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accentcl
04:19:07 Thu
Oct 7 2010

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Help with testing dry placer

I have a dry placer that I want to do some bulk sampling on. I am in the process of building a screen-wash plant that will do about 10 yards per hour. There is no water there, so I need to recirculate the water and separate the solids out. The material is mostly sand. How is the best way to do that? Thanks.

  
Geo_Jim
04:38:32 Thu
Oct 7 2010

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Re: Help with testing dry placer

Hmmm, well you could start with a de-watering screw which is an auger which separates out the sand and leaves water. Then you could sieve the finer sands with a screen shaker.
Geo Jim

  
leonard
11:53:40 Thu
Oct 7 2010

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Re: Help with testing dry placer

If you want to build your own, here's a bunch of pictures of some a friend was building. They are all sold now but you can see how these were built.

http://golddredger.com//details/dewatering.htm

Leonard

  
kringle_mining
15:33:24 Thu
Oct 7 2010

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Re: Help with testing dry placer

Are you in Arizona
or in the high country of Alaska
Can you post some pictures of the terrain..thank?
Bilbo

  
accentcl
17:49:20 Thu
Oct 7 2010

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Re: Help with testing dry placer

It's actually in Utah. Here is a photo of the equipment that was being used in the area until gold went under $300 an ounce and they pulled out.
[1 edits; Last edit by accentcl at 17:51:09 Thu Oct 7 2010]

  
accentcl
17:54:42 Sat
Oct 9 2010

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Re: Help with testing dry placer

Thanks for all the helpful info. I think the de-watering screw is perhaps beyond my meager fabrication skills, but the continuous operation would be nice. Any ideas on an easy to build one?

I have also thought of a series of settling tanks.

The dry system is intriguing. I will have to do some research on that.

Any and all ideas are welcome.
Thanks everyone.

P.S. Did I mention the gold is very fine?
[3 edits; Last edit by accentcl at 18:11:00 Sat Oct 9 2010]

  

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