bazooka-type sluice build

revanlive

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Hi guys !
New here and fresh to the gold prospecting as well !
If you want to go straight to the point skip to number 4.


1- To tell you the background, I'm in Ireland and prospect some streams around since may.
I've been around 20 times out and have found gold i think 18 times so I'm really hooked !
Nothing crazy really, i'll attach a picture or two of what i have so far, knowing that I find in average 5/7 pieces per trip but increasing !
The gold is beautiful, coarse but small. Nothing like flat flakes here. I found some pieces that are like a frozen shrapnel explosion still holding some black sand, very cool specimens but tiny !
IMG_1435.webp
IMG_1484.webp

2- Anyway, at the moment I'm using a gold rush nugget bucket,and even though I love it, it's very slow to use. I usually process around 4-6 bucket in 4h or so (15L buckets).
I was planning on getting a grizzly gold trap but they closed down, and croc gold have problems with their shop for the last 6 months, and all are super expensive even without the shipping to Ireland.

3- So I thought I could make a sluice myself like many people !
Over the last 2 days I've done a bit of research and drawing and this afternoon I decided to model my plans in 3D (wich I had never done before but turns out it's very easy with tinkercad, and it's free).


4-I decided to make a small size fluid bed which would be perfect to reachfar areas and trap the very fine gold here. 45cm long, with a trap of 13.5x13.5 with the entry height at 5cm and the exit 6cm.
sorry for the imperial system user :(

MASSIVE thanks to Goodyguy and Goldwasher for their super answers on previous posts that helped me so much. All my dimensions fit their recommendations.

But with all the research I have 2 last questions :
- I've seen some have a "flow deflector plate" attached to the roof of the trap after the grizzlies, in order to disrupt the flow and break the surface tension to avoid floating fine gold to skid right through the sluice. Can you point me in the right direction as of how long the plate should be and where in relation to the trap ?
Should it be right after the dip in the trap and go as far as the height of this one ? i'm afraid that it'd clog the system. Check out the picture as it is right now.
sluice side view modif.webp

- The grizzlies at the moment would be 2mm thick with a spacing of 10mm (almost 3/8th of an inch I think). Does this look too small for you ?
sluice back.webp

-Oh and an extra question : for such a small sluice, I plan 3 tubes with 18 holes each. One bottom hole every 2cm and 2 holes at 5 and 8 o'clock every 2cm as well,alternated in relation to the bottom one.

sluice holes pattern.webp
sluice tubes holes.webp

(Goodyguy posted that pattern befor, credits to him).

If you are interested don't hesitate to ask anything about the design.
I have a few tweeks to do before calling it finale but when it's done I can drop the final designs and dimensions. I'm trying to keep it under 100€ and I should reach the target :)

Thanks for the read and the help :)
 

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Yeah I hear you. The more you dig the more you find :) I've almost finished modeling the plans for the 30inch sluice which I think is the best compromise in size/efficiency for my conditions.
Thanks for the tip about test pannin this will help a lot ! I was trying to get to the good stuff, so digging a lot, and pan one or 2 full pans of it.
I'm also getting better at panning so that's a + !
Hopefully this will help me have confidence in a spot. I'm confident when I pick a spot but it often turns out to be very weird once i start digging. But I hope I'm getting better, I take my time trying to read the river.

As for the nugget bucket, I'd say the way it works is by funelling the water at one spot, it fluidise the material and create a high pressure area that quiet down around it. Like a waterfall per say.
I agree it's clunky and not pro looking and very slow and all of that, but in the end it allowed me to find my first gold, and more importantly to get hooked into prospecting too :)
I'm sure when I'll be experienced I'll be looking back and think I was a fool using that :laughing7:

Oh and yeah don't talk about the scoop that broke pretty much straight away ha !
 

how wide are you thinking of making it?
 

34cm wide at the flare (13+ inches). Reducing to the trap of 22.5x22.5cm (8+").
Keep in mind I aim for roughly the size of my rucksack.
 

Extensive, scientific testing by GGT proved he “diverter strip” is a bad idea. It creates turbulence which loses fine gold...it’s a failed concept. Just skip it on your build.
 

Extensive, scientific testing by GGT proved he “diverter strip” is a bad idea. It creates turbulence which loses fine gold...it’s a failed concept. Just skip it on your build.


When I talked to Dennis thats not exactly what he said.

The main difference is when your adding dry material. The hydraulic tester guy Dennis used said it didn't seem to make a difference. Not that it lost gold. With a downward pressure it creates how would it?

More than the Grizzly bars? More than the inspection grooves?

I'd really like to know how "extensive" and "scientific" these tests were.

Before mine fell apart and became useless. It was not catching more fine gold than my Bazooka did.

My modified aluminum sluices and drop riffle I use capture more fine gold than a Bazooka or GGT.

Lab testing and field use often yield different results.
 

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