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Thread: Ultra fine gold dust

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  1. #1
    us
    Mar 2016
    Tahoe, CA
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    Ultra fine gold dust

    Hi all,
    The other day I found a patch of gold in a highbank. I've been sampling to find the parameters. So, I didn't move much dirt. I used a snuffer bottle to grab the tiny -50 mesh I would say and took that plus some of the sands surrounding these pieces from my pan. I am being careful and gentil to recover as small of gold as I can. I went home with only my snuffed material. I then decided to try a process I saw on line that uses one small dish inside a slightly larger dish. Then ran a steady stream on one side of the small dish pushing the black sands out the opposite side like the blue bowl process. To my surprise, it really worked. I would say -100 stayed and only 4 bits of black sand remained. I had about 20 pieces of gold. Then comes the interesting part. I took the bigger of the bowles and tried to swish the black sands around to see if any gold spilled into it. No,not even a tiny speck. Upon setting this bowl down I noticed some material forming a line. It was moving like mud does in water. You know, cloudy swirling color. This material, however, quickly settled into a trough on the bowl. I thought, humm, that looks like it may be golden. I swished it gentlyand was able to get a better defined line. This really looks and acts like gold. It really settles fast and looks like it could be ultra fine gold dust. I have been looking into methods of recovering this tiny pigment like form of gold. Millertables I believe would wash this away. The two bowl method seems to capture it though! I am going to try the two bucket process that uses a whirlpool and a test plug to capture all the gold.
    My question is, if just a tiny bit of black sands can produce a visible amount of gold dust. If this can this be mined to produce some quantity. How would a newbie recover this ultra fine gold dust in s payable quantity? I'm curious as heck. I've accidentally recovered the smallest particles I could ever imagine. I couldn't even tell you how small the mesh of the would be. It moves like smoke in the water before setteling. I literally had one drop of black sands that produced this material. I am proceding with caution. I need advice. Anyone have actual experience mining this? Please, lets not speculate. Experienced miners, please advise. Thanks!
    Aufisher and Jimmydolittle like this.

  2. #2
    Charter Member
    us
    Ed Tracy

    Jan 2015
    Shoreline,wa
    Bounty Hunter
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    Can you post a pic of the material

  3. #3
    us
    Mar 2016
    Tahoe, CA
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    I don't have pics. Once I thought it was gold, I just wanted to protect it and snuffed it back into the bottle. Knowing me I would tip the bowl and loose it! The words do accurately describe it. If it is what I think it is. Would pics really help with my question? I do not want to loose the oppertunity to work with more. I'm going to find out what to do. But for now, I'll try to get more to work with...Thx!

  4. #4
    Charter Member
    us
    Ed Tracy

    Jan 2015
    Shoreline,wa
    Bounty Hunter
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    600 times
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    A picture is worth a thousand words, I and others with a lot of mining experience need to see what you have found.
    Tahoegold likes this.

  5. #5
    us
    Mar 2016
    Tahoe, CA
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    et1955,
    Tomorrow I will get a pic with sunlight. I can understand needing to see exactly what it is. Thank you for responding!

  6. #6
    Charter Member
    us
    Look at the Historical Gold Mining photo albums on my page

    Jan 2013
    Huntington, Or./ Stanton, AZ/ former Outlaw California Gold Dredger
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    Quote Originally Posted by Tahoegold View Post
    Hi all, . How would a newbie recover this ultra fine gold dust in s payable quantity? !
    Mercury... A couple drops of charged mercury in a copper pan is the best way, but mercury... you know...

  7. #7
    us
    Mar 2016
    Tahoe, CA
    Compadre, Gold Racer, White's TRX,Centech,Bazooka Gold Trap 24" Sniper, sluices with God Hog mats, Grizzly Gold Trap Motherload, Determination
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    Thx RL,
    A copper pan? Ok, I'll look into this.I know I need to be careful. I'll study the process. I know someone familiar with doing this. The bigest part of this however, is getting it out of the ground quickly, efficiently. I suppose using classification to get some of the bigger overburden then going as small as 20 mesh all wet process would be the most recovery. I have a bucket inside a bucket classifier that is 1/2" and it does a nice job. I could make a couple others. 1/4" then 20 mesh. Then sluice everything bigger than 20 mesh. I've heard of running a tumbler over night with mercury then processing with acid for mercury recovery and then recovering the mercury with copper strips. All fun to play with but doesn't seem like a real money maker. I suppose I need to start capturing the concentrates and worry about processing later. For now maybe suggestions on mining could help? Pics tomorrow. Thanks again for the advice!

  8. #8
    Make America Great Again

    Apr 2013
    Oregon
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    I have gold like that, I screen to 100 mesh and I can see it building up on the lip of the blue bowl
    you can only see it when it bunches together, I just save all my -100 to run with mercury someday.
    I'd really rather be out getting more than mess with it, I've heard of making a drip leach using a 5 gallon buckets.
    Reed Lukens and Tahoegold like this.
    " A pessimist is an optimist with experience "

  9. #9
    us
    Aug 2004
    Olympia WA
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    Quote Originally Posted by Tahoegold View Post
    I've heard of running a tumbler over night with mercury then processing with acid for mercury recovery and then recovering the mercury with copper strips.
    Um, no... Using a tumbler with mercury is effective on very small quantities, perhaps with the concentrates after careful screening. Using it on a larger scale is another animal... You also have cleanup of equipment and wastewater to consider and you dont use copper strips, you need aluminum.
    Please do not try this until you understand how it works.

  10. #10
    Charter Member
    us
    Look at the Historical Gold Mining photo albums on my page

    Jan 2013
    Huntington, Or./ Stanton, AZ/ former Outlaw California Gold Dredger
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    Unless the mercury is charged beforehand, putting it in a tumbler is basically useless because it will separate into tiny particles.
    Basement Chemistry for the Prospector
    russau, Bonaro, Tahoegold and 1 others like this.

  11. #11
    us
    May 2009
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    Mercury and aluminum are not friends



    Let them play together for a while and you won't have aluminum strips anymore.

    It would be copper that you use.

    If what you describe is gold , you already know how to get it as you've seen it.

    Work on accumulating more of it before you get into advanced fine recovery that can hurt or kill you.

    Until then don't mix aluminum with mercury. It will not get you more gold.
    Last edited by Goldwasher; Jan 22, 2018 at 09:00 AM.

  12. #12
    us
    May 2009
    Sailor Flat, Ca.
    Gold Bug Pro, Gold Bug 2 Burlap, fish oil,
    4,829
    10221 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    Tahoegold likes this.

  13. #13
    us
    Aug 2004
    Olympia WA
    Minelab Xterra 70, Minelab SD 2200d, 2.5", 3", 4"and several Keene 5" production dredges, Knelson Centrifuge, Gold screw automatic panner
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    Quote Originally Posted by Goldwasher View Post
    Mercury and aluminum are not friends



    Let them play together for a while and you won't have aluminum strips anymore.

    It would be copper that you use.

    If what you describe is gold , you already know how to get it as you've seen it.

    Work on accumulating more of it before you get into advanced fine recovery that can hurt or kill you.

    Until then don't mix aluminum with mercury. It will not get you more gold.
    Once you have liberated the HG from amalgam using nitric acid, you will be left with gold and mercuric nitrate Hg(NO3). You can introduce strips of AL foil to this solution and the HNO3 will drop the HG to attack the foil.

  14. #14
    us
    Mar 2016
    Tahoe, CA
    Compadre, Gold Racer, White's TRX,Centech,Bazooka Gold Trap 24" Sniper, sluices with God Hog mats, Grizzly Gold Trap Motherload, Determination
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    Thank you all for your input. I am listening and will not be doing any thing dangerous! I can mine this for now safely. I did some research about mercury recovery. I found out that mercury will actually dissolve gold a little leaving a blackend form of gold. Most folks don't know this black material is gold. Apearantly the smaller the gold the more surface area and the greator amount of dissolving of the gold by the Mercury. This being the case, I'm concerined I may be up against a problem of too much loss or yet another process to recover the blackened gold. Thanks for all the support. I am glad to have the info from you all. The search for the best method continues! Waiting for the sun for pics...

  15. #15
    us
    Mar 2016
    Tahoe, CA
    Compadre, Gold Racer, White's TRX,Centech,Bazooka Gold Trap 24" Sniper, sluices with God Hog mats, Grizzly Gold Trap Motherload, Determination
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    128 times
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    Quote Originally Posted by Reed Lukens View Post
    Mercury... A couple drops of charged mercury in a copper pan is the best way, but mercury... you know...
    I read that charged mercury works great for dirty gold or gold with material which prevents the gold surface from coming into contact with the Mercury. Thank you.
    Reed Lukens and N-Lionberger like this.

 

 
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