact same physics apply. I much prefer water powered but not a desert option. This pic is a good ol'Precision fluidized bed concentrator-John
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    Last edited by Hoser John; Oct 16, 2012 at 08:13 AM.

  10. #10
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    Quote Originally Posted by soupfreak View Post
    I could see something like this being a fun experiment, but one question that comes to mind is how efficient would it be compared to a traditional drywasher.
    I think it would be more efficient. It's harder for the gold to get out.

    The air shouldn't be blasting it should be just enough to keep everything stratified. The heavier gold is going to go to the bottom of the tank.
    Last edited by nickmarch; Oct 16, 2012 at 09:18 AM.
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  11. #11
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    A fluidized bed is formed when a quantity of a solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause the solid/fluid mixture to behave as a fluid.


    Fluidization (or fluidisation) is a process similar to liquefaction whereby a granular material is converted from a static solid-like state to a dynamic fluid-like state. This process occurs when a fluid (liquid or gas) is passed up through the granular material.


    Objects with a higher density will sink, whereas an object with a lower density will float.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  12. #12

    May 2012
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    223 times
    All Types Of Treasure Hunting





  13. #13
    us
    Jul 2012
    >GJ Colorado
    43
    1 times
    Prospecting
    Allmineral has some commercial fluid bed and even air based products. I can kind of see with one demo what I think you were talking about with fluid bed ideas a few months back. Would still like to see a viable dry version with more reliable fine recovery.

  14. #14
    us
    May 2009
    561
    42 times
    All Types Of Treasure Hunting
    Jcaz... I'm thinking about trying the solimar device in the middle video. It looks like it would work well with air & with water. One piece of equipment for wet & dry locations!
    Research is more important than detector but Positive Thinking & The Laws of Attraction Rule!
    Think Gold get Gold! Think canslaw get canslaw and other garbage!

  15. #15
    Charter Member
    us
    I can dig it! "WP"

    Mar 2007
    Bounty Hunter's, Whites TM 808, Whites GMT, Suction Dredges, Hand Dredges, Trommels, Gold Vacs, High Bankers, Fluid bed Gold Traps, Gold Pans, Sluices, Dry Washers, Miller Tables, Rp4 Wave table, etc.
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    You guys may find this link interesting: 75 ways to recover gold
    ~Diggin The Adventure~
    Visit My Personal Forum Pages

 

 
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