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Gold Prospecting
Alluvial Gold Prospecting
Spray bar and mat testing advice needed.
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<blockquote data-quote="blisters" data-source="post: 284064" data-attributes="member: 4992"><p>The water looks too violent over the riffles and too much aeration, I'd reduce the slope of your hopper which will slow the water hitting the sluice, I run mine quite flat. Those rooster tails will be throwing your stratified material back up in the air all over the place and your gold will sit nicely inside those bubbles. The first video you can see that the water jumps off the first riffle which defeats the purpose of the slick plate. If you wanted a slick plate then put a block of wood in there to raise the level so the water enters the riffles at the same height allowing the material to stratify. That's why the second and third video look better as the water is dampened a bit as well. You want the water to run over the riffles in a reasonably smooth action. I'd just run the second or third configuration, lower the hopper and adjust the water and sluice to get a smoother flow. By the way a 12mm square mesh over the grizzly will give better classification and stop flat stones clogging your sluice with a trade off that it requires more clearing.</p><p></p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 284064, member: 4992"] The water looks too violent over the riffles and too much aeration, I'd reduce the slope of your hopper which will slow the water hitting the sluice, I run mine quite flat. Those rooster tails will be throwing your stratified material back up in the air all over the place and your gold will sit nicely inside those bubbles. The first video you can see that the water jumps off the first riffle which defeats the purpose of the slick plate. If you wanted a slick plate then put a block of wood in there to raise the level so the water enters the riffles at the same height allowing the material to stratify. That's why the second and third video look better as the water is dampened a bit as well. You want the water to run over the riffles in a reasonably smooth action. I'd just run the second or third configuration, lower the hopper and adjust the water and sluice to get a smoother flow. By the way a 12mm square mesh over the grizzly will give better classification and stop flat stones clogging your sluice with a trade off that it requires more clearing. Jon [/QUOTE]
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Gold Prospecting
Alluvial Gold Prospecting
Spray bar and mat testing advice needed.
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