On the other hand, a trommel has every thing a high-banker has, plus the spinning tube the feed material passes through. Simply because there is not much physical agitation or pulverizing impacts involved in a high-banker set up, other than gravity fall & the force of water from the spray bars effect. Simply because they hit the grizzly inside the high-banker feed slot like rocks, or dough ball clumps & slide out the grizzly exit as oversize before they have time to totally disintegrate. I have seen some clay like material that will disintegrate into silt in contact with high pressure water & slight agitation.īut, generally a high-banker will not usually handle big chunks of cement like hard pan clay or large hard balls of sticky plastic like clay very well. The "Y" on my pump is made by Keene, but you can make one out of pipe fittings.Ī lot depends on the type of gold bearing clay present. Here's a picture of my dredge, if you look close you can see 3 hoses coming from the pump, the dark gray hose is the pickup/foot valve inlet hose, the lighter gray hose is the high pressure hose going to the jet tube, the white hose is my 1" blaster hose, you can also see the "Y" on the output of the pump that has the high pressure hose and the blaster hose connected to it, the blaster hose is as long as the suction hose so I can have it and the suction hose under water with me, the blaster hose with it's nozzle to help break up hardpack gravel, clay and to blast out material in cracks and I suck up everything that the blaster hose loosens up with my suction hose. What I'm talking about is a hose that comes off of a "T" or much better a "Y" on the high pressure output of your pump, basically it's a small firehose with a control valve at the nozzle.
No that is a Hydroforce nozzle, it is used out of the water, it pumps water out onto dry material so you can dredge/suck up dry material, here's a video of Chuck Lassiter the gentleman that makes the Hydroforce nozzle showing how it works.
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