How To Set Up a Sluice Box : Complete Guide (Angle, Water Flow, Water Speed)
Jun 08, · Here I make my first gold sluice out of a truck took box lid. Here I make my first gold sluice out of a truck took box chesapeakecharge.com: Puddin. During the early gold rush days, sluice boxes were generally constructed with slats of wood with nothing else to capture the gold. It did the job, but a lot of gold was missed, especially the fine stuff. All commercially built sluice boxes today utilize some sort of material underneath the riffles that is designed to aid in the capture of gold.
A sluice box indeed is a great way of prospecting for gold. There is no doubt that having a sluice box is a great way of finding more gold and work through more material. However, as with everything, there are some technicalities you must know to make the most out of your sluice box. If run recklessly, you risk losing a lot of the gold you have been digging so hard for. So, how do you set up a sluice box? A sluice box should be set up in a creek or river with a steady flow of water, so that the lighter materials can get flushed out of the sluice box, while the heavier gold and black sands are trapped.
As a general rule of thumb, it should slope around degrees to function efficiently. To prevent the sluice box from floating away, you may place a heavy rock on top of it. While this is the short and correct answer, there are some more details that are worth considering when setting up your very own sluice box.
A sluice box contains several traps across the length of its channel that are designed to disrupt the flow of water in various ways. This is primarily done to slow down the flow so that the gold drops to the bottom, or to create vortices of varying kinds that sort out the heavier materials.
Riffles come in various forms, but the most common type is the Hungarian or Lazy L Riffle type. In short, what does safe mode mean on my sony xperia operates by the following main principle:.
Sometimes very fine gold particles might escape the riffles. Due to this, many sluice boxes are equipped with some type of matting or carpet that is design to capture the gold as it slides along its surface. It consists of woven fibers and as its name suggests, it resembles natural moss. Miners moss, as well as natural moss, often manages to catch the really fine gold, as it falls into the fibers and gets trapped.
For example, having too much water coming through the sluice will cause a lot of the gold to get flushed out, which is something we want to avoid. To make it easier to follow, we have broken down the process into a couple of easy-to-follow what is a size 8 mens shoe in european sizes. To operate as efficiently as possible, a sluice box requires a steady flow of water through the box.
This means that you need to place it in a rather fast-moving stream or creek, to ensure that there is enough water to remove the lighter material. Sometimes just placing a couple of rocks around the entrance of the sluice file extension docx how to open do the trick, and provide just the extra water that is needed.
Tip: A nice trick when building how to remove conservatory roof panels own funnel is to bring a sheet of thin plastic or a couple of rice bags, and use it to prevent the water from running through the barrier you just built.
Make sure that the sluice box is leveled sidewise. You want the flow of water to be even across the riffles and mattings to ensure optimum performance.
Lengthwisethe sluice box should be angled around degrees to allow pebbles and other materials to pass through easily. Another commonly used rule of thumb is that the sluice box should drop 1 inch for each foot of sluice.
Now, one thing that confuses many is how much water they should have going through the sluice. Having the right amount of water running through the sluice is critical. Too much, and you will have the fine gold running right through the sluice. Too little, and lighter materials will clog the riffles, rendering them useless. In short, you should have enough water flowing through the sluice to keep it clean, and the riffles should not become buried under the sand.
If there is white froth as the water flows over the riffles the flow is too violent and needs to be dampened. Depending on what happens when water breaks in pregnancy sluice box, the amount of water that is needed will vary. Having shorter riffles means that less water is needed to make them function properly, whereas higher riffles require more water.
Obviously, how long to boil clams and mussels exact number of seconds depends on the length of the sluice, but you get the idea. How to build a gold sluice lighter materials should move fairly quickly through the sluice! When the water flow is right, the recovery rate of most sluice boxes will be really satisfactory. However, operating the device is a sensible manner will also have a big impact on the results you get.
In order to retain as much gold as possible when using your sluice box, there are a couple of things you need to be aware of. To make it as easy as possible for you, we have provided clear instructions below:. Before throwing gravel onto the sluice, you should classify the material. Basically, this means that you run the gravel through a net to remove all rocks and stones above a certain size.
Classifying the material is essential, as having too big pieces of rock in the sluice will disturb the flow of water, clog the sluice, and cause excessive wear on the riffles and mattings. How to build a gold sluice classify, you just pour the material into the classifier. All the material that is smaller than the classifier size will fall through, while the larger pieces stay in the classifier.
If you are working with really dry material, you can just twist and turn the classifier to get the rocks clean from dirt and sand.
Once the rocks are clean, you just throw them away. If you are in nugget-rich grounds, you want to be careful not to throw away any nuggets in the process! This basically means that you should ensure that all the material is soaked and loosened by the water and is turned into a slurry. If the material is not stratified properly, the fine gold might just run straight through the sluice and back to the river. Now rinse the crevices and traps of the sluice and pour what is the purpose of reading and writing concentrate into a bucket.
If your sluice box is small enough to go into the bucket you could just fill it up with water and submerge the sluice into it. The final step then is to separate the gold from the black sand. Most times you use a gold pan and swirl the material gently with some water in it.
We recommend that you take a look at our complete guide to separating gold from black sand if you want to learn more about how to proceed from here! Not emptying the sluice too often is all about efficiency. If you let it run for longer, you will not waste your time on unnecessary cleanup. Make sure to break up any clay clogs and ensure that the gravel is washed carefully. Just run through some gold-bearing material through the sluice, and then pan the tailings.
If there is no gold to be found, you can rest assured that the sluice box is set up correctly. A sluice box is a highly efficient gold recovery device that is used by beginners as well as experienced miners to speed up the recovery process. The most critical aspect to keep in mind when setting up a sluice box is the amount and speed of the water that goes through it.
However, to achieve a respectable retention rate you also need to ensure to not be reckless when feeding the sluice box. As you already know by now, this involves not dumping more material than can be soaked thoroughly, as well as not leaving the sluice box without new material for longer periods of time! Finding real, natural gold is a dream come true for many people. Many people make an attempt to do some panning or metal detecting at some randomly chosen location, most often to no avail.
If you have decided to upgrade from a gold pan to a sluice box you're far from alone. A sluice box is one of the best upgrades you can make as it will help you process many times the streambed We also participate in other affiliate programs which compensate us for referring traffic.
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Step 1: Planning the Sluice Box
Oct 15, · Cheap Sluice Box That GETS GOLD Step 1: The Metal. Step 2: Ribbed Matting. Step 3: The Grating. Step 4: Ribbed Carpet.. Step 5: Holes and Holding It All in Place. Step 6: SAFETY. Step 7: NOW GO GIT SOM GOLD!!!. Did you make this project? . Step 2: Level the sluice box and stabilize. Make sure that the sluice box is leveled sidewise. You want the flow of water to be even across the riffles and mattings to ensure optimum performance. Lengthwise, the sluice box should be angled around degrees to .
So what is a sluice box and how does it work? Basically, a sluice box is a long, narrow box with a series of obstructions called riffles in it. If the sluice is placed in a running stream of water, and gold-bearing gravel and dirt is fed into the upstream side, the heavy minerals, including gold, get caught in the eddies created by the riffles, and the bulk of the lighter material gets washed through the box and out the end.
Over time, as more and more material is fed through the sluice, more and more gold builds up in it. A sluice box can process much more material, much more quickly than a person, or even a team of people can pan material with gold pans.
I drew up a simple plan for a cradle that would sit on top of a plastic storage bin full of water. The cradle would hold the sluice and allow me to adjust the angle of tilt.
Water would be pumped out of the bin to the top of the sluice. Water and debris would fall back into the bin at the bottom of the sluice. This would be great! I'd be able to use it in the field where there was limited water available. I'd designed a recirculating sluice or highbanker.
I couldn't wait to build it. The sluice itself is just a simple three-sided box. I decided to keep it simple and cheap, so I made it out if wood. I used a 1 x 6 pine board 36 inches long for the base and 1 x 3's for the sides. It is all held together with Gorilla Glue and screws. I marked out the location where the riffles would be. I also built and attached a spraybar to spray water into the top of the sluice. More on all this in later steps. It is all held together with Gorilla Glue, screws and nails.
The cradle that holds the sluice over the tub is constructed similarly. It is made from 1 X 4 pieces of pine glued and screwed together. Notches cut into the cradle allow it to lock onto the rim of a plastic storage bin.
I have two sets of notches in the cradle, which allows it to fit on two different size bins. A 1 X 6 piece of wood is mounted diagonally at one end of the cradle to act as a splash board to direct water falling out of the lower end of the sluice back into the tub. The wood of the sluice will swell when it gets wet. If you don't provide sufficient clearance, the sluice and cradle can lock together. I found that out the hard way in an earlier version of the sluice.
You can see the entire evolution of this project on my web site. The cradle has two hinge points made of heavy sheet aluminum screwed onto it. This allows the sluice to pivot up and down to adjust the angle of fall. I saw an old bilge pump at a yard sale. It looks pretty beat up, but it works great. You can also find pumps like this at boating supply stores and on Ebay.
I glued a PVC fitting on the outlet of the pump so I could attach a hose barb and a 1 in. ID hose. I carry some sealed lead-acid batteries into the field with me to power the pump. They last a for a few hours on a good charge. The photo below shows the spraybar in action.
It is made from some 1in PVC pipe with lots of holes drilled in the bottom to allow for water flow. A hose connects one end of the spraybar with the bilge pump through a valve to regulate the water flow. The other end is just capped off. I attached the spraybar to the top of the sluice with some steel strapping and screws. Below is a photo of an early test run. My biggest challenge on this build was making the riffles for the sluice out of steel angle stock.
I am an old carpenter. I can make anything out of wood. Metalworking though is more of a challenge for me. So I hesitated for a while before taking the plunge and using steel. But I decided it was high time I learned how to weld anyway. My intent was to use the flat stock as rails on either side of the sluice and weld the angle stock between them to make riffles.
The entire steel riffle assembly could then be lifted out of the sluice during cleanups. I settled on 6 riffles, 4 inches apart and starting 4 inches from the bottom end of the sluice. I cut up the steel pieces without too much difficulty, even though I only had a hacksaw for the job.
I don't have a lot of metal working tools. I built a short section of sluice out of scrap lumber to serve as a jig for welding the pieces together. I used a borrowed welder to weld the pieces together. My welds are ugly I need more practice but they seem strong enough. I also welded on two angled pieces in the middle of the riffle assembly to serve as anchor points for holding it in the sluice. Not bad for a welding newbie.
The third photo shows the nearly finished riffle assembly, looking like a mini ladder. I still needed to trim the top hold-down ear back a little. After early tests with the sluice, I found I needed to weld on another flat piece at the top end of the riffle assembly 4th photo to hold down the mesh and ribbed matting that would go under the riffles. More about those later. The last photo below shows how the riffle tray is held in the sluice. There are two right-angle "ears" welded onto the center of the riffle tray.
They have passage holes drilled in them to fit over hanger bolts in the side walls of the sluice. Wing-nuts hold them in place. It's a good system. The only challenge is not losing the wing-nuts when disassembling the sluice for cleanups. Early sluice boxes just had riffles in them. They caught a lot of gold, but some of the finer gold tended to wash right through them.
The old-time prospectors eventually learned the trick of lining the slick bottoms of their sluice boxes with materials that would capture more of the fine gold. Some materials commonly used are indoor-outdoor carpeting, expanded metal mesh, ribbed matting, and a specialty product called miner's moss, designed especially for use in sluice boxes.
I pondered what to use. Miner's moss is supposed to really catch the gold. However, it is fairly expensive, and it is also very thick, I would have had to redesign the sluice with taller sides to use it. Easier and cheaper options were carpet, ribbed matting, and expanded mesh. I found some ribbed rubber matting cheap on Ebay , and bought a roll of it. It was easy to cut down to the width of the sluice. I went to the local homecenter store looking for expanded steel mesh.
I found it in big 4 X 8 foot sheets that were kind of pricey, and looked like a nightmare to trim down to size. Just down the isle I noticed rolls of plastic mesh made to keep leaves out of rain gutters. It looked like it exactly the same shape as the expanded metal mesh, but was cheaper, and would be much easier to cut. I bought a roll of it. It worked great. The first photo below shows the pieces of ribbed matting and plastic mesh cut to the length and width of the sluice box. The second photo shows them installed under the riffles in the sluice.
Now my sluice box should catch almost all the gold that passes through it. The sluice was essentially finished at this point. However, I couldn't stop tinkering. I decided to do some refinements. These are optional, and not absolutely necessary to make the sluice work.
You don't need to do them if you want to keep things simple and easy. Me though, I just can't leave well enough alone. The first refinement was a new way to adjust the angle of fall of the sluice. I had been adjusting the angle of the sluice by just jamming whatever was handy between the sluice and the cradle, and sliding it back and forth to find the right angle.
This worked OK, but I decided to get fancy.