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Nov 20, 2012, 06:17 PM
#1
the groper of gravel
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Nov 21, 2012, 12:37 AM
#2
Looks great! Love the cheap walmart solutions.
Seems like you might need some sort of water diffuser on the input?
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Nov 21, 2012, 05:35 AM
#3
well lets see how it works on fine gold! looks like youve had some sleepless nights thinking!
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Nov 21, 2012, 07:16 PM
#4
the groper of gravel
Will be cranking it up over the thanksgiving holiday. I'll let you know if it works.
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Nov 23, 2012, 05:21 AM
#5
 Sniper
Did it work well for you today?
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Nov 25, 2012, 04:49 PM
#6
the groper of gravel
As you can see there are two traps built into this contraption, it took some doing to get it set to where it would catch the majority of gold. The way it is now, it will catch most of the gold in the first trap, some flakes in the second, and at least 1 flake was pulled out of the tank. It does not wash all of the black sand away. If I set it up to remove all of the black sand, it flushes some of the finer gold out as well. I also discovered some small pellets along with the gold in both traps, some were magnetic and some not. I would say that it was basically a good machine, but you still have to pan out your traps. I think this thing would work well at the river where I could draw clean water, but the river is much too far away.. I may be able to refine the machine in some way, but as yet I have no idea what I would change.
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Nov 26, 2012, 06:27 AM
#7
id rerun the cons with a lower water pressure or a less tilt on your sluice to see what got by you! you just cant beat seeing a peice of equipment that you built and its rewards!congrats!
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Nov 26, 2012, 07:05 PM
#8
the groper of gravel
 Originally Posted by russau
id rerun the cons with a lower water pressure or a less tilt on your sluice to see what got by you! you just cant beat seeing a piece of equipment that you built and its rewards!congrats!
I am already running with very little water pressure, and the tilt is modest too. I even put several drops of Jet dry into the water. if I back off on anymore controls I will not blow out any sand. I really think I need fully adjustable flow stop plates, because I think just a fraction of an inch could make the difference. getting that kind of control might just make this thing work better. I also wish I could make the body out of clear plexi because it would help if I could see exactly what is going on inside the traps. Even painted green and with a light shinning from above I can't see whats going on unless I shut it down and look in once the water stops moving.
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Nov 27, 2012, 03:35 PM
#9
I think your answer to better recovery is going to be classifying the material smaller. With smaller material you wont need as much flow to blow out the gangue. But keep in mind no sluice gets 100%, there's always going to be a point where its better to run more material (yardage) then try for every little bit of recovery of sub 100 mesh. Classification is why the triple stage dredge sluices work so well for all sizes of gold.
Sample till you find the hot spot, then mine it till its gone! Then start over...
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Nov 29, 2012, 06:53 PM
#10
the groper of gravel
 Originally Posted by Astrobouncer
I think your answer to better recovery is going to be classifying the material smaller. With smaller material you wont need as much flow to blow out the gangue. But keep in mind no sluice gets 100%, there's always going to be a point where its better to run more material (yardage) then try for every little bit of recovery of sub 100 mesh. Classification is why the triple stage dredge sluices work so well for all sizes of gold.
I'm only putting the last bit of black sand and gold flecks from the pan, the sluice box is supposed to clean the last of the black sand away. At least that was the idea.
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Nov 29, 2012, 08:52 PM
#11
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Nov 29, 2012, 10:45 PM
#12
David, where did you get the ridged matting for the plastic sluice?
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Nov 30, 2012, 06:47 PM
#13
the groper of gravel
I'm with rebel, where did you get the riffles?
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Nov 30, 2012, 07:41 PM
#14
I made them, Made a form and Vacuum molded them, out of ABS sheet plastic. A friend of mine owns a Plastic Forming shop so I had some help and the use of his equipment I am Still experimenting and will have a new better design out shortly, right now I am working on a patient.for my new design. And the new one will be made out of Green ABS.
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Nov 30, 2012, 09:05 PM
#15
Good for you. Sounds great.
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