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Thread: Super concentration before panning, miller table or blue bowl recovery of fine gold

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  1. #1
    us
    May 2014
    AZ
    Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and /home made fluid bed and stream sluices.
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    Super concentration before panning, miller table or blue bowl recovery of fine gold

    Here is a way to greatly reduce the volume of your pre-classified concentrates (super concentrate them) before you begin to process them by panning, etc. by using a large funnel*, rubber cork, eye screw, length of wire and a short section of pvc pipe.

    Procedure:

    Insert the cork, attached to a piece of stiff wire, into the top of the neck of the funnel. Make sure there is room to form a small chamber in the neck below the natural slant of the funnel main wall.

    Add concentrates (avoid overloading) and water (as much as your funnel can hold) and swirl the funnel to allow the gold to seek the bottom in the slurry. When you stop the gold and other heavies will be the first to settle and most if not all of it into the chamber or centered above it. Closely classified feed pretty much assures this.

    Hold level and allow time for the water to stop spinning then thread the wire through the pipe**. Note: It is easier to do this and the previous step if you drill a hole in a board and place it on a catch container. Stir it to a vortex with whatever you choose.

    Kind of ratchet the pipe and bore straight down until it bottoms out on the main funnel wall. At this time the pipe will likely be held loosely in place by the surrounding cons and water.

    Hold the pipe in place and pull the cork out with the wire to let the "core" (super concentrated material in the pipe) drain into a tall sided container to avoid splashing and overflow. Flush the pipe with water if it did not fully drain...it should. At this point you will have reduced the total amount of concentrates to process by up to about 75% or more.


    The tails (what is left in the funnel surrounding the pipe) are almost surely barren of gold but save it to reprocess later just in case you don't trust the method.

    If your starting point is with a large amount of concentrates (bucket or buckets)*** then you will end up with a still overly large amount of super concentrates that can be further reduced by repeating the process with them. Also you can re-process your tails just to be sure you got it all.

    Heavy pans!


    * One with vertical sides above the cone is best.
    ** The pipe opening should be larger than the funnel neck and it should be beveled to create a tight flat fit against the main funnel wall!
    *** Use a large funnel. Here is a 10" funnel that I am using. Got it at a local home brew/wine making store. https://www.homebrewing.org/10-Funne...hoC7WwQAvD_BwE
    Last edited by arizau; Nov 02, 2018 at 06:01 PM.
    Oddjob, Duckshot and DizzyDigger like this.
    If it can't be grown, it must be mined!

  2. #2

    May 2005
    St. Louis, missouri
    5,740
    4304 times
    Thanks for the post / idea ! But maybe a picture of your finished device might help those of us that need that extra push !
    Gravelwasher likes this.

  3. #3

    Aug 2012
    RD1000, GSSI Profiler EMP-400. GPZ 14 & 19
    4,257
    8693 times
    This much details explained with a MacGyver styled beer funnel; OK, got me interested for sure.

    Any pictures,
    Duckshot likes this.
    Quote Originally Posted by G.I.B. View Post
    I'm not an Idiot Whisperer. I can't help you any further with the math.

  4. #4
    us
    May 2014
    AZ
    Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and /home made fluid bed and stream sluices.
    1,866
    2695 times
    Prospecting
    No pics...I have repurposed the funnel into another "MacGyver'ed" device for more or less the same purpose but now as a primary concentrator for fairly large volumes of gold bearing ocean beach sand. Still to be finished and tested but I will post pics if it works.
    russau and wildminer like this.
    If it can't be grown, it must be mined!

  5. #5
    RTR
    RTR is online now
    us
    Roger

    Nov 2017
    Smith Mt. Lake Va.
    Teknetics Liberator Falcon MD-20
    2,425
    7840 times
    All Types Of Treasure Hunting
    Miller table fast easy & no junk ,minus 40 mesh Click image for larger version. 

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    And idiot proof Click image for larger version. 

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    Last edited by RTR; Dec 24, 2018 at 12:23 PM.

  6. #6
    us
    Author of a book about finding gold in Colorado

    Jan 2012
    Summit County, Colorado
    Grizzly Goldtrap Explorer & Motherlode, Gold Cube with Banker on top, Bazooka Goldtrap sluices, Angus Mackirk Expedition, Gold-n-Sand Xtream Hand pump
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    10241 times
    Prospecting
    Thatís still pretty big gold there (your -40), show me the -100 or -125 and Iíll be Impressed.
    wildminer likes this.

  7. #7
    RTR
    RTR is online now
    us
    Roger

    Nov 2017
    Smith Mt. Lake Va.
    Teknetics Liberator Falcon MD-20
    2,425
    7840 times
    All Types Of Treasure Hunting
    Quote Originally Posted by KevinInColorado View Post
    That’s still pretty big gold there (your -40), show me the -100 or -125 and I’ll be Impressed.
    You asked.Minus 100 under magnification "pin head" and smaller Click image for larger version. 

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    - 100 mesh,maybe a thousand of them NO problem for the Miller Click image for larger version. 

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    Last edited by RTR; Dec 26, 2018 at 08:09 AM.
    wildminer and KevinInColorado like this.

  8. #8
    RTR
    RTR is online now
    us
    Roger

    Nov 2017
    Smith Mt. Lake Va.
    Teknetics Liberator Falcon MD-20
    2,425
    7840 times
    All Types Of Treasure Hunting
    Minus 125 on the Miller.Holding steady in place w/water flowing over them Click image for larger version. 

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    So small that w/o jet-dry they float when placed in a vial of waterClick image for larger version. 

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    Last edited by RTR; Dec 26, 2018 at 08:36 AM.

  9. #9
    us
    Author of a book about finding gold in Colorado

    Jan 2012
    Summit County, Colorado
    Grizzly Goldtrap Explorer & Motherlode, Gold Cube with Banker on top, Bazooka Goldtrap sluices, Angus Mackirk Expedition, Gold-n-Sand Xtream Hand pump
    6,639
    10241 times
    Prospecting
    Thatís the stuff!
    agolddigger likes this.

  10. #10
    us
    May 2014
    AZ
    Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and /home made fluid bed and stream sluices.
    1,866
    2695 times
    Prospecting
    Quote Originally Posted by arizau View Post
    No pics...I have repurposed the funnel into another "MacGyver'ed" device for more or less the same purpose but now as a primary concentrator for fairly large volumes of gold bearing ocean beach sand. Still to be finished and tested but I will post pics if it works.
    Re the above...My current project is for processing ocean beach sands for gold concentration. Typical beach sand is usually at or below 100 mesh and so is the gold.

    I affixed a plugged 10" funnel into a bottomless 5 gallon bucket making it into a small cone tank. I drilled a hole near the bottom of the funnel cone and pump water through it horizontally around the side to create circular flow similar to stirring it with a paddle creating a vortex of a sort to keep sand feed in a slurry so that gold has a chance to settle in the dense slurry. Feeding will be metered through another funnel to the center of the container exiting fairly deep in the slurry. Preliminary testing is positive that gold (hopefully most or all (?) settles through the rotating slurry to a level with or below where the water is injected thus the gold is protected and concentrated. I am in hopes that waste sands can be cycled out of the tank via an overflow hole above the anticipated gold concentration zone to make it a continuous operation allowing constant feeding. The slurry load has to stay fairly minimal, about a pan full or less, otherwise the sheer weight of it will slow or stop the rotation of it and not allow the gold to settle through it.* Final concentrates can either be drained or washed out of the container at the end of the day. Only testing will tell...more later.

    *I'm using an 800gph pump but a higher capacity pump may be in the offing to facilitate a higher slurry load/feed rate.
    Last edited by arizau; Jan 07, 2019 at 03:24 PM.
    If it can't be grown, it must be mined!

  11. #11
    Charter Member

    Sep 2014
    Midwest, North of 36į60'
    2,567
    3529 times
    All Types Of Treasure Hunting
    Ok! I think I am on to you Arizau. I think I screwed around with the same concept which I learned from a you tube video.

    If you take a five gallon bucket, place a gallon of concentrates into it, give some rapid swirling with a stick. When you swirl it all the material that is denser than water will migrate to the outside bottom of your bucket. Then let it settle, the densest material will be the first thing to stop swirling. When it starts to slow down the gold will concentrate itself in the center of the bottom of the bucket.

    Now for only the trick part of the magic trick- getting the center bottom of the bucket out without disturbing the rest of the pile.

    The best I came up with, though I have not built it, is a shallow removable cup, maybe about 2"-3" in diameter, that screws under a hole center bottom of my 5 gallon bucket. Swirl, let it stop, slide a piece of sheet metal under the pile to separate the wanted from the unwanted and keep the unwanted dirt and water in the bucket, then unscrew the cup and pan its contents.
    Last edited by Duckshot; Jan 07, 2019 at 08:13 PM.
    arizau and mytimetoshine like this.
    "There can be no self-government without self-discipline. There can be no self-government without self-control. There can be no liberty unless it is grounded in moral discipline and the ability to do what is right." ~ Dr. Alan Keyes

    Liberty is the freedom to carry out God's will. In God We Trust.

  12. #12
    us
    May 2014
    AZ
    Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and /home made fluid bed and stream sluices.
    1,866
    2695 times
    Prospecting
    Quote Originally Posted by Duckshot View Post
    Ok! I think I am on to you Arizau. I think I screwed around with the same concept which I learned from a you tube video.

    If you take a five gallon bucket, place a gallon of concentrates into it, give some rapid swirling with a stick. When you swirl it all the material that is denser than water will migrate to the outside bottom of your bucket. Then let it settle, the densest material will be the first thing to stop swirling. When it starts to slow down the gold will concentrate itself in the center of the bottom of the bucket.

    Now for only the trick part of the magic trick- getting the center bottom of the bucket out without disturbing the rest of the pile.

    The best I came up with, though I have not built it, is a shallow removable cup, maybe about 2"-3" in diameter, that screws under a hole center bottom of my 5 gallon bucket. Swirl, let it stop, slide a piece of sheet metal under the pile to separate the wanted from the unwanted and keep the unwanted dirt and water in the bucket, then unscrew the cup and pan its contents.
    The video you saw is here and his collection is easy. Two Bucket method?
    Duckshot likes this.
    If it can't be grown, it must be mined!

 

 

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