Process this sluiced material with a gold pan or other fine gold recovery product. Rinse any excess gravel that remains in the sluice into container. Inspect for pickers or nuggets first, then carefully roll up the riffle matting or miner's moss and wash into the container at the end of the sluice. Learn how a Suction Nozzle works on a Gold Dredge.Īfter sucking up material for a while, place a wide tray, bucket or large gold pan at the end of the sluice. A suction dredge engine is air cooled and adds nothing to the water. The average size of a dredge engine is 5 horsepower- about the same size that powers lawnmowers. The sluice filters out all heavy metals, including mercury, and returns the clean gravel to the river. The size of a gold dredge (1.5 inch, 2 inch, etc.) is determined by the diameter of the suction hose- the larger diameter the hose, the more material can be processed.Ī floating gold dredge is essentially a floating sluicebox that uses an engine and pump to create a vacuum and send gravel (hopefully gold-bearing gravel!) into the sluice box suspended between the two pontoons. Plus, advances in technology allow a small surface gold dredge to be carried by a single person to a remote stream or river and profitably process gold-bearing material.Ī suction dredge used along the shoreline works like a large vacuum cleaner by sucking up underwater gold-bearing material like rocks, gravel, sand, and dirt and forcing it through a highbanker or power sluice that is capable of recovering very fine particles of gold. Sandy or gravel river banks contain large deposits of alluvial gold (loose pieces of gold or gold-bearing sand), and dredging is a great way to recover this gold. Some of it is available seasonally or as needed.Over the last 10 years or so, dredging has resurfaced as a popular form of gold mining (except in California where dredging is currently banned). From dredge hoses, dredge nozzle tips, header box adapters, to miner's moss and grooved matting we keep much of this stuff in stock at all times. We provide a variety of dredging accessories that can be used to enhance your dredge's ability to capture gold. Suction dredges range in size from backpacker dredges which are about two feet long to some that are about three feet long. If that’s too cumbersome we also have dredges that aren’t connected to buckets by a hose. We have some designed to pump right into a bucket. High Plains Prospectors stocks a variety of handheld suction dredges in different sizes. Be sure not to undermine the foundation of the boulder you’re dredging, or the force of the water could push it over on you. Shovels end up losing a lot of material under water with each scoop whereas the hand dredge sucks it all out. Handheld suction dredges are great to get under the downstream side of boulders in rivers or streams where it’s very difficult to dig with a shovel. Be sure to use a gold pan to pan out some paydirt first to see what size gold is in the area so you can select the right gold classifier. Once you get your bucket filled you can choose to classify down the material using classifiers or run it as it is. It’s best to fill the bucket to about half full of paydirt to ensure the handle stays intact and you can move it! One common mistake made by prospectors is to dredge up so much material that they can no longer lift the bucket to move it, or the handle rips out of the bucket. As you fill the bucket, you’ll end up with more water than material, but don’t worry, as you continue to dredge the material will displace the water and the bucket will fill up. You simply use the gold dredge to suck up the material and squirt it out into a five-gallon bucket for further processing. Gold dredges are used to suck material out of cracks in bedrock under water, crevices in between boulders and from other hard-to-reach places under water. Gold likes to settle in cracks and crevices in creek and riverbeds and without a hand dredge, you could be missing a lot of valuable material. One of the most exciting ways to gather gold is by dredging for it.
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