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JOE_S_INDY
18:16:51 Sat
Oct 24 2009

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After Action Report - US Prospectors S-1 Concentrator

The S-1 Concentrator

The Concentrator is made of the same black material as the G-1 Highbanker which means that it is tough, heavy duty, light and very wear resistant.

The low end of the S-1 is intended to rest on a Lowes' mortar tub's side, above the recirculating water supply. A gold pan is sunk under the discharge to contain the spent concentrates. A 12 VDC bilge pump provides water to both the concentrator as well as a small supply to the self feeder. The water was treated with Jet Dry. The used car battery we used provided months of service on a full charge.

Once again, Joel's written instructions were easy to follow. The concentrator can be run slowly (for a one time run-through) or faster (for two runs). The rate of feed was the determining factor. I elected to run slowly and set the self feeder to slowly dribble the -20
classified concentrates.

The Self Feeder

The self feeder uses a 12 VDC motor with a weighted shaft to provide vibration which slowly moves the concentrates to the discharge end (where they drop into the regulated water flow of the S-1). Water is introduced (a drop at a time) just to provide lubrication. Once set up, the hopper can be loaded with a comfortable load of concentrates and when everything seems to be working well you can find other things to do.

The rate of feed is determined by adjusting the four leg lengths. We chose a slower feed rate to process the day's -20 concentrates since there was so little material to run. Had we chosen to run only one clean-up per day we could have easily done a week's worth at a time.

Recovery

Down to, and including, the smallest powder you could imagine.

Other side of the coin

The vibration of the self feeder will start it walking if it is set up on a hard surface - like a garage floor. Our simple cure was to set the system up outside in driveway gravel. Zero movement. Joel uses a piece of Styrofoam under the two support feet to stop the movement in his shop.

One last thing on the concentrator has to do with the water diffuser at the very top of the input area. it works extremely well, however, it's kind of like a 'flap' of heavy Miners' Moss. Sometimes this flap pushes up just enough to allow unregulated water to sneak out underneath. Simple fix - put a small round rock on the flap to hold it down. Rock is not provided.

Joe





[1 edits; Last edit by JOE_S_INDY at 10:28:06 Sun Oct 25 2009]

  
Tom_harris
05:50:08 Mon
Oct 26 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Hi Joe

Great report. How long do you think it would take to put through a 5 gallon
bucket of 30 -, at slow speed and at high speed.

Thanks
Tom

  
JOE_S_INDY
17:07:17 Mon
Oct 26 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Hi Tom!

5 gallons of -30 RAW concentrates - hmmmmm.

Maybe you would want to do what that guy dredgeguy mentioned does and take the 5 gallons of minus 30 concentrates and slowly and carefully run it through a G-1.

http://bb.bbboy.net/alaskagoldforum-viewthread?forum=2&thread=407&postnum=0

That would concentrate the concentrates down to a smaller volume of "Super Concentrates".

The lesser amount of super concentrates could easily be handled in 1/2 hour (if you run really slowly).

The advantage of using the auto feeder is that once it is set up you fill it with the super concentrates, make sure everything is working well and then you just go do something else. It runs itself. When everything is finished just do a final panning and start grinning.

http://www.usprospector.com/index.php/finishing-machine

Joe
[2 edits; Last edit by JOE_S_INDY at 21:11:53 Mon Oct 26 2009]

  
Tom_harris
07:24:58 Tue
Oct 27 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Thanks Joe

The reason I asked was the creek I am working on is a boulder pit and so it's
dig 3 shovels then move some boulders. so my thinking was to start classifying down to 30- by hand into a 5 gallon bucket . When I had a full bucket I would start running it through the S-1. While the concentrator was doing it's work I would start on another bucket.
I figured I could probably work more material this way than I am currently with my little 8" wide high banker.
but from what you say it may not be the best way to use the S-1.

Thanks for your help.

Tom

  
tabwyo
14:30:39 Tue
Oct 27 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Tom,
I think you'd be better off running your -30 classified material through a concentrator like the G-1 first. And save the finishing for weather when you can't, or don't want to, be out digging.

I am currently working an old bucket line tailing pile. Where a few oldtimers say the dredge hit a big caly stringer and completely gumed up the works. Forcing them to shut down and completely clean out. So this pile I am in is a whole bunch of everything mixed ito a pile. Lots of cobbles the size of my noggin. Mybest aproach yet has been to go in the day befor (when I have two days) and just dig me up a nice pile of dirt to work and seperate out all th cobbles fist size and bigger (I use and old chainlink fence gate propped up w/ 2x4's). Then the next day all I have to do is feed my G-1. If I only have a day, then I dig/classify for the first few hours then feed the highbanker. This way I can work a lot more material than if I were just digging and going straight into the banker.

  
LipCa
15:26:22 Tue
Oct 27 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Tom,
I would think screening "raw" material down to -30 wouldn't be very productive?
If you're wanting to screen smaller, maybe screening to 1/4 inch or 1/2 inch or so might be more productive?

  
Tom_harris
06:25:41 Wed
Oct 28 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Thanks for that input. I think your bang on with your approach. i usually only go in for a day, but I could make a pile that would allow me to run my sluice for a couple of hours straight. I'm also moving a lot of boulders that are a hundred + lbs each so am going to have to start using some sort of hand winch. And it doesn't matter were you put them they alway seem to get in the way. I'm also on a fairly steep bank which poses other challenges.
Can't wait to get back up there!!!

Once again thanks for your great advise.
Tom

  
Tom_harris
06:35:18 Wed
Oct 28 2009

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Re: After Action Report - US Prospectors S-1 Concentrator

Hi Lipca

I think your right that it wouldn't be very efficient to classify to -30, but I think I may give it a go just for fun. (Never let common sense get in the way of determination)
I think that due to the boulders I am dealing with that that dredge nozzle I have seen on the net that you can use out of the water may be the best solution in the long run. Not at the point yet were I want to put out that kind of dollars, but maybe down the road sometime. I think my approach is going to be only to buy new equipment that the gold I am finding will pay for. That should keep me with a pick and shovel in my hands for a long time.

Thanks again for your input.

P.S Also like to thank tabwyo for his great advise.

  
banjo
00:55:54 Sun
Feb 28 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Joe did you try stetting the unit on an extra sharp angle {over the recommended angle so the wash was belting through the unit} if so how did it perform on gold retention?

  
JOE_S_INDY
20:16:47 Sun
Feb 28 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Hey Banjo,

Long time since I've seen you post here - welcome back!

Well, to answer that question, I guess I would have to say no, I didn't try to max-out the drop angle.

The beauty of the S-1 is that it attempts to slowly (and with the highest level of subtlety) coax the very smallest bits of Gold from the classified concentrates. A slow processing time is needed to allow the tightly classified material to separate out and work around the captured Gold. Too steep an angle would make the water too fast, sweeping everything along with it.

The slow input of material from the self feeder is also important to the S-1's success. A regulated feed allows time for the heavier "Bits and Pieces" to sort themselves out as well, without the problems of washout. Too steep a processing angle with too high a process rate would blow out a lot of the smaller Gold.

Good question Banjo - pushing the limits sometimes does present a better way.

Joe S




---
Wiser Mining Through Endless Personal Mistakes
 
 
banjo
09:08:53 Mon
Mar 1 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

The pleasure is all mine thanks mate. Yes I can see what you are saying good point. Banjo

  
chickenminer
19:47:04 Mon
Mar 1 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Joe,
I'm curious. Did you use the feeder with wet and dry material? If so, how did it work with wet material? Was it a real pain to keep a constant feed rate?



---
Dick Hammond - Chicken, Alaska
Chicken / Stonehouse Creek Mining
Chickenminer.com
 
 
JOE_S_INDY
22:00:44 Mon
Mar 1 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Hey there Dick!

Wet.

The fact of the matter is that if it was run dry, it would be wet as soon as the hopper, lubricating water hit it. :confused:

I ran the last of last summer's cons yesterday and here is how I did it:

Classified to -20 and anything over that was easy to pan out. (Actually -1/8 to +20 could also be another 'run' if someone didn't like panning that size range.)

I set up the S-1, a 12 Volt battery, the Auto Feed ("The Wiggler"), a tub and a small bucket in the tub for the discharge of the S-1.

From experience I set up the angle of the S-1 and "The Wiggler". Use the system once and the set-up is with you forever.

I powered up the 500 GPH bilge pump, adjusted the flow of lube water into the top of the hopper (1.5 drops per second or so) and started piling the wet sand in. About the equivalent of 1/2 of a "True Temper #2 Hand Held Steam Shovel" load of wet concentrate was carefully loaded into the hopper so that the water slowly wandered by while the vibration "sort-a liquified the pile". Everything flowed down and ended up pretty flat with the water slowly flowing through the hopper and the material slowly traveling down the activated "streambed" to the drop into the S-1.

I walked away. Every 20 or so minutes I would check it out - just 'cause it's winter, you know.

I usually prefer to make only one pass, so I have the S-1 on the flattish side. Even 'flattish' it will easily work the material through itself and not 'sandbar'. A steeper run with more input material coming in might allow too short a 'dwell time' in the S-1 and then some of the smaller 'stuff' might ride through. That means a second processing.

I catch Gold so fine that I have to use a small magnifying glass to see it. Scarry Good! This time I saved 'the run' and plan to do it a second time in a day or two (Winter, right?).

Once set up you just let it run! :smile:

Joe S



---
Wiser Mining Through Endless Personal Mistakes
 
 
RUSTY_HAPPY_CAM
23:06:54 Mon
Mar 1 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Joe, I run mine just like you with equally as good of results. Of all the different clean up products I have tried over the last 2 years the S-1 is by far the best and easiest to use. A note on running dry cons. Just turn off the hopper water feed and run them totally dry in the feeder. It will require a flatter setting to the feed hopper to slow down the feed but works as well as wet.

  
RUSTY_HAPPY_CAM
02:21:29 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Wizard,I assume you are pulling Joe's chain a wee bit. In my case the answer to most of your questions is I do it the easiest an fastest way I can. My cons are all from dredges on the Klamath river. I have no scientific background and don't have the patience to systematically test products like Zooka. In my case I screen to -20 because that is about the size that US Prospectors recommend and it is reasonably easy to do. I normaly run my cons totally wet, since it it is usually at the end of the dredging day. I use my clean up equipment in the real world not in a lab so my requirements are simple. Does it work, is there an easier way to get the same or better results and can I afford it. So far the S1 is in a category of it's own. I can process cons faster and better with it than with any other system in it's price range that I have tried.

  
colo_nuggets
02:50:04 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Say Rusty when your doing yours cons did you see any red specks real small but real bright. You can see the gold dragging then tiny platinum specks and then there rare, but red specks dragging slowww what are those?? Scott

  
RUSTY_HAPPY_CAM
03:40:00 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Usually Garnet but I seldom see them out here. I saw a lot of them in Ga. At least as many as black sand and some were 1/4"+

  
colo_nuggets
03:58:05 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

This isn't garnet it drags third, 1st gold , then tiny tiny platinum specks, then these red specks dragging slower than platinum. I still have a couple. At first I thought it might be metallic paint specs off a fishing lure, but its behind the platinum. Keep a eye out on the slick plate for them. If i have them so do you!

  
JOE_S_INDY
04:41:43 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Hey there Rusty,

Yes, some folks really do get on your nerves - especially when they let their immaturity shine through for all the world to see. I guess that's what the 'ignore feature' is there for.

One thing that I found is that the shaker plant concentrates that I brought back to run this winter should have been run through the G-1 first. Too high a % of light material which took time to process. Next time concentrate the cons, classify and then run the undersized heavies through the S-1. Of course, it's winter and even clean-ups are welcome.

Joe S




---
Wiser Mining Through Endless Personal Mistakes
 
 
chickenminer
06:12:06 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Joe,
Okay.. I did not realize that even dry cons in the feeder used water to distribute.
I bought an S-1 this winter to use next summer. Was just curious on the feeder. No way I am going to dry cons before running through, so all will be fed wet.
I pull/clean the top 4' of the box after every 8-10 hr run. My opinion it is one of the best things a guy can do to increase recovery. End up with abt 5 gallon bucket. I normally screen -14, then pan that down somewhat and final clean in the wheel. I want to get around all the panning. Have you tried running coarser than -20?
Another thing. I really don't like not being able to pull the mat out to cleanup. Does that "banging the bottom" really work to clean it out ??



---
Dick Hammond - Chicken, Alaska
Chicken / Stonehouse Creek Mining
Chickenminer.com
 
 
JOE_S_INDY
12:02:35 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Dick,

I use 20 mesh as the cut off point since I, personally, have no problem with panning down to that size. Less than about 20 runs well in the S-1.

The practical max size is probably right there at 1/8 inch since there are no catchments other than the V matting and the wire mesh.

The other practicality is that the Auto Feeder has a fixed gate, used as a regulator or restrictor, which holds back any surges. The opening under this restrictor is about 1/4 inch - and I use the Auto Feeder consistently as a part of the S-1.

If you have 5 gallon buckets of High Graded upper riffle material I would run that material through a small sluice - like an A-52 - then classify down to minus 14 mesh and then run that through the S-1 using a regulated feed.

Banging the S-1 to cleanup is how we started out, however, I found an alternate way. Stand the S-1 up on end at about 80 degrees in a bucket and start up the recirculating pump. The water races down the S-1 and all material is washed down into the bucket. That really does clean out the S-1!

Joe




---
Wiser Mining Through Endless Personal Mistakes
 
 
chickenminer
19:47:24 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Joe,
Appreciate the info. I did not buy the auto feeder, figured I would make my own.

Running the bucket of cons through a small sluice is what I do now. I was hoping the S-1 would replace that. Looks like I will have lots of experimenting to do.



---
Dick Hammond - Chicken, Alaska
Chicken / Stonehouse Creek Mining
Chickenminer.com
 
 
RUSTY_HAPPY_CAM
22:10:25 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Dick, as I said above the S-1 is the best system for the money that I have tried. I think the auto feeder is what sets it apart from the other small sluices out there. If you are handy I am sure you could make one that will work. In fact that is the only short cumming I can find with the unit. The feeder is too small. It would be nice if it could handle 5 gal buckets. The system takes several runs to get it adjusted correctly but it is worth the time spent. From then on you just need to visit 1-2 times an hour to add more cons and it does the rest.

  
colo_nuggets
22:32:51 Tue
Mar 2 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

If it has a short "cumming" I guess the feeder would be to small :devil: :devil: :devil:

  
chickenminer
04:12:07 Wed
Mar 3 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

colo_nuggets ...
Too funny !!

Rusty....
Good to hear on the S-1. I know I can make some kind of feeder, don't think it neccessarily has to be a vibratory one. Could be something like a large funnel shape with gate valve at bottom. Keep enough water in funnel to insure a flow. Just thinking out loud here.
Have you run larger than -20 through?



---
Dick Hammond - Chicken, Alaska
Chicken / Stonehouse Creek Mining
Chickenminer.com
 
 
RUSTY_HAPPY_CAM
04:29:40 Wed
Mar 3 2010

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Re: After Action Report - US Prospectors S-1 Concentrator

Yes I have ran as large as 1/8". There is almost no 1/8" gold in the cons that I ran so I can't say how well it caught that size. I would think it would do well since the water flow is so slow. It would just require a slower feed rate to prevent loading.

  

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