Jump to content
Sign in to follow this  
Steve Herschbach

Everything Your Ever Wanted To Know About Gold Pans

Recommended Posts

I tripped over this extensive article, available as a free download. Here is the abstract:

The article sets out to clarify the special character of the North American gold pan and why it remains so popular – in spite of widespread dissatisfaction and many modifications and innovations. The North American pan is distinctive in being circular with a flattish floor ringed by an outwardly sloping wall. Its identity is confused by over-use of the terms 'pan' and 'panning'. The North American pan gyrates in a distinctive orbital motion driven by both hands of the panner. Although many other motions are resorted to (tapping, to-and-fro, tilting, and tick-tock), it is the orbital motion and flattish floor that together distinguish the pan from most other hand-held gravitational devices. In spite of its enduring popularity, no scientific tests have been published on the North American gold pan or for any of the innovations covered by 30 US patents awarded since 1861. It remains unclear if the North American gold pan is more efficient at recovering fine gold and flat gold than is a lotok, batea, dulang, ninja bowl, grizzly pan, mat, bucket or any other sort of hand-driven gravitational device. Some innovations are long-forgotten but merit attention. For instance, bars to keep the panners hand clear of the water, cables to hold large heavy pans, and several pans designed for panning without any water. Traditionally the North American gold pan was a combined digging and washing device, but today most models are not designed for digging and require a spade to be used. 

Gold recovery in Gold Pans -the term... (PDF Download Available). Available from: https://www.researchgate.net/publication/313562132_Gold_recovery_in_Gold_Pans_-the_term_'Panning'

 

  • Like 7

Share this post


Link to post
Share on other sites

That's a really cool read, thanks for putting that up.  However my favorite pan isn't on there..

5086-blu_1.jpg

Share this post


Link to post
Share on other sites

More than I ever want to know....

  • Haha 1

Share this post


Link to post
Share on other sites

Great writeup! But, I've got a new wrinkle on a gold pan....my automatic panning machine AKA "Sweep Jig". Utilizes a flexible bottom, or diaphragm. I've been working on this since August of '16. Patent has been applied for. You can see the old prototype running here:Sweep Jig at Bonanza Bar

Works well, even without water.

Jim

P5130001.JPG

P5130003.JPG

P5130002.JPG

  • Thanks 1

Share this post


Link to post
Share on other sites

People are always trying to reinvent the wheel when it comes to gold pans & make a bit of coin. Talking of wheels, I have used an old car hubcap as a gold pan & even a frying pan. Seemed to work just as well as any gold pan. Talking of pans, my favourite pan is the large Garrett super sluice gravity trap pan. A couple of good deep aggressive riffles that do the job quickly & efficiently. Once material is down to the business end of proceedings, black sand & the goodies, 

20180817_070913

 just spin it around to the smooth side. 

Crevice sucker 001

 

operating sluice box 020

 

operating sluice box 021

 

operating sluice box 022

Cheers

Good luck out there

JW :smile:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Similar Content

    • By M1dn1ghtN1nj4
      So, after playing around with a few ideas, I figure it's time to go ahead and make a larger scale sluice.  No tiny 95GPH flow, this is going to be 500GPH.  That's just over 5 times as powerful as my previous "pocket sluice".  This is basically a small Gold Cube.  Half the width, and scaled down in some areas.  This one is designed to take real gold sluice rubber matting.  I bought two types, one is generic "High-Low" matting that's 2.3mm tall.  The other is "Vortex" matting, and it's 7mm tall.
      The trays I have are designed to print with minimal supports and material, hence the honeycomb grid.  There is a little angular lip at the top of the matting area that keeps the top of the mat in place, and places the water and material flow completely onto the mat.  The little pegs at the bottom keep the mat from sliding down, and and small enough to not impede water flow in any meaningful capacity.  The underflow section at the top is actually the exact same dimensionally as the Gold Cube, so that the water flow works correctly.  Under the foot where the underflow is, is a cutout that fits into the raised pegs at the top of the bottom end, so they can stack neatly.  There is only 0.3mm of play between the parts, so that it's a nice, tight fit.
      The top tray, or "slick plate" is the same general idea, and has a 9 degree angle, just like the matting tray.  The red lid slides into the slot around the top, and creates a tight sealed box that directs the water flow.  It has only 0.3mm of clearance.  The back of it will end up having a threaded tube, 3/4" to allow a bilge pump to be hooked up to it.  What's not pictured here is an additional piece that directs water flow down to prevent excess splashing and uneven output.


    • By tboykin
      I found some good gold in clay. Sticky, greasy stuff but shows promise. So I ask you old sourdoughs, what is the best way to process this material? I have been smooshing it by hand and then panning but it's not very efficient!
    • By Creekboy
      This is a 3D printed blue bowl version 1, it worked amazing for doing my last big clean up and sucked the sand away very quickly. I didn’t want to pay an arm and a leg so I built my own, leave an e-mail if you want the file. The whole project cost me less than 30 bucks or so. 
      Parts:
      -172 GPH Pump 
      -3/8 Tubing 
      -On/Off Valve 
      -12  #10-24x1in Screws 
      -9 #10 Washers 
      -Rectangle Tub 
      -Small Bucket 
      -Printed Parts 
       
       


    • By M1dn1ghtN1nj4
      Well, as far as I can tell, it's the smallest FUNCTIONAL sluice box.  This isn't a cute scale model to look like a neat paperweight.  This thing actually WORKS!  Let me know what you think!  This has taken me well over 4 months to develop past where you saw it last time.  I still have a few minor tweaks I want to do to it, but all in good time.
       
      As long as you can spoon feed it small enough material, this will work for you.  I guess this would be more suitable for processing concentrates, but it should still be a hefty worker!
       
      Features:
      * Self-contained power (4x AA rechargeable batteries @ 1350mAh each)
      * 3x 120 LPH micro pumps @ 6volts each
      * Self-recycling water system
      * Can be used as a single or double tier system
      * Sluice trays are set at 8 degrees
      * Removable riffled drop-ins (currently printed in green) (upgradeable/swappable)
      * Debris catch bin for removing excess material from the basin
      * Scotchbrite scouring pad used as a particulate filter to prevent pump clogging
      * Fully disassembles and packs into itself for painless transportation
      * Watertight, isolated battery compartment won't get wet from splashes or overflow
      * Drain holes to prevent water buildup around solder connections to pumps, and in storage area
      * Spare storage area can be used for rubber mats, vials, filters, etc
      * Riffled trays (3D printed) designed for use in this system with its specific flow rate/angle
      * Quickly comes apart for cleaning of the trays or storage
      * Currently takes 687.52 grams of PLA filament @ 1.75mm  (52 hours to print on my settings)
       
      Things I want to improve in my next version:
      * Isolate the pumps better so they don't suck up material or silt
      * Raise the edges to allow it to process larger piles of material without spilling over the sides of the trays
      * Make a better trap to catch the waste material, rather than let it build up in the main basin
      * Design riffle drop-ins that are more easily removable
      * Possibly design different types of riffle drop-ins
       
       
      This one was just before this 2-tier version, when it was at a single level.
        Check out this point in the video, where a pretty good size nugget shows up!
       
       
    • By Creekboy
      Just finished this project, figured somebody might like it around here. 


    • By GB_Amateur
      My sister ran into a fossiker when out camping who was having an issue with tiny shot while finish panning.  He was sucking the shot into his snuffer bottle when trying to collect the gold.  Any suggestions?  I have a feeling he's not the first person to be annoyed by this.
×