My sister ran into a fossiker when out camping who was having an issue with tiny shot while finish panning. He was sucking the shot into his snuffer bottle when trying to collect the gold. Any suggestions? I have a feeling he's not the first person to be annoyed by this.
Does any place still make and sell the rubber Knudsen bowl liner? Google seems to just lead to a bunch of spam pages. I acquired an old bowl and the previous owner thought there was a store in Reno that made or sold them but I haven't had any luck locating said store.
Also semi-related I am rebuilding an old jig, never used one before, and I was wondering what people use for shot? Do you just buy steel shot in bulk like from an ammo place or is there something cheaper and better to use specific to jigs? I see tungsten shot available for jigs but it's the same density as gold more or less so I'm having trouble seeing how that would work, especially if I want to save the black sands too. I'm curious what people use here?
I ran 2 Ozt of my -50 mesh, black sand concentrate through the Blue Bowl. It came out to .5 gram. This was 2 oz dry concentrate off the top of the container, I suspect the bottom my be richer after all the jarring around for the past 2 weeks. I'll send the Blue Bowl tailings and about a couple lbs of concentrates to Rege in PA to see what his Miller Table can do. If I could fill the back of my truck with this stuff it might be worth something, but as it stands not really a game changer.
Still waiting on Rokon parts, then back to Gold Country. I've got a new plan, of course. 118 degrees here in Sunny Yuma tomorrow, but it's a dry heat. Yeah great!
By Jim in Idaho
I've been trying to come up with a unit to recover gems dry, but finally realized that the "granular convection" problem can't be defeated. In the process of building and trying various ideas, I came up with this unit. While the dry recovery of gems requires some very tight classifying, and thus isn't practical, I tried it for gold, and was simply amazed at its abilities for heavy metals. I have tried it on all sorts of raw materials, running bank feed at roughly 2" minus, and have yet to find a material it doesn't work on to one extent or another.
I ran it dry...no water, on damp material at the LDMA Blue Bucket outing near Baker, Oregon a few weeks ago, and recovered flour and black sand from old tailings from previous outings. Running wet, the day before, on new material I recovered very near 100% on black sand and gold in front of several witnesses. They suggested re-running the tails, and zero black sand, or gold was found. Last weekend I attended a local club outing at Salmon, Idaho. The material was a heavy clay with lots of rocks....not a fun material, at all. At the common dig, one of the guys next to me, running a highbanker, mentioned that my little unit was handling the clay really well. I was the only person running 2" minus directly into the machine, and the rocks were agitating the material so the clay broke down, and the rocks were mostly clean before they went out to tails. The day prior to the common dig I went down to the locale the common material had been hauled from, and ran the material dry. This was a nasty, damp material. I expected nothing and was surprised to see both black sand and gold when I did the cleanup. Certainly I lost quite a bit, but any recovery working dry from damp material is an accomplishment. This unit works wet or dry. Very little dust running dry. Very low water requirement when running wet...roughly 50 gallons/hour.
The full utility US Patent has been applied for.
You can see the prototype running at Bonanza Bar on the Snake, along with pics of the recovery here:
Hi there RR, All this gadget is doing is mechanically classifying material into a gold pan. Nothing you couldn't do with a manual classifier over your gold pan which you could possibly get away with. I know with my sluice boxing I made & use a bucket classifier than can process a lot of material pretty quickly to feed down the box.
Clean up time
Good luck out there