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people online in the last 1 minutes - 0 members, 0 anon and 0 guests. (Most ever was 29 at 13:36:32 Sat Aug 3 2002) |
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lostDutchman 03:15:08 Thu Apr 12 2012 Offline 8 posts Reply |
This is my second go at building a trommel to screen my material before passing it down my G1 Highbanker. I'm getting about 4x processed, better gold recoverey, and its more fun to run. Total cost of materials is about 350.00 to 400.00, much more reasonable than the 4k most builders want for units of this size. The smaller grey sluice is one I bought off of DanFromNY last year. It has me second guessing my g1 setup now since 90% of my gold has been found in the "beach sluice".
G1 Trommel Tray Setup There is a nice low pressure current on the box end of the beach sluice that seems to be a magnet for the gold. Here's a sample of what came out of that setup. I was very impressed with the fine and coarse gold recovery.  Many thanks to DanFromNY and Joel Farmer for building such nice sluices. |
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Greg_in_BC 16:10:19 Thu Apr 12 2012 Offline 405 posts Reply |
Lost Dutchman, I love the ingenuity, thanks for sharing!
Looks like a great setup. Do you know what you water flow might be coming out off the G1? As far as the beach sluice being better than the G1 I would think you would have to reverse them in order to find out if the G1 might do just as well as the lead sluice? As you say the head of the beach sluice with the nearly standing water will be a great place for the gold to sit down without even going through the riffles. Is there a pile of material there when you shut down? Cool operation and niiice character gold :smile: Thanks, Greg |
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jcazgoldchaser 22:55:27 Thu Apr 12 2012 Offline 5 posts Reply |
I'm assuming the belt is keeping the front off the guide wheels (at least 1 wasn't turning) because it is mostly empty. Do these come under load when material is being run? Otherwise I'd be worried your belt is too short and the load is being applied to your motor bearings.
Thanks for posting, looks like fun!! |
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lostDutchman 23:44:05 Thu Apr 12 2012 Offline 8 posts Reply |
Greg,
As far as the low pressure system in the beach sluice goes, yes, it does collect sand and other material as well as gold. The amount of material is very manageable and all fits within one gold pan. I use this upper tray for spot sampling now. I'll stop down every now and then to see if there's any gold in the beach sluice. If there is enough, I'll do a full stop and clean out the upper G1 tray as well. As for the water question... Each of those pumps is supposed to push 50-60 Gpm. I was going to ask JoeSIndy about that. I used to run this unit with just one of those pumps before I built the trommel with great results. The day I shot the video I was experimenting with running 2 pumps. One for the trommel and one for the G1. Whats interesting is that when I run the trommel/G1 with only 1 pump, my drop riffles in the G1 fill up with larger rocks and fewer sediments. When I ran the setup with two pumps, I had more small sediments in the drop riffles, but no large rocks. I'm assuming that when I run with only 1 pump, i'm not getting enough water across the G1 tray which is causing the riffles to flush instead of "upgrading the heavies" like its supposed to. My instint tells me I should be running this setup with both pumps which would probably put the total GPM around 100 or so. Side note. I have more beach sluices in my garage. I'm building metal frames for them now. I'm going to play with a setup which uses 3 of those trays instead of just one. I'll do a test with and without the G1 to see if I even need it at this point. |
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JOE_S_INDY 01:20:20 Fri Apr 13 2012 Offline 1384 posts  Reply |
Hey there, LD!
I have looked at that video of yours over and over. Well done, Sir! The upper tray of the G-1 is too flat. The upper tray is initially set up so that all the water just goes through the expanded (with none skipping through the expanded area). The lower tray is then made to be too flat (causing a sand bar to form in the exact center of the lower tray ). The tray is slowly steepened until the sand bar begins to go away. If the sand bar begins to go away you are right on the balance point between top dynamics and the lower tray working on it's own (given water flow and material flow). That is how the G-1 should be set up (according to Joel Farmer's original set-up directions)- independently of the water flow from the trommel. You have the trommel classified material (it looks to be minus 1/4 or possibly minus 1/2) with the additional water going through the plastic sluice adding even more water to the too flat upper tray. If the upper tray were to be steepened, then the water (more than I, personally, use) would be able to drop a lot of the pre-washed Gold into the drops of the upper tray, as well as capturing small to ultra small Gold in the lower tray. Another small thing - the input point of the plastic sluice (delivering undersized and water) is, possibly, too high on the G-1's top tray. The square spray bar will (aside from washing shoveled in material) push up and send on it's way, the usually shoveled in material inputted into the center of the wash area. I suspect that the sluice box delivery should be dropped a bit to enter the G-1's wash area in the center of that area. Picky, picky I know! That is the ONLY bit that I can add to your system. Increase the drop on the upper tray of the G-1, decrease, a little, the deluge spray water in the G-1 upper tray to offset the already trommel washed and classified (with added water) and set the lower G-1 tray to reflect the change in dynamics. In addition, realize that using the trommel already removes the need for the classifying feature of the G-1's upper tray screen, while the plastic sluice box also is a redundancy for some of the upper and lower tray catchment. What you will find though is that with VERY close scrutiny, you will see extremely fine Gold in the lower tray of the G-1 as well as all the delivery sluice's other lost gold. OH, is there a hopper to shovel into for that trommel - or do you have to hit the trommel's bull's eye with every shovel full? Well Done! Joe
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fubar 02:18:16 Fri Apr 13 2012 Unavailable 166 posts Reply |
Joe:
Is that G1 in the video, the same thing that you and BJ showed to us a couple of years ago? It looks like it is well suited to being lashed up under a trommel like that. Scotty |
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JOE_S_INDY 16:07:52 Fri Apr 13 2012 Offline 1384 posts Reply |
Hey Scotty!!!
Yes, sir, it certainly is.  In fact I have most of a small (and yet incredibly heavy) home made trommel that I need to de-build and then re-build with an eye toward increased performance for the G-1 as well as much less dead weight for the trommel. Heavy clay breakup as well as pre-classifying makes a lot of sense where I'll be working this summer. I should, as well, be able to lash up a 2" dredge pickup and feed the trommel with the quite-some-distance-away safety factor to minimize those dangerous "True Temper, Hand Held, # 2 Sweat Activated Steam Shovels". Joe
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dickb 19:44:20 Fri Apr 13 2012 Offline 102 posts Reply |
Hey Joe and others:
Here's a real nice trommel build from over on CP's forum. I think it came out really swell. http://www.youtube.com/watch?v=3Pib9L1tWsI&feature=youtu.be I think if your going to highbank dirt, it's a productive way to get it done. JMHO Dickb |
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fubar 21:05:18 Fri Apr 13 2012 Unavailable 166 posts Reply |
Well Joe,
When you get here I've the shop, the time the tools and the willingness to help, then we can share your project here on the forum!! Thanks for the pic, now I remember the fun we had packing the stuff up and down the gorge...but it sure seemed to work good. Scotty |
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JOE_S_INDY 23:44:50 Fri Apr 13 2012 Offline 1384 posts Reply |
And so we shall this summer!
Everyone stay tuned for progress this summer and fall. Joe
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lostDutchman 04:11:40 Sat Apr 14 2012 Offline 8 posts Reply |
Joe,
Thanks for the feedback on the g1 setup. You're the only other miner I know that uses one of these units regularly. You've confirmed my thoughts concerning volume of water being too high for this unit with both pumps. Next time out I'll put a ball valve on the head of my G1 and adjust accordingly. I also agree that the whole trommel could probably drop another 4" or so to feed the g1 hopper a bit better. On a side note, I just picked up my first welding unit and am learning to weld, so hopefully this will expand my possibilites of setting up future sluice/trommel combos. I'm finishing up a metal stand for more beach sluices to run stacked. It will be fun trying out different things this summer. I'm almost having as much fun fabricating as I do mining. :smile: |
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baub 21:46:34 Sun Apr 15 2012 Offline 915 posts Reply |
Several of the trommels I've seen on the sites are very well done. The ones I like best have the trommel drive motor mounted on top of the trommel. Might keep the water etc out of the motor better.
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JOE_S_INDY 22:15:59 Sun Apr 15 2012 Offline 1384 posts Reply |
LD,
I have received at least 75 emails and PMs from users of the G-1 - probably more, now that I think of it - and each user is thrilled with the equipment. I guess the disenchanted miners never contacted me. Probably the trommel does all the cleaning and classifying that needs to be done to your shoveled in material - and at a grand volume it would seem. Also, probably, the plastic delivery sluice is redundant for the work that the G-1 is well prepared to do. My thinking - pull the plastic sluice box and replace it with a simple short trough at a pitch to provide good transportation of material through that delivery trough. Drop the washed and classified undersized material to the top tray of the G-1 at a little above mid hopper area. You shouldn't need to add any extra water to the G-1 if enough water to do the job comes through the trommel chute. Adjust the G-1 top and bottom tray as I mentioned. PM to follow. Joe
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Darkstar_Mining 01:38:10 Mon Apr 16 2012 Offline 46 posts Reply |
If Joes right, and I'd say he is, you might want to rerun those tailings post mod run and calculate your loss and improved yeild..looks awesome, it's a nice compact rig, mobile too, good job!! God bless and good mining.. :smile:
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