how to build a highbanker dredge combo how to make a slosh box

There is every probability that unless you are feeding straight sand off a beach, your actual feed for 2/3 CY per hour (18 cubic feet) bank-run might be as low as 2-3 cubic feet per hour.

So knowing the character of the material and the required maximum feed classification will give you the actual feed in cubic. You might also be interested to know we have recently performed a review of the very best sluice box as of 2021 and beyond. This makes recovery of small gold drop substantially due to uncontrolled turbulence caused by over-size material. Grossly over-size requires more water at a higher velocity to clear it from the sluice. The reason behind this is why run grossly over-size not-gold through the sluice? Now we have to know the probable size range of the gold in your deposit. Large cobbles and boulders (>12-15cm) will slow your feed rate considerably. Only if the person is young, in excellent shape and the material is small enough to fit on a shovel.

Now the bigger question is, “Can this be done every day?” That being said, 2/3CY is right at the limit for hand-fed operations. Placer is usually figured by cubic yards or meters. Your desire for 1 TPH is roughly 2/3rds cubic yards an hour. Poling and Hamilton’s work is for machine fed operations. Where am I going wrong? How to SIZE a sluice?įirst consideration is, what is the character of the material you will be putting through your sluice? – the slurry flowing in the box should contain 1000 kg/hr at 12% Solids = 1000/.12 – 1000 + 1000/2.8 = 7700 l/hr = 128 l/min is my diluted flow feeding the sluice. 4800 ls/min of water per width meter of sluice – one inch high angle iron riffles need double quantity i.e.

– heavy (6mm thick) non-flattened expanded metal riffles need 2400 ls/min of water per width meter of sluice for to work properly I want to process 1 TPH (60 liters/min) of solids, what size a sluice box set-up do I need? How much sluicing area? How wide, how long should the sluice be?įollowing values are recommended in Poling’s (1989) and Clarkson’s (1990) scientific sluice box studies: As you will see, in summary, most can optimize or troubleshoot a sluice box but few or none can size a gold sluice box. This week I went and asked “ how to SIZE a sluice box” to the crew on a large gold prospector forum and other sluice or gravity gold recovery ‘experts’ and gathered the list of emails and forum posts here below.

How to build a highbanker dredge combo how to make a slosh box