Show off yer sluice

[arizau]

Thanks for the input, guys. I'll start with the ribbed mat and see what I can come up with.

Deep vee is what is most mentioned. Some shallow vee running parallel to the flow before the mat is said to promote laminar flow and I use that in my slick plate area as a way to ramp up for a smooth transition to my goldhog mat for which the transition is problematic anyway.

 

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[Scoutdude]

Gold hog Viper

 

[wtetro]

I'm adding hog mat to my 60x10 Highbanker combo, I love that stuff

 

[Goldwasher]

Eastern Sierra?

View attachment 1262633
Gold hog Viper

 

[PurpleGold]

Here's my Royal powered sluice. It's nothing special but has been fun.

 

[Sample Pan Dan]

Here's my Royal powered sluice. It's nothing special but has been fun. View attachment 1262776

You just running that with a small battery and bilge pump?

 

[PurpleGold]

You just running that with a small battery and bilge pump?

Yeah its running off a 12vdc car battery and 2000 gph pump. This is the exact kit I bought from Royal http://www.royalmfgind.com/index.php/products/product/243 They now even have a highbanker attachment for it. But I'm going the way of the Bazooka and will probably never use this again.

 

[jsurddy]

I'm thinking about using a 1/4 inch stainless organizer thingy as a classifier on my sluice. I am wondering if I set it in the slick plate as the photos show, if it will allow enough water to clear the smaller material without impeding the sluice box. I've got good flow where I will be doing this.

Has anyone else tried this or similair? Good results, bad?
Thanks

Your expanded metal is backwards. Just wanted to let you know so you dont loose your gold.


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[jsurddy]

Nevermind. This conversation has already taken place. And i agree with everyone who says direction does matter.


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[KevinInColorado]

Nevermind. This conversation has already taken place. And i agree with everyone who says direction does matter.


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Scientific studies (Univ of The Yukon) show orientation of expanded does not matter.

 

[Goodyguy]

Scientific studies (Univ of The Yukon) show orientation of expanded does not matter.

Was that study using "RAISED" expanded metal or just expanded metal? And was it a controlled study using only one set of variables?

Either way low pressure areas ARE created within the flow over "RAISED" expanded metal regardless of orientation, and as such gold will fall out of suspension in those areas.

HOWEVER, if you wanted to nit pick I would argue that while orientation of expanded metal has NO effect on creating low pressure areas, in the case of "RAISED" expanded metal one direction should create more low pressure than another due to the exit angle vs the approach angle of the raised expanded metal itself having a more favorable effect on creating low pressure. in addition there is a scouring effect that is more exaggerated when the direction of the raised expanded is running the wrong way.

I've found that controlled studies can often times be skewed due to not conducting the experiment using variables such as running at differing velocities as well as angles and sizes of gold used and even different sizes and styles of "Raised Expanded Metal" those variables may not have been taken into account if it was a controlled study using One set up, one style expanded and simply reversing the expanded.

Velocity and angle combined with size of the raised expanded metal do have an effect on the amount of low pressure created and should be taken into account during a thorough study.


GG~

 

[Goldwasher]

I would argue that if it is the "wrong way" the raised expanded will create a ramp of material. And due to the lack of a protected scouring /concentrating eddy gold will have a chance to get up into laminar flow again if it can't settle into the material. depending on the density of the feed slurry it may take longer for the gold to find a trap it can get down into. i think the orientation does mater whenever you have a drop with two different heights... High to low always allows low pressure and protection from the wrong type of scour....low to high seems to lend itself to build up of too much material and higher pressuere against the downstream side. That is why you see build up and movement beind riffles and relatively quick clearing in front of a riffle when a sluice is running properly.

 

[jsurddy]

The best way to settle this is to test the idea out and see how it recovers for an extended period of time. Look to see if the riffles pack up or scour out and see if any gold or lead is lost. I know how riffle design works and what works best for what i do. I personally feel much safer using the method i know wont loose gold. One thing about using expanded metal with riffles is that the expanded metal is supposed to be there to block rocks from knocking gold out of the carpet that is under the riffles. In that case the direction of the expanded metal really isnt that important. The only issue i see with that system is the expanded metal leaves gaps under the riffles and can cause water to wash the gold out from under them. Allthough, some riffles have a wide base that can cover enough expanded metal to seal up the holes.


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[Goldwasher]

my comment is based on using it for years. Couple with the studies I have read. when your using it as riffles (the bigger expanded) it most definetly matters and loads up differently vs. exchanging properly. Or if your running classified material in fine gold areas and running only expanded over moss or carpet.

 

[Goodyguy]

my comment is based on using it for years. Couple with the studies I have read. when your using it as riffles (the bigger expanded) it most definetly matters and loads up differently vs. exchanging properly. Or if your running classified material in fine gold areas and running only expanded over moss or carpet.

Exactly
When it comes to gold recovery, the variables make all the difference.

Personally when I use raised expanded metal I'm going to stick with running it the way I've found works best.

GG~

 

[jsurddy]

I'm kinda fond of this configuration for the Gold Well. Three 12" Gold Wells side x side.

View attachment 898002View attachment 898003View attachment 898004

I was just watching bearing sea gold where they had this system. I've never seen one before. What's it called?


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[jsurddy]

I was just watching bearing sea gold where they had this system. I've never seen one before. What's it called?


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Oh wait, is it called the gold well?


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[Goodyguy]

Oh wait, is it called the gold well

It's called the gold well drop riffle sluice.
A little on the pricey side..... just a small 6" by 36" sluice retails for over $500.00 with shipping.

 

[Goldfleks]

Can't show off my sluice, it hasn't arrived yet lol! Bazooka take forever to arrive.

Awaiting Fulfillment...

I feel like I'm waiting for Christmas!

 

[PurpleGold]

Here's my 30" Sniper that I love and want to show off.