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  1. #1
    us
    Mar 2009
    21

    micro sluice riffle question

    I've got all of the parts and material to put together a micro-cleanup sluice. I have some regular ribbed rubber matting and some "deep v" rubber matting which just has bigger and deeper grooves.

    What I am trying to figure out is, would it be better to have the small riffles first and then the large in the sluice or the large riffles first and then the small or should I just make two sluice boxes one with small, one with large?

    I will be classifying all of the material and running each separately (8,20,50,100)

    Thanks..


  2. #2

    May 2006
    234
    5 times

    Re: micro sluice riffle question

    Hi there, My advise, since you have the two different size & depth matting, would be to make one of each. Your best bet for running your material is to pre screen it through sieves so that when you put the material down your micro recovery unit the material is all going to be of a iniform size. This will help heaps in your fine gold recovery because then you can just have enough water flow to wash on down the fine material with out needing a stronger flow to wash on through the bigger material. It is the stonger flow needed to wash on through the bigger material that is going to upset the finer material & wash on through the fine gold. The coarser material you can put through the bigger riffeled matting, or just pan it. Pre screening & classifying to a uniform size is the secret to fine gold recovery. It is a slow proccess. You could use a blue bowl.

    Good luck

    JW

  3. #3
    us
    Jun 2010
    233
    160 times

    Re: micro sluice riffle question

    Thats good advice on the sluice, but I think blue bowls are way too slow, and lose gold. Tedious, feed system is a problem.

    I gave my blue bowl away, and my buddy used his for a toilet!

    If you have a fine gold recovery sluice, just run it into a LeTrap pan, and you wont have any BSand to deal with!

    If you want to save the Bsand, and it has gold trapped within it, just roast it, then run it over a slime table or miller table.

    Problem solved!

  4. #4
    us
    Jun 2009
    Blue Ridge, South Carolina
    818
    292 times

    Re: micro sluice riffle question

    Sorry for responding so late to this topic, but you must read this link below if you want great information about making/building a sluice box. These guys already did all the testing and leg work to find out what works and what dont. This should answer all your questions about which one of those to put first, how wide and more. Here's the link:

    http://64.172.168.34/neatstuff/sluice-build-partI.pdf
    http://64.172.168.34/neatstuff/sluice-build-partII.pdf
    http://64.172.168.34/neatstuff/sluice-build-partIII.pdf

    Sample till you find the hot spot, then mine it till its gone! Then start over...

  5. #5
    us
    Jun 2009
    Blue Ridge, South Carolina
    818
    292 times

    Re: micro sluice riffle question

    Yes I have them, how should I send them to you?
    Sample till you find the hot spot, then mine it till its gone! Then start over...

  6. #6

    May 2006
    234
    5 times

    Re: micro sluice riffle question

    Hi guys, The recovery of fine gold is ALWAYS going to be a slow tedious process outside of nasty chemicals or mercury. The secret is in the classifying of the material to a uniform size to start with. Panning it will take for ever & requires a lot of focus & concentration not to mention back braking. Very easy to get impacient with the panning technique due to vatigue & end up losing gold.
    I know what you are talking about with the blue bowl. I shelved mine for quite a while when I got on to mercury but then I have shyed away from that & now love the blue bowl. Again it is just a matter of pre classifying your runs of material. What I like about the blue bowl is that once you have got it set up & running correctly for the material you are running, you can almost walk away & let it do its thing when you have put an amount in to process while you go & make a coffee or grab a beer. It is just a matter of keeping an eye on it while the water does the work. All you will need to do is slight adjustment to the water pressure. No real focus & concentration like if you were panning. With your gold sucker bottle you can just vacuum up the gold particles. The blue bowl, like anything, it is just a matter of really learning how to use it. You cant be impatient when it comes to fine gold recovery or you will lose some or a lot.
    It will save very very fine gold. I know....I have tried many techniques. Any small sluice or ribbed rubber matting set up is still really only a concentrator of the finer heavier materials & you are still going to have to seperate those from the gold. Sure they will trap the bigger particles of gold but when you are getting down to very very small particles of gold you are still going to trap the finer black sands as well. As I said before, saving fine gold is always going to be a slow tedious process outside of chemicals.

    Happy hunting

    JW

  7. #7
    us
    Mar 2003
    Redding,Calif.
    3,933
    2244 times
    All Types Of Treasure Hunting

    Re: micro sluice riffle question

    Used my Dam Industries bowl since 82 when I got my dealership,tried all the rest for many 1,000's a hours in our demo wet processes area and ALWAYS came back to my dam bowl-John

 

 

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