4/15/2024 0 Comments Sluice box riffle angle![]() ![]() ![]() Then run a 3/4 to 7/8 wire mesh screen over smaller riffles and expanded for the next 3 feet. The way this box is set up with the header going from 24" wide to 34" wide over the first 3 feet would seem to me to be the best location for un classified 1 1/2" riffles for bigger gold. The riffles in this old Dahlke are the same with the addition of 1 1/2 flat bar in some areas. Its always been a modified type dredge riffle from Keene or Proline with more of a 45 at the top running flat with the box. I've never seen actual 90 degree angle iron run in a dredge before. I’m a carpet under miners moss guy due to Clarkson. Gold Losses at Klondike Placer Mines - Gold Recovery Project 1989Īn Analysis of Sluicebox Riffle Performance 1990Ī review of placer gold concentrate recovery and upgrade options 2011 The Poling and Clarkson reports are great.įine Gold Recovery of Selected Sluicebox Configurations 1989 What do you think about this equalizing power jet design and hose attachment to the powerjet/flair.ĭredge came with four 18hp Vangaurd motors and two powerjet/flairs.Īny opinion on any part of this or links to information is appreciated! Thanks Also curious what you guys think of just carpet and moss over carpet in some of these different sections, what size riffles and expanded for the different sections also. I would like to make 2 sections in there for some hog mat maybe. Last 2-3 foot maybe run a section of 1/2" woven mesh and then 1/4" woven mesh over a combination of smaller riffles and expanded metal. Was thinking 1/2-3/4 woven mesh for the first 2-3 feet over a combination of Hungarian riffles and expanded metal ( separately, not on top of each other). Dropped the water flow to 1/2 the rate when the screen was 1-1 1/2" above the expanded. He said they have been testing 1/4" woven mesh (1/8" thick) over expanded metal and it was really doing well. Had been thinking I wanted to do some smaller woven screen at the last few feet of the box for smaller gold and then talked to Mark Keene. The old riffle set up leaves a lot to be desired. 1st 3 feet follow the flair angle till it meets the max width of the box. I have all winter for the build.īox is 9'x34". Also curious to what you guys think about some new types of matting in a large dredge. I can build/fab just about anything needed. Sadly when the old AMDS forum shut down I stopped keeping up with any other forums with new information after bouncing around a while. Looking for links to good information and/or input on ideas on how to put a box together. Most of the gold ranges from 30 mesh to 4 mesh. What we do have is potential larger gold (1-5oz nuggets). ![]() We do have fine gold but not a ton of it. For the most part I'm going to use this on our claims that are on a larger creek. I like Keene's sump system for fine gold but I wont be building that. Did a bunch of googling, youtubing and searching forums, but its hard to come up with great information about sluice box design for a larger dredge like this. I've read "The Clarkson Study" a few times over the years and just re-read it. Main question I have is about sluice box design. We're going to go through the whole thing and get it back up and running. ![]() So we did end up pulling that old 8" out of the bush from an old mining camp (previous post). ![]()
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