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shaftsinkerawcRe: the best concentrator table?
The table I saw had an adjustable funnel similar to the photo and had a small water jet aimed at the base to fluidize material comeing out of the funnel as well as a small water jet wetting the material as it was scooped into the funnel from the top. Seemed to work pretty well. awc
Traveller11Re: the best concentrator table?
Hey Muley
That's a great idea for a feed hopper. I agree that most concentrators would benefit from having a steady flow of feed as opposed to dumping shovelfuls in.

Any ideas for an auto feeder that would run wet material?

Prospect09erRe: the best concentrator table?
Video of that UHF by Sierra Metal Fabricators you mentioned Geo_Jim. Interesting

dredgerRe: the best concentrator table?

" So far I've screened to -200 mesh, but can go as far as -500 mesh that's my finest screen."

My line of thought is to classify under,???.

U.S. Standard * Space between wires
Sieve Mesh No. Inches Microns** Typical material
14 0.056 1400
28 0.028 700 Beach sand
60 0.0098 250 Fine sand
100 0.0059 150
200 0.0030 74 Portland cement
325 0.0017 Silt 44
400 0.0015 37 Plant Pollen
(1200) 0.0005 12 Red Blood Cell
(2400) 0.0002 6
(4800) 0.0001 2 Cigarette smoke

* The mesh numbers in parentheses are too small to exist as actual screen sizes; they are estimated and included just for reference.

Somewhere around -200 as the final cut, or lowest classification processed and tabled, and blowing off or washing off, to the side,

( or what ever the table term is ), all the light Sg, materials -200, all the black sand,flat and flaky gold, and only leaving the " Clean " chunky clean gold ( -200 ), my focus will be to direct the clean chunky gold in to a container / bucket,ready for the bank, I am not concerned or motivated on getting %100 recovery chunky gold, %60-80 clean will be great , my focus will be to remove as much big chunky gold before it goes on or over the following table, and hopefully " retuning " that table to get a better recovery on lighter Sg gold / materials,-200.
I don't know if that will work,but that is my direction of thought ,
And i will fit a de - watering device to remove the water added on the feeder,before the lighter Sg get on the table, I suggest that would not be much of a prob,

:devil:, :confused:

As opposed to the to the " Visual Conformation feeder " concept i mentioned earlier, which i will post on the Dredging with a Excavator thread,asap,

Muley, I would appreciate your advice after some thought , have a good day,
dredgerRe: the best concentrator table?
No worries Muley, sorry i am just getting excited about this idea, that i think you put in my head, :smile:.

I think the concept will work well in my situation, ( visible confirmation ) and perhaps yours, with a small hitch,anyway i have or I am working on another post and a sketch that really should explain the idea better, pic sketch says a thousand words,

Anyway back to it, back asap.

MuleyRe: the best concentrator table?
dredger, I on a project that is taking up all my time right now, but I have some super con's that came off the RP-4 and around the 1st of the month I wil screen them down to see how fine of gold I got. So far I've screened to -200 mesh, but can go as far as -500 mesh that's my finest screen.
dredgerRe: the best concentrator table?

Great,thanks and your observations is /are very interesting,


1/32",ouch, orbital, due to the length of the springs I am guessing,

And anti-clock wise direction be my first guess, (looking side on to the machine ,( bottom pic ) ,inlet on the chute /slid left side, outlet ( lower angle ) on the right side, and assuming If a clock /face were hung on the visible right side of ya machine, ( bottom pic, ),

Your observation, " One thing that I have observed is that as the hopper empties and the last of the cons are coming down the chute they tend to get to near the end and then turnaround and start going back up the other side of the chute, in rotating fashion." ,

Very interesting, I would suggest if you placed your sharpie on the lower end ( out let )of the slid, you would or might get a larger then 1/32" orbital mark /scratch , as the orbit is usually larger or amplify s as you move further away from the center of the vibration mechanism center,( irrelevant of the angle ) perhaps explaining that the turnaround is a larger diameter "anti-clockwise" orbiting / force, and placing your finger such, would reduce the orbit / force, and allow the cons to move down as you say,

Thing to remember here is your feeder works and has worked great for 5 years,so please don't change anything, but,
Another thought could be, ( oops, before I mention that, I wanted to say I really like your any size / any shape ?? hopper bracket, very adjustable , I like it,well made to), so just to theoretically theorize lets imagine you lift the hopper, and unbolt the slid, fit a bracket to under the slid and reverse the direction of the slid, bolt it back on,and changing the direction of the slid, you might get a " clockwise " orbit, which may cause materials to rush down the slid, too fast, and suggests someone has already put a lot of thought into the angle /vibration direction of the original bracket,
Another thought, and only a thought is to turn the Syntron on its side on to the slid and cause a " horizontal or flat orbit, ???. ", and basically shake the slid from side to side, left to right, amplifying the orbit as it reaches the end of the slid, which I suggest would also cause the materials to rush though your feeder , and perhaps also loose good control of the feed, that you already have,

Muley, mate, you asked for thoughts, and considering i hate going off thread subject, so a few thoughts on the " best concentrator table ",here we go.

Dang, as far as Tables go, ( my opin ) we " push and push " with over screen size materials, we all push and do it, to any recovery system that you have to classify or screen the cons,for tables ,blue bowls, ect, , I would suggest to improve or just allow a table to " be "more efficient, ( in your case, situation,feeder, table, we could without too much trouble, improve your recovery,)

First please , tell your screening size in Mileometers over the table, and supply pic or good description of shape / sizes of the gold you are recovering under your screen size, eg, placer, beach, aluvial river, crushed ore, ??. fat chunky flaky flat, flighty,

Sorry gotta run, back asap, dredger.

Ps, if this works it will be easy cheap,efficient and fun, I hope,

MuleyRe: the best concentrator table?
I did as you asked, I put a Sharpie agaianst the leg with the point touching the slide, turned it on and it just made what looks like a 1/32" of movement in all directions. One thing that I have observed is that as the hopper empties and the last of the cons are coming down the chute they tend to get to near the end and then turnaround and start going back up the other side of the chute, in rotating fashion. This is only in the lower portion of the slide. If I put my finger on the end of the chute with a slight pressure then the material will continue off the end of the chute. This only happens when the hopper runs out. So I would say that the energy from syntron is "Orbital"? any thought's?
dredgerRe: the best concentrator table?
Thanks Muley,

Just working on todays concept / dream,:devil:.

Great feeder ya got there too, I have experienced vibrating feeders in plastics , Pharmaceutical, Tobacco, and earth moving, excellent feeder mechanism, and I suggest any form of gold recovery system from the Popandson sluice concentrator right up to big multi tables benefits greatly by having a constant and controlled feed,similar to Muley's,

Mate, please , can I ask you for another little favor, that is could you please take a pencil or felt color pen, and hold it on the frame, and the tip on the gutter pipe, then turn it on, then off, so we can see or you can tell us which direction and length of travel and the movement of the vibration, vertical or horizontal, ??, or what ever, and distance of travel, which could also indicate the direct of which the materials are under the most amount of force,and is that force direction with or against the fall in the angle of the rain pipe, ??????.

Also, I do not know why I have always used the pencil or a length of steel to mark or scratch marks on moving vibrating screens feeders ect, but I highly recommend it,


I think you will see that the materials build up at and on the bolt heads, and backing up from there to block the mouth of the bottle, when there is no vibration, I would also suggest if the feeder was stopped after running some materials, the materials below the bolt heads would continue to slid off the chute,

Also, your comment,

, " I have found that a lot of the fine gold floats away if you run the material dry "

Really reminded me of some frustrating unfruitful testing of vibration for gold recovery, and left with only one line of thought and that is a single vibration or movement, can move a chunky ( say ) 1mm, gold bit in a different directions then a fine flaky bits 1mm of gold,

Which also gave me another idea, or another use for a syntron, or vibrating chute, / rain gutter, feeder,

As a visual confirmation of how much gold is traveling through a basic concept of a vibrating "feeder ",please note, this or my concept is " not " focused on feeding to a shaker table, ( but who knows it could go that way, ??.)

Now, I could blar blar off the subject or this thread on feeders, which is directly related to " the best concentrator table ", which so far has been great,

Where as my line of thought is or was " visual confirmation AND FEEDER " now is also further focused on "recovery of high grade clean chunky gold of various classifications, as well, hmmm, which again is better suited to the " dredging with Excavator ", where the processing plant is focused on recovery of concentrated cons, not producing clean gold,


MuleyRe: the best concentrator table?
Dredger, By all means, use my pictures.

Lipca, It don't matter on the size of the material, I've used sluice box cons down to 20 mesh, From a feeding side it's just a small adjustment on the speed controller, However the RP-4 choke's when I try to run bigger than 20 mesh.

I need to figure out how to "You Tube" that way everybody can see it in action.

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