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Gold Prospecting
Alluvial Gold Prospecting
My highbanker, should this be just flat bottom under the Grizzlies?
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<blockquote data-quote="blisters" data-source="post: 244885" data-attributes="member: 4992"><p>Wow that's one big sluice I got muddled with the gs12. As Jemba said water and fall but I assume this was ok and just big rocks were getting stuck? I have to put a little more water and fall than I would like in order to clear the top of a gs17 and occasionally flick over the stuck material on the top riffle usually only larger flat rocks. If I don't then it mounts up quickly. Running slick to the second riffle would probably correct this but I haven't gotten to modify it yet.</p><p></p><p>This is what I was talking about with the water dropping when rocks sit on the grizzly:</p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4992/1461253570_grizzly.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Reports of the perforated plate suggest rectangular or square holes are better than round as they don't block as easily such as the cable tray used in the walbanker. I haven't tried it but was thinking along the exact same lines using the cable tray. You would want it to clear the hopper bottom to suit the classified material size and your water volume over the various hopper angles you might use. I'd say the slope should wash the smaller material down to the grizzly no problem but trial and error with that one if it doesn't. I don't like any coloured water flowing off the back but at the point of the grizzly no water should be flowing on top of your plate just waste.</p><p></p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 244885, member: 4992"] Wow that's one big sluice I got muddled with the gs12. As Jemba said water and fall but I assume this was ok and just big rocks were getting stuck? I have to put a little more water and fall than I would like in order to clear the top of a gs17 and occasionally flick over the stuck material on the top riffle usually only larger flat rocks. If I don't then it mounts up quickly. Running slick to the second riffle would probably correct this but I haven't gotten to modify it yet. This is what I was talking about with the water dropping when rocks sit on the grizzly: [img]https://www.prospectingaustralia.com/forum/img/member-images/4992/1461253570_grizzly.jpg[/img] Reports of the perforated plate suggest rectangular or square holes are better than round as they don't block as easily such as the cable tray used in the walbanker. I haven't tried it but was thinking along the exact same lines using the cable tray. You would want it to clear the hopper bottom to suit the classified material size and your water volume over the various hopper angles you might use. I'd say the slope should wash the smaller material down to the grizzly no problem but trial and error with that one if it doesn't. I don't like any coloured water flowing off the back but at the point of the grizzly no water should be flowing on top of your plate just waste. Jon [/QUOTE]
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Gold Prospecting
Alluvial Gold Prospecting
My highbanker, should this be just flat bottom under the Grizzlies?
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