Next decide where how far down the plate the wanted heavies fade out to unwanted heavies and this is where you will want to wash the bottom half down into the trough and into a pail placed at the end of the trough. Next rotate the aluminum angle stopper located on the side rail at the bottom end of the plate into the down position to block the material that may wash down the edge of the side rail while tipping the sluice up. To do a clean up first allow the unit to sit a couple minutes to allow the water to drain as much as possible. Once you have it set, then proceed feeding it material. If so, reduce water volume or sluice angle. The top row may clean out to about ¼ full after several minutes but never wash clean completely. Too much water speed will result in the top row being washed clean after several minutes of running white water (clean water with-out material). IMPORTANT!! Not enough water speed will result in gold being washed out. If the material on top of the Vortex wells is not bouncing around slightly then water volume or sluice angle must be increased. Upon observation of the wells the material at the top of the wells should be bouncing around and the wells should be about 3/4 full of heavies such as black sands etc., (lighter material will not stay in wells so it is important you make your observations only after you have processed enough material to get at least the top 2 rows built up with heavies such as black sands etc.). Feed enough material though the system until you have a build up of heavies in the wells, stop feeding material and wait till the water runs clear. If there is not enough water speed there will be a hopping of the water as it exits the vortex wells, increase water volume until the hop is mostly gone. The water should be flowing fairly smoothly down the plate. Adjust water volume until there is about 3/8 inch of water above the top surface of the plate. Setup Longtom so it is level side to side and at 7 degrees angle. A good starting point is about 7 degrees as this will cover the most common types of material. The average water volume required for the widths of sluices are as follows:Īn operating angle of 5 to 15 degrees will cover all the different types of material that may processed. 3/8 of an inch above the surface of the Vortex plate. The average angle of operation is 6 to 8 degrees with a water depth of approximately. The steeper the angle the less water volume needed to acquire the correct water speed needed for proper operation. The water speed is the most important factor when operating the sluice system. The set-up angle and water volume will determine the water speed. The water volume is determined by the width and operating angle of the system. The Vortex Drop Riffle sluice system has a operating angle range of 5 to 15 degrees. You must try various water speeds to find a suitable speed that will provide the best result for the type of material being processed. Faster water speed can be used to provide a cleaner result but losses will be slightly higher. Too much water speed and the Vortex wells will be washed clean or have less material in them. This will cause the wanted heavies to skip over the Vortex wells and out of the system. Too little water speed and the material will not be bouncing around and the Vortex wells will be fuller. The Vortex wells will appear to be about 3/4 full with material. ![]() With the correct water speed and setup angle you should see the material on the top of the Vortex wells bouncing around while running clean water and no material (white water). The Vortex wells work by the helix spirals directing a certain amount of water down into the wells to keep the material on the top of the Vortex wells in motion allowing the heaviest particles to work their way to the bottom of the wells. There is usually about a four-row spread working its way down the plate as the rows get filled up with the heaviest material. This means that the heaviest materials will be caught at the top end of the system and work their way to the bottom of the Vortex wells and drop riffles, as the top rows fill up with the heaviest material the process will move down the system. ![]() This does not mean all the material being caught will be the same material. This material will be the heaviest of the materials being fed through the system. A 12-inch x 12-inch section of Vortex plate will hold approximately 1 cup of material in its Vortex wells and drop riffles when being cleaned out. The heaviest particles will work their way to the bottom of the Vortex wells / drop riffles and build up thus pushing out the lighter particles. This meaning it will capture and concentrate the heaviest particles of the material being fed into the system. The Vortex Drop Riffle Sluice System is a heavy particle concentration system.
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