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charlene91
20:37:56 Sun
Oct 21 2012

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new to dredging input please

HI YOU ALL RATHER THEN RENTING A EXCATOR A LONG WAYS FROM TOWN WHY NOT USE A FOUR INCH SUCTION NOZZLE AND YES I SAID A SUCTION NOZZLE WITH A TWO INCH PRESSURE HOSE AND A ONE INCH PRESSURE LINE TO PUT WATER ON THE MATERIAL AND USEING THE SUCTION NOZZLE PUSH THE MATERIAL UP ABOUT TWENTY FEET TO A HIGH BANKER ...THE MATERIAL IS DRY SO I WOULD BE DOING DRY LAND DREDGING MY PUMP WILL BE A 16 HORSE POWER ENGINE TURNING A KEENE 355 PUTTING OUT 450 GALLONS /MINUTE ..I HAVE WORKED THIS DIRT BEFORE WITH MY TROMMEL AND A LOT OF SHOVELING AND THE USE OF A EXCATERTOR TO DIG AND PILE THE DIRT AND THEN SHOVEL INTO MY TROMMEL THE DIRT IS ABOUT 25 DOLLARS PER YARD PAY ... ALL INPUT PLEASE FROM MY RESEARCH I THINK IT WOULD WORK ..BUT I DONOT KNOW MUCH ABOUT DREDGING ..PLEASE REMEMBER I AM THINKING A SUCTION NOZZLE WHICH ONLY SUCKS ABOUT 18 INCHS AND NOT A DREDGE NOZZLE THANK YOU ALL FOR YOUR TIME CHARLENE

  
overtheedge
22:02:34 Sun
Oct 21 2012

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Re: new to dredging input please

What is the size breakdown on the material to be worked?
What is the largest probable size of the gold to be recovered and what is the mesh range that the majority falls into?
Pile shape/dimensions especially height? This one has a peculiar reason.

High piles afford the opportunity to shovel/push material downhill. At the lower end sits a wet classifier. Move just the classifieds to the recovery circuit. Result; substantially increased productivity (yards moved) until pile gets too low to use this idea. Then you are back to where you started.

I have dredges, but not loads of experience. All of it in longarm water depth and shallower. Most in 6" or shallower as well as some dry-landing. Oh, my largest is 2.5", but I use the 2" most of the time.

Water in the hole is the biggy. No water or it keeps running out loses suction. From my limited experience it appears that the suction hose really needs to be cleared of material before you shove in a slug of air.

But like I said, my experience base is limited. I think you have a valid idea to consider. Perhaps someone with a combo-rig will chime in. They're the ones with experience doing what you are considering.
eric


  
klondike_jake
23:48:31 Sun
Oct 28 2012

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Re: new to dredging input please

your going to need a bigger dredge.

  
charlene91
07:55:15 Mon
Oct 29 2012

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Re: new to dredging input please

i WILL BE CLASSIFING DOWN TO 3/8 THE GOLD SIZE IS THE BIGGEST I HAVE GOTTEN IS NO. 12 MESH THE MATERIAL IS LIKE CAT LITTLE

  
jcazgoldchaser
21:05:47 Tue
Oct 30 2012

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Re: new to dredging input please


  

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