lp13
do you know how many yards per hour was being run thru this sluce ? looks like it might be on a ocean dredge ? do you have anyone using your sluice behind a shaker screen or trommel ? and how does it handle the increased volume ?
bill/cr
Increased material volume is not much of a problem. It handled the Nome black sands pretty well. Not sure on the volume they ran there, but we have run 5 yards per hour without the sluice loading up and losing gold. I have never run it to the max yet, but it's looking like (depending on material of course), the Gold Well 12" model can handle somewhere around 8 or 9 yards per hour under optimum conditions. I do know that it kept up with the material processing on the AU Grabber, as it had to process all the material daily that the main sluices processed. 3 feet wide, 1 foot deep. And as I understand it, in the end, final configuration, 3 Gold Well's were not used or needed for that task. (Hey Hank if you read this and would, why don't you fill in some of these details.)
Water like shown in the picture becomes a problem if you don't slow the velocity down before going across the sluice. The Gold Well really doesn't need very much water depth as it won't 'scour' like a regular sluice can. And a lot more volume is fine, but you can't blast it with a fire hose. Water velocity is the factor that needs to be kept in mind with a Gold Well. In that photo it was being run on the AU Grabber (huge ocean dredge, one of the biggest) in Nome, AK this summer with excellent results, however NOT in the configuration shown as the pump they had was humongous and was designed for their normal style sluice.
They ended up as I understand it, dumping all the output from the main sluice into a bin before going over the side, then sucked that out of the bin and pumped it through our sluice with appropriate water flow. Shown in the picture is my brother who was there (whom I communicate very little with and thus know too little also), and that was from a 4 hour run, the gold captured as I understand it that would have been blown back over the side from the main sluice if the Gold Well had not been inline in the process.
Yes, there are people using them behind a large New Age trommel as well as home made ones with no issues. It really doesn't matter the method of input. I am almost done with the dredge crash box for these units, as well as a nifty unique new stand/cart for dragging sluices around in the boonies rather than carrying them on your back (for those that have to pack in), so I am trying to accommodate any desired method of input.
People who have seen or use my sluice are amazed at the throughput on it, and a lot of them think they need a big one, yet, when they find out how much a Gold Well can process, they soon realize they don't need such a huge one after all. But, for those that really DO need something big, we have a countersunk screws option (flat head screws used on the sides after we countersink them), that allows them to be ganged side by side, and for those wanting a longer one, they can be daisy-chained, one sluice dumping into the next, either a simple frame made to set them in, or simply using some kind of fast release clamps to hold them in the desired configuration while in use.
There is a video that one of my customers did, that shows them running a few buckets (the last of 20), in Happy Camp this summer. They only classified to 1" (tbh I never classify at all myself when I go out, I'm too lazy

and put those 20 buckets through a 12" in 14 minutes. But if you watch the video carefully, you will see that he's pouring out of the bucket down the center of the sluice and so only 60% of the sluice is really being utilized, as well, I can tell by watching it that the sluice could handle probably another 15% more material as he is underfeeding it. Then too is the fact that he walks away to get more buckets, during which time there is nothing going through the sluice. So you do the math, he's way under max, but that puts it easily up in the 120 - 180 buckets per hour category.
Well I hope that answered your question satisfactorily Bill. If not let me know.