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Gold Prospecting
Do It Yourself (DIY) Projects
ADVICE ON BUILDING HIGHBANKER ( RIFFLES... )
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<blockquote data-quote="blisters" data-source="post: 345214" data-attributes="member: 4992"><p>If the riffle is on top of the expanded instead of welded flush with the bottom (cut the expanded) then you risk blowing your concentrates out from under the riffle unless it is sealed to the base of the sluice. If the expanded is small it may seal enough with carpet etc. but with larger expanded with large holes then you'll blow it out. Tath posted a bit on this subject if you search and was successful with a small gap below the riffle.</p><p></p><p>They're great documents that Jemba provided and they do specify separate riffle and expanded sections so take note of the water required to drive them and the reasons why they're separated and their gold size target. Mixing riffles with expanded might result in neither working at full efficiency. Keep in mind the height of the expanded/riffle is reduced as the underlying carpet/moss etc. enroaches into its space until it performs poorly. The thing to realise also is that those studies document the designs for large scale operations compared to banking. They take into account slurry concentrations so as to not overload the sluice.</p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 345214, member: 4992"] If the riffle is on top of the expanded instead of welded flush with the bottom (cut the expanded) then you risk blowing your concentrates out from under the riffle unless it is sealed to the base of the sluice. If the expanded is small it may seal enough with carpet etc. but with larger expanded with large holes then you'll blow it out. Tath posted a bit on this subject if you search and was successful with a small gap below the riffle. They're great documents that Jemba provided and they do specify separate riffle and expanded sections so take note of the water required to drive them and the reasons why they're separated and their gold size target. Mixing riffles with expanded might result in neither working at full efficiency. Keep in mind the height of the expanded/riffle is reduced as the underlying carpet/moss etc. enroaches into its space until it performs poorly. The thing to realise also is that those studies document the designs for large scale operations compared to banking. They take into account slurry concentrations so as to not overload the sluice. Jon [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
ADVICE ON BUILDING HIGHBANKER ( RIFFLES... )
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