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Gold Prospecting Forums - General => Do It Yourself Projects => Topic started by: astrobouncer on December 14, 2011, 08:21:13 PM

Title: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: astrobouncer on December 14, 2011, 08:21:13 PM
When prospecting mobility is important when you have to get off the beaten path and its a hard hike to gold bearing gravels. Sometimes its just too far to hike in while rolling a conventional highbanker or coming down a mountain or steep grades. So I built this bare bones fluidized bed highbanker/concentrator for about 50 bucks. It would have been much cheaper, but I underestimated how many square feet of rolled steel I needed for the grizzly. I ended up using 13 bars @ 3 bucks a bar. The rest of the cost was for the PVC pipes (mostly the 2 flow adjustment ball valves).

I built this in about 2 hours, and then tested it for only 30 minutes. I know it needs much more testing and the spray bars are not final.

(http://img834.imageshack.us/img834/8326/1001433bh.th.jpg) (http://img834.imageshack.us/i/1001433bh.jpg/)

Here's putting the pvc together to make the hydraulic/fluidized bed riffles for the bottom spray bar.

(http://img580.imageshack.us/img580/1745/1001434h.th.jpg) (http://img580.imageshack.us/i/1001434h.jpg/)

(http://img687.imageshack.us/img687/783/1001435i.th.jpg) (http://img687.imageshack.us/i/1001435i.jpg/)

There are 5 bars, with 6 spray holes on the bottom each a little smaller then 1/8 inch. Sorry I forgot to take a pic of them. 
(http://img840.imageshack.us/img840/3770/1001438m.th.jpg) (http://img840.imageshack.us/i/1001438m.jpg/)

The fluidized bed trap is 6 inches deep by 10.5 inches wide however, after testing I think the trap is going to need to be shallower in order to pump out the tailings easier. 

(http://img534.imageshack.us/img534/8138/1001443ar.th.jpg) (http://img534.imageshack.us/i/1001443ar.jpg/)

(http://img9.imageshack.us/img9/1820/1001444il.th.jpg) (http://img9.imageshack.us/i/1001444il.jpg/)

(http://img850.imageshack.us/img850/9199/1001445x.th.jpg) (http://img850.imageshack.us/i/1001445x.jpg/)

These spray bars are just something I was trying, I am going to build regular spray bars like on a conventional high banker. These did not cover the area enough to wash the gravels well.

(http://img163.imageshack.us/img163/403/1001446o.th.jpg) (http://img163.imageshack.us/i/1001446o.jpg/)

(http://img39.imageshack.us/img39/7199/1001449.th.jpg) (http://img39.imageshack.us/i/1001449.jpg/)

Here's how I made the grizzly, this was Dr Phils idea and it worked great. Just a bunch of bent rolled steel. Then I drilled holes in the bucket to slide them through. They are removable if needed and I might need to strengthen the bucket on the bottom part where all the gravel slides.

(http://img641.imageshack.us/img641/1409/1001479hy.th.jpg) (http://img641.imageshack.us/i/1001479hy.jpg/)

(http://img193.imageshack.us/img193/6479/1001480u.th.jpg) (http://img193.imageshack.us/i/1001480u.jpg/)

I used about a 3/8 inch spacing on the grizzly but a couple of them went slightly larger (to almost 1/2 inch). I intend to make a 4 mesh hardware cloth grizzly to fit over that when I want to classify smaller.

(http://img685.imageshack.us/img685/4554/1001483q.th.jpg) (http://img685.imageshack.us/i/1001483q.jpg/)


I cut all these with a hack saw and measured each one out so it would fit right.

(http://img805.imageshack.us/img805/7986/1001484.th.jpg) (http://img805.imageshack.us/i/1001484.jpg/)

(http://img847.imageshack.us/img847/9340/1001485c.th.jpg) (http://img847.imageshack.us/i/1001485c.jpg/)

(http://img703.imageshack.us/img703/2383/1001487k.th.jpg) (http://img703.imageshack.us/i/1001487k.jpg/)

(http://img267.imageshack.us/img267/6820/1001488z.th.jpg) (http://img267.imageshack.us/i/1001488z.jpg/)

(http://img812.imageshack.us/img812/6355/1001490p.th.jpg) (http://img812.imageshack.us/i/1001490p.jpg/)

(http://img684.imageshack.us/img684/9381/1001491v.th.jpg) (http://img684.imageshack.us/i/1001491v.jpg/)

Here's one of two ports for tailings. The tailings come out either side on the back. They are about an inch high so they cant get plugged up. The lighter material constantly boils out of these while running (and the heavier stuff settles deeper into the slurry). 

(http://img269.imageshack.us/img269/56/1001499n.th.jpg) (http://img269.imageshack.us/i/1001499n.jpg/)

(http://img823.imageshack.us/img823/8639/1001501l.th.jpg) (http://img823.imageshack.us/i/1001501l.jpg/)

Here's my small water pump next to the bucket highbanker. I have used this pump for my bigger highbanker as well.  That pump is nice and lightweight and easy to carry, only rated at about 39gpm at full throttle but that's more then enough water for either high banker.   

(http://img193.imageshack.us/img193/3959/1001508v.th.jpg) (http://img193.imageshack.us/i/1001508v.jpg/)

(http://img809.imageshack.us/img809/5898/1001511r.th.jpg) (http://img809.imageshack.us/i/1001511r.jpg/)

Here it is all ready to take for some testing.

(http://img3.imageshack.us/img3/6033/1001512gv.th.jpg) (http://img3.imageshack.us/i/1001512gv.jpg/)

And next to my main highbanker.

(http://img849.imageshack.us/img849/3901/1001514w.th.jpg) (http://img849.imageshack.us/i/1001514w.jpg/)


Now time to hit the creek for some testing.

(http://img248.imageshack.us/img248/9624/1001515o.th.jpg) (http://img248.imageshack.us/i/1001515o.jpg/)

(http://img706.imageshack.us/img706/203/1001516s.th.jpg) (http://img706.imageshack.us/i/1001516s.jpg/)

(http://img864.imageshack.us/img864/9633/1001517x.th.jpg) (http://img864.imageshack.us/i/1001517x.jpg/)

(http://img62.imageshack.us/img62/2935/1001518u.th.jpg) (http://img62.imageshack.us/i/1001518u.jpg/)

(http://img31.imageshack.us/img31/7525/1001521l.th.jpg) (http://img31.imageshack.us/i/1001521l.jpg/)

To clean it up you just turn it sideways and let the water pump it into another bucket. Or you can just carry it out as it sits when you turn the water off.

I think it worked pretty good for a first test run. Here's the cleanup pics. It caught much smaller then 100 mesh as well as anything bigger. I only ran about 25 shovelfuls of material because the top spray bar needs regular bars for better washing of material. 


(http://img824.imageshack.us/img824/9199/1001525i.th.jpg) (http://img824.imageshack.us/i/1001525i.jpg/)

(http://img41.imageshack.us/img41/3884/1001534pu.th.jpg) (http://img41.imageshack.us/i/1001534pu.jpg/)

So what did I learn? Well it does work but I need to redesign the trap to either be shallower and/or increase the flow coming out of the bottom  water bars so it flushes out the lighter stuff easier. Right now its holding too much blond sand which means you have a lot to pan out when its time to clean up. A smaller trap would alleviate that. Also since the trap is so big it holds a lot of black sand, which makes it really heavy to carry out without first panning it down further. And obviously the water delivery method for the grizzly is not done. I am going to put some conventional top and side spray bars on soon as well as make it out of larger diameter pipe. 
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: idled on December 14, 2011, 08:37:41 PM
I was thinking about putting some thing like that together as well. But using a square pail and putting a slick plate under the grizzly.
So that the con would enter the fluid bed on one side and the blonde's and lights would exit on the opposite side.
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: TroyB on December 14, 2011, 08:40:22 PM
Cool build Astro.
Like to see a video of it in action.
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: sulcata99 on December 14, 2011, 08:53:18 PM
Great build and a cool idea! You may not want to make the trap shallower, it will hold more heavies as is and you wont have to clean out very often. Might even get a full day out of it!
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: heartlander27 on December 14, 2011, 09:39:08 PM
Cool build. I like the idea of keeping the bed still, without water flowing horizontally over the top.   {cool^sign}
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: NickMarch on December 15, 2011, 06:09:37 AM
Good job astro!

I like anything original and not ordinary! 

If I may a few suggestions from my out of the ordinary mind...

Fluidized beds work best if the water is delivered thru the bottom.  You can use two buckets instead of one to accomplish this. 

Put a bulkhead fitting in the side of the bottom bucket to deliver the water into the system.

Drill holes in the bottom of a second (top) bucket and put the second bucket into the bottom bucket.  You will need to anchor the top bucket to keep it from rising under pressure.

You may also be able to drill holes into the sides of the top bucket to spray the grizzly bars??? 


Nick
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: muconium on December 15, 2011, 02:10:57 PM
Right on Astrobouncer... My creative-winter-thinking has been heading in the same direction: Spraybars and grizzly feeding into a fluid bed that uses this design from the "fluid-bed thread" at another forum:

 [ You are not allowed to view attachments ]

I'm on the fence about whether to use a fluid bed or a drop riffle sluice. Sluice highbanker means less plumbing work, but a fluid bed can be fed faster...   <-thinking-> <-thinking->
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: PlacerWilly on December 15, 2011, 09:23:29 PM
 Really Neat astrobouncer !
Thanks for sharing and I look forward to more tests and such !
Well done  {-applause-}
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: sulcata99 on December 17, 2011, 07:13:10 PM
How many shovel fulls a minute do you think it will run?
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: ebuyc on December 18, 2011, 08:01:55 AM
I like this design a lot!  {cool^sign}  [-1st-]

What is the difference if any between the fluidized bed and an elutration tower? (I think that is what it is called - like my quicksand concentrator)
In the quicksand concentrator it is a vertical pipe that suspends and pushes out the lights... (versus the fluid bed horizontal design)

I want to see more of these!  <-hypnotized->

Pros and cons? Anyone?

Yep need more input so I can build something like this too!

Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: sulcata99 on December 18, 2011, 10:39:18 AM
I like this design a lot!  {cool^sign}  [-1st-]

What is the difference if any between the fluidized bed and an alluvial tower? (I think that is what it is called - like my quicksand concentrator)
In the quicksand concentrator it is a vertical pipe that suspends and pushes out the lights... (versus the fluid bed horizontal design)

I want to see more of these!  <-hypnotized->

Pros and cons? Anyone?

Yep need more input so I can build something like this too!


Water Column Separators (http://gpex.ca/smf/index.php?topic=1908.0)
That is a link to a water tower discussion.
The main difference I see is that a fluid bed lets the heavies settle down and an E-tower suspends all the material in layers and should only let gold drop out.
As for cons there might be more cons to deal with depending on how big your bed is. Like the other post shows a smaller clean up fluid bed to run cons might help cut these down.
I also feel if the system isnt balanced gold could be lost. To much water coming up to fast may not give the smaller gold time to settle and not enough will cause the bed to pack up and give the gold no place to settle.
My plan is to test a few different styles next spring buy running the tailings through my sluice.
Here is a link to a drop trap fluid bed sluice you might want to check out too.
Built my own drop trap sluice (http://gpex.ca/smf/index.php?topic=5434.0)
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: ebuyc on December 18, 2011, 10:58:34 AM
Water Column Separators (http://gpex.ca/smf/index.php?topic=1908.0)
That is a link to a water tower discussion.
The main difference I see is that a fluid bed lets the heavies settle down and an E-tower suspends all the material in layers and should only let gold drop out.
As for cons there might be more cons to deal with depending on how big your bed is. Like the other post shows a smaller clean up fluid bed to run cons might help cut these down.
I also feel if the system isnt balanced gold could be lost. To much water coming up to fast may not give the smaller gold time to settle and not enough will cause the bed to pack up and give the gold no place to settle.
My plan is to test a few different styles next spring buy running the tailings through my sluice.
Here is a link to a drop trap fluid bed sluice you might want to check out too.
Built my own drop trap sluice (http://gpex.ca/smf/index.php?topic=5434.0)

Ok thanks - I found the term is 'elutration column' not 'alluvial tower' haha. I understand the concept now much better from the old thread GollyMrScience wrote up.

Thanks again - gives me something to think about today  ;D

I had no idea people could run these after a highbanker....  <-shock_>
[youtube]http://www.youtube.com/watch?v=toItdie_0Qw[/youtube]


Hmmm  <-thinking->
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: astrobouncer on December 19, 2011, 09:28:45 AM
Thanks for all the replies guys, I haven't had time to test it yet since changing it over to conventional spray bars with 1 inch lay flat hose (lay flat hose not pictured since I was just testing the spray pattern with garden hose in the yard). If its anywhere near as fast as a bazooka sluice, it will be able to process material as fast as I can shovel it. As you can see, I am keeping the amount of water up top to a minimum so the bottom has enough power to boil out the light stuff. Will post pics + videos when I get more testing time in.  

(http://img171.imageshack.us/img171/2031/dec162011025.th.jpg) (http://imageshack.us/photo/my-images/171/dec162011025.jpg/)


(http://img694.imageshack.us/img694/3475/dec162011023.th.jpg) (http://imageshack.us/photo/my-images/694/dec162011023.jpg/)

Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: indyme2 on December 19, 2011, 11:40:01 AM
Great job, Astro. I will hook up with you later this week or weekend and let you get a close up look of the quicksand concentrator ebuyc is talking about. We used it last weekend to clean up some cons and it works pretty well.
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: sulcata99 on December 19, 2011, 01:22:14 PM
ebuyc I couldnt find the forum but I think it was astrobouncer who had some pictures of a drop trap sluice he put a fluid bed trap at the end. Maybe he can point to it for us?
GMS did a great job on the E-towers thats why I didnt try, lol

astrobouncer I hope it goes well and will run fast for you! Keep us posted please, this is a fun project that could pan out, lol
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: doublenotminer on January 03, 2012, 09:20:07 AM
I like this a lot, might have to make one. {-applause-} [<-panning->]
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: Meh on January 25, 2012, 12:28:14 AM
astrobouncer:

I really like the concept of this bucket highbanker - compact and uncomplicated.

I may have to build something similar to try out on the flour gold on the NSR, perhaps using the Angus MacKirk grizzly on top of the bucket and a 3/16" punch plate backed up with a slick plate where your grizzly is.


        Angus MacKirk's Bucket Grizzly Test
      - YouTube
   (http://youtu.be/AHkgipOvAuE?hd=1)
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: ebuyc on January 25, 2012, 05:24:45 AM
astrobouncer:

I really like the concept of this bucket highbanker - compact and uncomplicated.

I may have to build something similar to try out on the flour gold on the NSR, perhaps using the Angus MacKirk grizzly on top of the bucket and a 3/16" punch plate backed up with a slick plate where your grizzly is.


        Angus MacKirk's Bucket Grizzly Test
      - YouTube
   (http://youtu.be/AHkgipOvAuE?hd=1)


The bucket grizzly doesn't allow you to properly wash material since the 1/2" barbeque grate is flush mounted - I have looked at mine several times and thought about how to improve it - It needs side walls and a way to slow material down at the end in my opinion.  But I admit I have had similar thoughts about using it...

I think I could put a decent pump and a sealed gel battery in one bucket to feed the fluid bed and act as a seat when needed  ;) lol "two bucket method"  [email protected]*

 

Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: NickMarch on January 25, 2012, 06:16:13 AM


I think I could put a decent pump and a sealed gel battery in one bucket to feed the fluid bed and act as a seat when needed  ;) lol "two bucket method"  [email protected]*

 

Something wrong with or funny about the "two bucket method"

Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: ebuyc on January 26, 2012, 07:30:10 AM
Something wrong with or funny about the "two bucket method"

No nothing wrong - funny yes - just cracks me up - "two two bucket method" - the voice reminds me of one of my friends and he is a wanna-be comedian for sure - probably has something to do with it  ;)

I actually think the concept is great - but I can't help but laugh when I watch that video!
[youtube]http://www.youtube.com/watch?v=fuejIDMgnrQ[/youtube]


Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: NickMarch on January 26, 2012, 07:43:24 AM

I rarely use it except to sample but it works great!  I use the same concept with a cone bottom tank and a pump.  Try it!  I'd put it up against anything out there to get concentrates. 

Nothing 200 mesh or larger leaves the tank.  It retains a lot of -200 but some of the -200 will be lost.  It get all the gold that runs off of sluices, highbankers and dredges. 

It's really the same concept as a blue bowl but runs a whole lot faster and can process materials faster than you can shovel.  Actually with some help you can shovel and dredge into the tank at the same time. 
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: Vikingsniper on January 28, 2012, 07:12:02 PM
That is a really  {cool^sign} idea for sure  <-idea-> Thanks for Sharing astrobouncer  <-good_>
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: astrobouncer on May 12, 2012, 10:18:23 AM
I finally got around to testing this some more, and it was just not meant to be that day. Despite the many problems I still managed to get some gold for the short time it ran, and it worked great. I had a good exchange rate of the lighter tailings.


        Testing Fluid Bed Bucket Highbanker + Gold Recovered
      - YouTube
   (http://youtu.be/xJ6zk7wJz-c)

This trip was a recipe in disasters of my own making and the weather was bad that day (raining hard). I topped off the water pump's gas tank before going so I would not have to fill it at the creek. But I had a couple accidents wheeling the high banker on the way in on the wet leaves (and steep hills) and tipped the pump over twice (not near the creek!). Once I got to the creek, I ran it for roughly 10 shovel fulls and it cut off. Not knowing it was out of gas since I had topped it off (you can hear it about to run out towards the end) I figured something had plugged up my intake hose since I was testing a new filter I made so I took that hose off. Seeing that wasn't the problem I checked the tank and realized the two near spills of the pump down those two hills earlier must have lost the fuel. So I hiked back to the road to get my small 1 gallon gas can out of the car (15 minute hike one way). Coming back, it was raining pretty hard and I thought I had the pump intake hose on correctly so I started screwing it in. Being a stiff hose, It turned funny and cross threaded, messing up the main seal to the highbanker. I sighed and gave up and went and got my other highbanker which luckily I had put in the trunk to test too. Despite all that, this thing did pretty well and caught some flour gold. I plan to sit it inside a cement mortar tube next time I run it so I can pan the tailings.  

I have the top water flow turned way down so the bottom chamber remains fluidized. However, as you can see, I still could use some more water up top to wash the rocks off. Its a fine line with a fluid bed to keep them fluid, especially when you are dealing with 4 mesh gangue. Its a lot easier to fluidize 8 mesh and smaller but since the grizzly is different on this one, I would never see the oversize gold like on the bazooka grizzly.  

Anyway, more testing coming soon. I think it worked great, in the short time it was running.


Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: indyme2 on May 12, 2012, 05:11:26 PM
Looking good, Astro!
Title: Re: Bucket highbanker with hydraulic/fluidized bed riffles
Post by: GoldPoor on February 06, 2013, 11:52:06 AM
So what was thr runs like during the past season Astro?  Is there anymore vids?

I am attempting to build one but in a square bucket.  I have a 1000gph bilge pump and I will use 1/2 pvc pipe.  With the other ideas on the thread I will put a slick plate under the screening but on an opposite angle and only one overflow exit on the same side as the  screen.

When I get it done I will post.