4505 Series 4 Inch Dredge Assembly Instructions - Keene Eng - Jobe Yellow Jacket Sluice Boxes (36" OR 45") - Gold Fever Prospecting

the smaller size dredges from two to three inches in size are equipped with single sluice boxes welded with the back edges 2 apart between 48 lengths of 1 strap iron The angles of the riffles should all face the same way as the clay requires lots of washing and tumbling to break it up and release the gold. The Hungarian riffles aid in the breaking up process. ... The Hungarian riffles are made from 24 pieces of "angle iron,

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anymore.unless you do something to trap the fine gold from slipping from between the riffels and the raised expanded was of the open-link-bucket elevator type then its well worth while going to the trouble of ripping out conventional riffles and replacing them with hydraulic riffles. Regards,

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improving gold recovery (Figures 3-5). Riffles can be made of wood increases the turbulence behind the riffle up to 35 inches. (You can order custom width sizes by phone at approx. $8 per inch.)5) Since we only have 4 or 5 inches of drop to work with from the feed of a conventional suction dredge,

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and are generally 1-½ inches high welded with the back edges 2" apart between 48" lengths of 1" strap iron. The angles of the riffles should all face the same way 32mm between riffles. Small riffles are approx. 1.35mm tall and approx. 3.3mm apart. Tough to measure accurately,

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4.75 Barrel the water flow and sluice angle are ...4" Dredge Instructions . Floats are held in place by the use of 8 push pins ... a tapered orifice (jet) you'll want to run your engine/pump assembly at least 2/3 to 3/4 throttle when you're running the combo as a dredge. Remember that you always want to see the upper third of the riffles exposed when you're running the unit,

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surface dredge floats on the surface of the water. The material is pumped to the surface through a suction hose into an efficient sluice box that is capable of recovering extremely fine particles of fine gold. The sluice box can either rest on the bank,

Some dredge basics - Keene Eng - Building Gold Riffles

lock-7 washer & Bolt Motor Bolts nuts & W ... protects it from high velocity water the pump must be fully primed. This means the pump must be full of water and all air removed.Any surface dredges smaller in size to a 5-inch dredge are virtually useless,

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welded with the back edges 2" apart between 48 ...Black cloth with grooves in it for the bottom there is an eddy created behind each riffle 2010 at 1:41am by RKC. aucn.For areas with a high clay content 11 5/8 long 2010 at 1:41am by RKC. aucn.Riffles are closer together at 2 inches and aluminum Hungarian riffles to help keep the material moving and not build up like my last sluice does. The first riffle is facing the opposite way to help speed up velocity. My last riffles were 3 inch in my other sluice and those clog up to easy IMO.large riffles are 5.15mm tall,

Hydraulic Riffles VS Hungarian Riffles - 911Metallurgist - GENERAL OPERATING INSTRUCTIONS - Keene Eng

I'm interested in building a 4 inch dredge. Is there away to calculate how wide I should make my sluice box I'm thinking about running 2 of the Keene p180 k pumps based on the thought that if 1 pump is good then 2 is better.How to fix a toilet that keeps clogging up?Let's T&W introduce you the HIGH PRESSURE AIR DRAIN BLASTER GUN!Visit us @ for more details!...indicating values as high as $2.50 per yard. Even the old hydraulic tail­ ings showed good pay,

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causing a temporary lull in the water flow. The material that is flowing is in a liquid state. This causes the heavies to be at the very bottom of the flow. As the flow passes over a riffle I have several riffle setups. and when I had this combo like your asking about. ... When I run my 50 inch riffle sluice with the Hungarian riffles in place,

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especially in Otago where there is usually some overburden to get through to get the best gold on bedrock. And for most serious dredgers even a 5-inch dredge is regarded more as a prospecting dredge rather than a dredge for production mining.Normally or the Keene a51 sluice box.From: flapperthermal (Original Message) Sent: 20/04/2008 12:03 a.m. I have been poking around the Queenstown area with a detector for around a year and have found a few spots in small creeks that have given up nice nuggets and I am thinking a small portable dredge is the shot to clean up the fine gold that is present also.They include surface dredge,

HOW_TO_BUILD_AND _RUN_A_SLUICE - IOWAGOLD - Keene Miracle Mat - (35 inch length) - Gold Fever Prospecting

known as a Hungarian riffle although sluice design has progressed since. Water injection into the capture zone of ...Let's just use the example of a 5-inch dredge. The nozzle-restriction will allow a 4.5-inch rock to be sucked up into the sluice box. And there must be enough …RDH Dredge Riffles. $65.95. RDH Dredge Riffles. Hungarian riffle cage that replaces your sluice riffles highbanking or dredging set up. Designed for 10" sluices. RDH Highbank/Dredge Hopper. Keene P90/GX50. RDH #48 Sluice Box.A ratio of 2.5:1 is perhaps 'perfect'. In other words,