Lost Password :: Posting Pictures :: Who's Online :: Stats :: Memberlist :: Top Posters :: Search
:: :: How much material?
Unsubscribe From Newsletter



Welcome, Register :: Log In Welcome to our newest member, Agent67.
Users active in this forum:
Users active in this thread: Guest

1 people online in the last 1 minutes - 0 members, 0 anon and 1 guests. (Most ever was 29 at 13:36:32 Sat Aug 3 2002)

Pages: [ 1 ]

[ Notify of replies made to this post ][ Print ][ Send To Friend ] [ Watch ] [ < ] [ Add Reply ] [ > ]

canyoncityraised
19:46:19 Sun
Jul 19 2009

Offline
22 posts
Reply
How much material?

So I've just started mining a bit this season, and have yet to get my homemade riffles dialed in. I'm holding too much material in the sluice that should be cleaning out. I have a couple things yet to try (more incline, flip moss over, adjust pitch of riffles, add more expanded, etc.). My sluice is bedded with miners moss over some kind of spongy, criss-cross (like burlap) non-skid shelf paper. 1ft x 3ft

On such a sluice, how much 1/4 in. screened material should I be able to run between clean-ups? Answers measured in 5 gal. buckets would be apreciated.

  
nuggets
20:18:54 Sun
Jul 19 2009

Offline
71 posts
Reply
Re: How much material?

can you post a piccy of the amount of water flowing through your sluice ???:confused:

  
canyoncityraised
20:43:56 Sun
Jul 19 2009

Offline
22 posts
Reply
Re: How much material?

water is about 2 1/2 inches deep... I've seen what one should look like running right, and know the things I need to try to change untill mine looks right. I'm just curious how much material you other guys running stream robber's and highbankers would expect to run on a sluice of that size between clean ups... If I'm never able to run 6 buckets, maybe it's because I should only expect to run 3.

But yeah, I'm making some mod's today, heading out tomorrow, hopefully I'll get it dialed in and post some pics... after all, what fun is building something cool and not showin' it off a bit.:smile:
[1 edits; Last edit by canyoncityraised at 20:57:17 Sun Jul 19 2009]

  
Geo_Jim
04:26:09 Mon
Jul 20 2009

Offline
1241 posts

Reply
Re: How much material?

I read somewhere that you should be able to see a surface expression of the riffles in the water. So you should be able to see waves or actually higher water over each riffle.

I hope this helps.
Geo Jim

  
8oznugget
04:50:12 Mon
Jul 20 2009

Offline
249 posts
Reply
Re: How much material?

You should be able to run material through your box indefinately, until it becomes laden with too much gold, or black sands and heavies. If the pitch is too shallow, the feed water too slow, the riffles are too close together, or the material is fed too fast, these can cause the box to not clean out properly. If everything is set up proper, you should be able to see the material behind the riffles dancing as the fed material clears the feed area and the first few riffles.
Good luck
8oz

  
DanAK
07:46:59 Mon
Jul 20 2009

Offline
376 posts

Reply
Re: How much material?

I am in an area with lots of black sand, I have run 3 yards (50-60 buckets per yard) across an A-52 sluice (10" wide sluice) it was still processing material but starting to load up and we were froze, so cleaned up.
My currant sluice is 20" wide with expanded and low water riffles, I run about an inch of water in it, and have ran as much as 40 yards between cleanups, at aprox. 7 to 10 yards per hour. looking like I may cut cleanups down to once per day as I get this thing dialed in.
Hope this helps, good luck, Dan

  
canyoncityraised
04:07:03 Wed
Jul 22 2009

Offline
22 posts
Reply
Re: How much material?

Thanks a bunch guys that did give me some more things to look for.

Well, it aint pretty but it worked much better this time out.
http://i621.photobucket.com/albums/tt298/myname78_photos/001.jpg

http://i621.photobucket.com/albums/tt298/myname78_photos/003.jpg

I lowered the riffle angles (built adjustable)
Flipped miners moss to tight side up
Ran w/more drop
Needed less water to stay clean (about 1 1/2 inch now)

It cleaned out well, even if I over-loaded it, and held onto the fine gold wich was my goal from the get-go. The last riffle plugs up pretty fast with black sand, but with another foot of expanded mesh following it seems to work o.k. After a good 10 minutes running clear there's hardly any "junk" left on top and I'm a happy camper.

Here it is dry:
http://i621.photobucket.com/albums/tt298/myname78_photos/006.jpg

Thanks again for the help guys.

  
canyoncityraised
04:11:43 Wed
Jul 22 2009

Offline
22 posts
Reply
Re: How much material?

Sorry, tried to show the pic's in post... oh well.

In case you were curious, yes the miners moss was by far the most expensive part:smile:

  
popandsonminers
20:33:58 Wed
Jul 22 2009

Offline
418 posts
Reply
Re: How much material?

Nice DIY sluice!

For the expanded metal portion, try 3-4 feet per second of water velocity. In high-banker mode, that would be ~1/2" deep water at 1-1/2" slope per foot of length. For a stream sluice, depth of water and slope can be varied to attain 3-4' per second. From you description of getting loaded up, I'm guessing your velocity is too slow. 3-4' per second looks fast to some, but your expanded will catch gold so small you can hardly see it.

I can't tell from the pictures, but it looks like ~1/2" expanded metal? That's a good size. Raised expanded is better than flat expanded: better vortices. Your feed should be slow enough that you can always see most of the outline of the expanded diamonds thru the blacksand as this will assure that the black sand is dancing in the diamonds (fluidized, allowing the gold to sink and be captured and black sand to flush thru). The lighter material will just bounce/flush right over the expanded.

At 3-4' per second, you can feed at what seems to be an astounding rate. If it's stream gravel, no more than a minute for a 5 gallon bucket. Move more material, get more gold. But it will still be far less than the commercial operations (Clarkson studies) that use expanded metal and get a high percetntage of gold to 100-150 mesh.

There should be no sandbars on your expanded metal, or the gold has no where to go and will just kite right out the back. You can run material without cleaning up until you see little piles of gold in the diamonds. When that happens, celebrate, take a picture and post it here.

You can see what I'm talking about in the clean-up sluice on our YouTube segment:

http://www.youtube.com/watch?v=0jXGbp8KJAo

Best of luck to you.


  
canyoncityraised
01:46:20 Fri
Jul 24 2009

Offline
22 posts
Reply
Re: How much material?

Thanks P&S, it sounds like I may need to run even steeper w/less water. I belive that expanded is raised 3/16... it's just rain gutter cover from home depot. I was wanting to emulate your design of graduated sizes of expanded, only adding a couple riffles above it, but I haven't found a good local source for the raised expanded without spending an arm and a leg. I'll keep working. Thanks again for the pointers.

  

Pages: [ 1 ]

[ Notify of replies made to this post ][ Print ][ Send To Friend ] [ Watch ] [ < ] [ Add Reply ] [ > ]

 Total Members: 11956

  • Can start a new thread. (Everyone)
  • Can't start a new poll. (Mods & Admins)
  • Can add a reply. (Everyone)
  • Can't edit your posts.(Everyone Registered)
  • Register :: Log In :: Administrators

    The time is now 21:15:58 Wed Dec 8 2021

    Powered By BbBoard V1.4.2
    © 2001-2007 BbBoy.net
    :: :: How much material?

    [Most Recent Quotes from www.kitco.com]

    [Most Recent Quotes from www.kitco.com]