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Thread: Angle?

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  1. #1
    ie
    Nov 2008
    Anaheim Ca and Quartzsite Az
    Minelab SD2200v2/GP4500
    146
    2 times

    Angle?

    What angle do you guys use on the drywashers.
    www.colonywoodscreening.com

  2. #2
    us
    Mar 2009
    21

    Re: Angle?

    Because there are so many variables including but not limited to make and model of dry-washer, whether it is a bellows or blower driven, soil type, soil dryness, size of classification screen, whether you pre-classify etc., it is probably easier to describe what you are looking for on your riffle tray. I use a blower powered gold duster and I have installed tape on the screen to create a dead space before the riffles. Because I am usually in areas with flour gold I will pre-classify before I run material through the dry-washer. What I do is get everything set close to where I think it should be. Classify about a bucket of dirt (not necessarily pay-dirt just dirt to dial in the dry-washer but similar to what you will be running). Start the blower set the throttle and fill the hopper. Wait until the riffle tray is properly loaded and observe. I try to get the smallest decline possible while still maintaining fluid flow. While the material is running through I am able to increase or decrease the angle to fine tune. When everything is dry and classified it should look so fluid that it looks like brown water flowing through a sluice box. If you don't get it the first time then re fill the hopper with the same dirt until it is set.

    That's what I do, others may have different instructions that they have found to work for them.
    Good Luck.

  3. #3
    us
    Sep 2007
    Sal Sagev Adaven
    E-TRAC,,,, SOVEREIGN GT,,,, GP 3500,,,, GB PRO.
    2,925
    24 times
    Metal Detecting

    Re: Angle?

    I'm not sure what youre asking but I use a Keene 151 with a honda motor.
    I'll just follow you with My E-trac, Sov GT,or GoldBug Pro.

  4. #4
    us
    Cptbild

    Oct 2005
    NM/AZ/CA/Co/Utah & P.I. Tx.
    339
    1 times

    Re: Angle?

    As we all know
    The drier the material is, and even in the desert(s) there is always a little moisture
    present in the the soil, the better that the gold will seperate out
    Has anyone come up with a good system to predry it? (an age old problem)
    I have been using an 8' HEATED! modified corrigated trough, to run the soil over, beforeI sent it over the "riffles" !
    It works, but, it's also an extra long! hard! step!
    My "Placer Claim" assays at 1 - 1 1/2 oz of gold, a yard!
    And, it is located in a canyon in the very bottom, aka "the foothills" of, The Bradshaw Mnts
    ANY Help/Ideas ?
    If u'd like, we could build/try your idea out, right there on the claim
    (I've got the time and $$$$)
    50/50
    Cptbild & Bugs

  5. #5
    us
    Mar 2009
    21

    Re: Angle?

    Are you kidding me? I'll be there by tomorrow morning! What works for me is good, thick (like 6mil) visqueen (plastic) from home depot it comes in rolls that open up to 10' x 100'. I just cut a 15-20'x10' piece and pour my pre-classified material on that about 1-2 inches thick. You can see the moisture evaporate by the color change in the dirt. When the top lightens up carefully re-rake with a plastic rake so as not to puncture the plastic. By the time I get enough material classified to do it again the first batch is dry. Just lift one end of the plastic to slide all the dirt to the other end. That should work for you.

  6. #6
    us
    Sep 2007
    Sal Sagev Adaven
    E-TRAC,,,, SOVEREIGN GT,,,, GP 3500,,,, GB PRO.
    2,925
    24 times
    Metal Detecting

    Re: Angle?

    Hi cptbild, I can see your thinking on bringing gold extraction to the next level. You definitely have gold fever. I have been out in the desert when tempt's are 120+. One would think the soil is dry but its not . The moisture you speak of will Not leave by it's self. It is refered to as hygroscopic moisture . About 180 degrees Fahrenheits when the hygroscopic moisture usually becomes unlocked from the soil. A good heat supply is needed to remove this moisture. One of my trips over in AZ I saw a prospester using some sheets of metal with pin hole perforations in them. He would load the sheets metal with about a inch of dirt. He had a propane bottle and a large tour ch like ,the swimming pool builders use to heat PVC pipe. He heated the metal for a while to remove the moisture. I often thought of getting a auto feed conveyor like cookies are baked on at factory's ,to heat the soil and feed the hopper. HH Extractor
    I'll just follow you with My E-trac, Sov GT,or GoldBug Pro.

  7. #7

    May 2005
    St. Louis, missouri
    2,991
    616 times

    Re: Angle?

    i was told by Phil Hontz to set some corrigated sheet metal out and spread your material onto it to dry for the next days run.he even said walk on it to crush it a little. ive only been out to southern New Mexico 2 different times but that seemed to help for me while i was drywashing.

  8. #8
    us
    Jul 2008
    texas
    garrett 2500
    174
    1 times

    Re: Angle?

    a sheet of tin and a campfire works for me
    if it was easy everyone would be doing it

  9. #9

    May 2005
    St. Louis, missouri
    2,991
    616 times

    Re: Angle?

    i was given that suggestion 10 years ago to use corrigated sheet metal to dry out the next days run. plus i spread the material out on the tin and walk on it to help bust it up for the next days run. youll save more fine gold that way!lots of sheet metal!

  10. #10
    us
    Sep 2004
    N.W. Arizona
    ML 3500,Whites GMT,Gold Bug I
    108
    5 times
    All Types Of Treasure Hunting
    Banner Finds (1)

    Re: Angle?

    Quote Originally Posted by Yellow Hammer
    What angle do you guys use on the drywashers.
    I Build custom puffer type (bellows) drywashers and the standard that the old timers used was 30 - 35 degrees,
    I have one model I build modeled after a unit from the 1930's that I converted the drive system from hand crank to 12 volt gearmotor and redesigned the basic structure to incorporate an approximate 22.5 degree slope. Its a real gold getter even the micron size.
    Just remember the flatter the angle the better at catching all shapes of the heavier minerals.

    Hope that helps ya.
    Custom Made Drywashers
    http://olyeller.wordpress.com/
    === "OL YELLER" ===
    20 LBS. 12Volt
    5 Gallon Hopper
    and
    The Mini Sampler
    Contact Frank C. 928-303-8474
    HAPY HUNTN FOLKS

 

 

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