![]() I posted this awhile back on a different forum and didn't realize I had printed it out. View our collection of gold dredging dvd's and books. Home > Gold Prospecting - FREE TIPS > How do Suction Gold Dredges Work? > Gold DREDGES for Sale - Keene > Diving Equipment > Proline Gold Dredges > Dredging for Gold Info > Buying a Used Gold Dredge - Tips There are a couple of web sites on how to build a dredge or other mining equipment, also studying some of the professional ones like keen can help you design your own.Home > Gold DREDGES for Sale - Keene > Diving Equipment > Proline Gold Dredges > Dredging for Gold Info > Buying a Used Gold Dredge - Tips aluminum sheet metal is easy to bend for the sluice box if you have access to a sheet metal brake, if not a simple metal brake can be constructed from boards clamps and large door hinges, angle iron can be welded to form the riffles and its frame, an outdoor carpet (looks like grass) under the riffle frame can also help to catch gold. Long toms,or a sluice box can be made from wood or metal, there are different ways the riffle's can be made, it can be as simple as a wood slat frame, or a little more complicated to build as angled iron, welded on a frame, these later riffles are a more proven design, I have built several dredges, nothing real fancy but they work for me,made some jet flares, and I have even bent and welded up my own suction nozzles. If you have specific questions, ask and i and others will try to answer them, though tis the season and it may be a few days til i get back. Volume,thus increasing your intake of the yellow metal inlarger pieces at the end of the day. ![]() And of course as you go up in size you increase the weight of the motor/pump/air pump and need larger pontoons to keep the sluice floating when you are running, but you can move a lot more material Most of the little backpack style dredges i retail about only 60- 65 pounds total weight but the drawback is its a 2 inch and 2.5 inch and though its good for sampling if you have to go very deep, there is no air onboard, and not enough power to pull the gravels if they are very deep, but you do not lose as much fine gold with some of them,basiclly there is not much difference between highbnaker conversions and the smaller backpack style dredges with the exception of using a flare attachment design and single hose over double hose length. You can build a dredge on legs, or floation, and the floatation can be inner tubes to a pontoon boat, the bigger boat has its pros and cons same as one you just set up on the bank. Ive run a dredge and shut down after 30-45 minutes and my riffles were full of black sands and gold, and ran all day long 4-8 hours and clean up was the same, no more fine gold than short runs in the same material.makes me wonder how much ive lost over time. there are various designs of sluices to remedy this problem but they all still lose much of that fine gold. When you increase hose diameter size by one inch you can move 4 times the material from that next size down, however as the hose size increases so do the size of rocks you pick up and run over your sluice and the higher volume of water it takes to move them off, as that happens your finer gold will not always settle into your sluice and goes over the end of the dredge, so increased volume of material sometimes gives up that fine gold which really does add up over time. The "jet flare" design uses a short hose to feed water to the venturi and flare /crash box, as opposed to the older style using a long hose running out to the suction nozzle which adds both weight and expense as these hoses need to be pressure rated and not collapse, those pictures above show clearly a nice yellow dredge pump. ![]() we will see what it will eat, but right now i have no trouble feeding it a five gallon bucket in 5-7 minutes with a large trowel.Ī suction dredge needs to have a specific pump on it, made for pressure and volume, trash pumps just wont produce the pressure needed for sucking up gravels as well as a dredge pump does. Such would be a great candidate for a Gold Cube which uses about 1100 gallon per hour 12 volt pump and can process from what the inventors claim up to 1000 pounds of classified material per hour or about a half a yard for such a little tool, i have not had that kind of volume yet to try to run on a timed basis, though i hope to this summer yet. From what i read your friend has rices sized nuggets/pickers which would make them able to pass through about 10-12 mesh, for the most part and an 8 mesh screen most all the time unless its really long wire type gold. While i have not built my own dredge, i have run a couple and have thought about building one a time or two or improving an existing one.
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