Submersible dredge ???
Welcome guest, is this your first visit?
Member
Discoveries
 
Page 1 of 2 12 LastLast
Results 1 to 15 of 21
Like Tree14Likes

Thread: Submersible dredge ???

« Prev Thread | Next Thread »
  1. #1
    ec
    Jul 2011
    MXT
    28

    Submersible dredge ???

    Has anyone ever used a submersible dredge And how did it perform for you what size was it Thank You for any input

    [url][http://www.keeneeng.com/Merchant2/me..._Code=SST/url]

  2. #2

    May 2005
    St. Louis, missouri
    5,903
    4574 times

    Re: Submersible dredge ???

    my friend from New Zealand (Trev Alty) built one and has pictures/directions on how to build it over on www.goldminers@yahoogroups.com in the photo/files section. i hope it is ok to post this link
    Gelmac likes this.

  3. #3
    us
    Mar 2003
    Redding,Calif.
    5,854
    6699 times
    All Types Of Treasure Hunting

    Re: Submersible dredge ???

    Keene and others have mass produced them for many years. The suction nozzle style has better recovery as it uses the whole hose for classification and the powerjet style blasts the gravels immediately prior to introduction to the classifying tray inside. Problem is with submersibles if tipped left,right,up or down out goes your gold!! AND they back fill immediately from tailings as sittn' on the bottom so you must suspend them RIDGIDLY with steel straps from a floatation devise to prevent side to side loss. So then why use something with bad recovery when ya need to use floatation anyhow,just get a surface dredge and be a much happier wealthier miner-tons a au 2 u 2 -John
    Rdg Sluicer, NeoTokyo and russau like this.

  4. #4
    sd
    Apr 2012
    Sudan
    Minelab X-terra 705 Gold
    296
    87 times
    All Types Of Treasure Hunting
    Well said John that is what I am thinking. Just make some pontoons out of 5 or 15 gallon barrels. Suspend the whole system tightly and off ya go !

  5. #5
    us
    Sniper

    Aug 2012
    Redding
    Eyes - Nokta FORS Gold - Fisher Gold Bug II
    1,803
    1575 times
    Prospecting
    Banner Finds (1)
    Yeah, I don't see too many applications for submersibles other than outfitting them with high volume electric bilge pumps and running completely incognito.
    Someone comes to check you out, all you pop up with is your hookah regulator and say you sniping.
    Of course it would need some bit of camo on it to blend in with the riverbed if not very deep otherwise it will stand out easily.

    A buddy of mine has a massive 6" submersible, no amount within reason of electric bilges and batteries would operate that thing effectively.
    As it is the 4" that I have requires two 4000gph pumps to make it work, another 4000gph pump would make it work GREAT but at a bulk, weight and battery life cost.
    I did make a 3" with a 1000gph 12v overvolted to 19.2v that worked amazingly well.

    But now we are going way off into another topic. lol
    Gelmac likes this.
    Check out my Gold Sniping video's. http://www.youtube.com/CrainRacing

    Head in the water, butt in the air.
    Now I know why ducks do it!
    Underwater Sniper n00b

  6. #6
    us
    **5th Gen

    Apr 2014
    Gold Country - California
    -Keene A52 - Fab2.5 Highbanker - GoldNSand Hand Dredge Garrett AT Pro - Bazooka Gold Trap 30" Prospector - Garrett Ace 250 - Blue Bowl Concentrator
    853
    732 times
    Prospecting
    Quote Originally Posted by NeoTokyo View Post
    Yeah, I don't see too many applications for submersibles other than outfitting them with high volume electric bilge pumps and running completely incognito. Someone comes to check you out, all you pop up with is your hookah regulator and say you sniping. Of course it would need some bit of camo on it to blend in with the riverbed if not very deep otherwise it will stand out easily. A buddy of mine has a massive 6" submersible, no amount within reason of electric bilges and batteries would operate that thing effectively. As it is the 4" that I have requires two 4000gph pumps to make it work, another 4000gph pump would make it work GREAT but at a bulk, weight and battery life cost. I did make a 3" with a 1000gph 12v overvolted to 19.2v that worked amazingly well. But now we are going way off into another topic. lol
    ..and the noise factor..with so much power being produced
    :: 5th Gen Gold Miner ::
    :: You will never come to realize that you were 2" from the best find, you never found ::



    Here to listen much, ask questions and offer assistance

  7. #7
    us
    Feb 2012
    Prather CA
    Whites GMT
    2,807
    3351 times
    Finding GOLD
    "The most inspiring thing about gold, is not the value, but under magnification, the true beauty of each piece. They are truly like snowflakes that never melt." Oakview2 Fly EAGLE Fly......

  8. #8
    sd
    Apr 2012
    Sudan
    Minelab X-terra 705 Gold
    296
    87 times
    All Types Of Treasure Hunting
    Quote Originally Posted by NeoTokyo View Post
    Yeah, I don't see too many applications for submersibles other than outfitting them with high volume electric bilge pumps and running completely incognito.
    Someone comes to check you out, all you pop up with is your hookah regulator and say you sniping.
    Of course it would need some bit of camo on it to blend in with the riverbed if not very deep otherwise it will stand out easily.

    A buddy of mine has a massive 6" submersible, no amount within reason of electric bilges and batteries would operate that thing effectively.
    As it is the 4" that I have requires two 4000gph pumps to make it work, another 4000gph pump would make it work GREAT but at a bulk, weight and battery life cost.
    I did make a 3" with a 1000gph 12v overvolted to 19.2v that worked amazingly well.

    But now we are going way off into another topic. lol
    What type of your buddy's subbie of dredge? is it the Suitcase dredge as mentioned by Russau ?

  9. #9
    us
    Sniper

    Aug 2012
    Redding
    Eyes - Nokta FORS Gold - Fisher Gold Bug II
    1,803
    1575 times
    Prospecting
    Banner Finds (1)
    TGP: The Sound is just a hum under water and the rocks going through the nozzle.

    Gelmac: This is what it looks like.
    Click image for larger version. 

Name:	underwater dredge.jpg 
Views:	628 
Size:	10.8 KB 
ID:	1089530
    Check out my Gold Sniping video's. http://www.youtube.com/CrainRacing

    Head in the water, butt in the air.
    Now I know why ducks do it!
    Underwater Sniper n00b

  10. #10
    us
    Mar 2003
    Redding,Calif.
    5,854
    6699 times
    All Types Of Treasure Hunting
    Absolute worst dredge ever made-look at discharge-blocked withing 5 minutes as sitting inches from the bottom. Now the front style suction nozzle mixes all the gravels sucked up immediately to that MINISCULE box with lousy recovery. Suction nozzle needs to be at least 10' from the box but no fix for that insipid recovery system. A few degrees off left/right and viola recovery box dumps out. Good to blow off overburden and that's about it. John
    NeoTokyo and Gelmac like this.

  11. #11
    Make America Great Again

    Apr 2013
    Oregon
    1,649
    3791 times
    All Types Of Treasure Hunting
    (EDIT) oh... didn't see this was an old thread... anyway...

    heres one I saw a few years ago from Steve Herschbach
    Name:  jp000905.jpg
Views: 2344
Size:  12.8 KBName:  jp000906.jpg
Views: 1820
Size:  13.5 KB

    ” SUBSURFACE DREDGE ( SUCTION NOZZLE )

    PART # ITEM
    KESS4 4” SUBSURFACE TUBE
    KEPF25 2 – 2” FLOATS
    KESN42 4” X 2” SUCTION NOZZLE
    KEP103BH 4HP HONDA PUMP W/BASE PLATE
    OPTION - KEP103BCH 4HP PUMP W/T80 AIR COMPRESSOR
    KESH4 15ft. 4” SUCTION HOSE
    KEPH2 16ft. 2” PRESSURE HOSE
    KESS72 4 – 4” HOSE CLAMPS
    BJRB200125 2” X 1” REDUCER
    KUPHC2F 2” PRESSURE HOSE COUPLER
    KUSH15 4ft. 1” SUCTION HOSE
    KESS24 4 – 1” HOSE CLAMPS
    KESS32 4 – 2” HOSE CLAMPS
    PANMM 6” MINERS MOSS
    KEFV20 2” FOOTVALVE

    NOTE: Frame is not included in this price because you will need to build your own. Tubing can be bought from Greer Tank. You will need 20ft. of 1” square aluminum tubing. See picture for simple frame assembly.

    Two items of importance. First, I opted for a suction nozzle design as I wanted to allow the gold to settle before it gets to the box and to reduce the chance of the riffles being "blown out" should the prime be lost in the main suction hose. An alternative would be to use a 4" power jet mounted directly to the tube, which is how Keene normally did it.

    Second, since I used a suction nozzle, I cut the tube opening into the box back far enough to insert the 4" hose into the tube and clamped it down. This shortened the overall length and eliminated a clog point.

    Thye entire unit weighs and costs about the same as a 2.5" surface dredge. It burns the amount of gas a 2.5" dredge would, saving more costs and weight.

    Recovery issues with a subsurface are simple. The riffle is small, and must be open to capture gold. If you hog material, you will bury the riffle, and lose more gold. If you are getting into gold, check the riffles to make sure they are clearing properly, and then slow up on cramming material through the unit.

    These are great unit for hit and run operations where you have coarse gold. If all you have is fine, flaky gold losses may be prohibitive. The longer term the operation, the more gold will be lost over time. For longer term, relatively stationary dredging operations, use a surface type dredge instead.
    Last edited by winners58; Dec 09, 2014 at 03:46 AM.
    ratled likes this.

  12. #12
    us
    Jan 2012
    California
    256
    460 times
    Prospecting
    Heed the words of Hoser, he wasn't given that name, he earned it!

  13. #13
    us
    Sniper

    Aug 2012
    Redding
    Eyes - Nokta FORS Gold - Fisher Gold Bug II
    1,803
    1575 times
    Prospecting
    Banner Finds (1)
    Yup, I agree, recovery is NOT the best with this unit, thus why I would only ever run it in an electric design.
    There are much better alternatives.

    Now what I have come up with to improve upon the design is to grab some GoldHog mat and line it from the front of the jet to the box.
    It will help increase recovery but it is still not the best option.
    Check out my Gold Sniping video's. http://www.youtube.com/CrainRacing

    Head in the water, butt in the air.
    Now I know why ducks do it!
    Underwater Sniper n00b

  14. #14
    sd
    Apr 2012
    Sudan
    Minelab X-terra 705 Gold
    296
    87 times
    All Types Of Treasure Hunting
    I think Glen Oates has used a screening method with the subbies that is good also on improving recovery.

  15. #15
    sd
    Apr 2012
    Sudan
    Minelab X-terra 705 Gold
    296
    87 times
    All Types Of Treasure Hunting
    Glen Oates also known as " micropedes1" has used the Suitcase dredge a (8 inch) to " move a sandbar and save as much gold from the sand as possible. He used a suction nozzle to allow stratification along the hose. The sand spilled on to a slick spreader plate, followed by a 80 mesh profile screen. " He describes his use over on the "Goldminers" on yahoo groups.

    What I learned that a submersible - I am talking specifically about the Suitcase dredge here- is used by some dredgers to remove overburden as it is quite effective in that task. Improving fine gold recovery on a Suitcase dredge requires a bit of add-ons and screening system or a way to hide the gold out of the bigger cobbles and gravel or it will be scored out the end.
    As it does not have a pre-screening area to classify , unlike the surface dredges. There is an area of improvements here that requires further investigation.

 

 
Page 1 of 2 12 LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

build your own submersible dredge
,
how to build a submersible dredge
,

keene submersible dredge

,
submersable dredge
,

submersible dredge

,
submersible dredge electric
,

submersible gold dredge

,
submersiible dredge
,
trev alty
,
used submersible gold dredge
Click on a term to search for related topics.
Powered by vBadvanced CMPS v4.3.0