Underwater sluice

[Reed Lukens]

I talked with Glenn a few years back about his Dragon Subbie, he really put together a nice machine. I've got the basic schematic for it here somewhere... I still have an 8" subbie that fits under my 6" homebuilt sitting in California... When set up right, they work great.

Then I also have my 4" subbie.

 

Amazon Forum Fav 👍

Minelab PRO-FIND 35 Waterproof Pinpointer Metal Detector for Experts with Tone ID & Adjustable Sensitivity - Grab it through Amazon!

[ZombieKnot]

I really heavily doubt you need 50k to replicate that thing. It’s basically just a subsurface sump to sluice system. You’re still stuck with the inefficiency of an underwater sluice.

Dirt falls in water and out. gold falls too but slower in water as 100 pounds-sorry 40kgs.- in water weighs 600lbs-250kgs out of water, a 6:1 ratio. water is 200 times denser than air. making a calibrated orifice, seal sluice on top so you shovel into opening. big long tube that prevents eddy stream above riffles. start at 30 degrees and watch with flashlight for turbulation AFTER THE RIFFLES. heavies will fall after riffles when correct angle of box achieved. trial and error but you will be worlds expert after few hours. suspect 50% gold recovery without water flow vortexes; called GRAVITY FLOW RECOVERY. you will find angle that aggregates fall out and heavies stay in. my experience says to remove riffles and run with mat only. recommend miners moss-by 3M. KEEP TRYING!

 

[N-Lionberger]

Dirt falls in water and out. gold falls too but slower in water as 100 pounds-sorry 40kgs.- in water weighs 600lbs-250kgs out of water, a 6:1 ratio. water is 200 times denser than air. making a calibrated orifice, seal sluice on top so you shovel into opening. big long tube that prevents eddy stream above riffles. start at 30 degrees and watch with flashlight for turbulation AFTER THE RIFFLES. heavies will fall after riffles when correct angle of box achieved. trial and error but you will be worlds expert after few hours. suspect 50% gold recovery without water flow vortexes; called GRAVITY FLOW RECOVERY. you will find angle that aggregates fall out and heavies stay in. my experience says to remove riffles and run with mat only. recommend miners moss-by 3M. KEEP TRYING!

We were talking about a subsurface dredge, no shovel involved.

 

[ZombieKnot]

We were talking about a subsurface dredge, no shovel involved.

sorry was answering gold999's question about an underwater sluice, in france where no dredge is allowed.

 

[N-Lionberger]

sorry was answering gold999's question about an underwater sluice, in france where no dredge is allowed.

You quoted my post about a subsurface dredge.

 

[ZombieKnot]

You quoted my post about a subsurface dredge.

new to computers and not computer literate. got a tablet for christmas and joined first prospector club that popped up. trying not to step on toes? just learning new dance.

 

[N-Lionberger]

new to computers and not computer literate. got a tablet for christmas and joined first prospector club that popped up. trying not to step on toes? just learning new dance.

No problem I was just confused.