wave table question

[Robo57]

First post, so be gentle. I am building a miller or wave table. my first was a aluminum table with black chalkboard paint. I used a simple small pond pump. Results were good but I wanted to do a little better job on the metal work. I also wanted to build one with a black magic type mat, so it would be easier to add a collection vial. All went well with one exception. I seem to struggle with the water flow the mat seems to tend to cause the water to separate from the sides and flow down the middle more or less. Lowering the slope causes it to spread out, but hampers the movement of the sands, so it takes a lot of work to get the material to move down. I am thinking of options. Maybe a high volume pump would help, and add a valve for fine adjustment, then I might be able to increase flow and slope to the right amounts. Any and all suggestions are welcome.

 

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[Bonaro]

Can you post pics of what you have already built?
Increasing the water flow will help and you can try adding some sort of damper. Some people use a mat to smooth and spread the water over the entire surface but I find bristles work better

 

[Robo57]

I will try and get pics up tomorrow. I have miner's moss under the spray bar, and the duct brand matting.

 

[jcazgoldchaser]

http://www.treasurenet.com/forums/gold-prospecting/400309-making-miller-table-using-rubber-mat-surface.html

 

[bakergeol]

First post, so be gentle. I am building a miller or wave table. my first was a aluminum table with black chalkboard paint. I used a simple small pond pump. Results were good but I wanted to do a little better job on the metal work. I also wanted to build one with a black magic type mat, so it would be easier to add a collection vial. All went well with one exception. I seem to struggle with the water flow the mat seems to tend to cause the water to separate from the sides and flow down the middle more or less. Lowering the slope causes it to spread out, but hampers the movement of the sands, so it takes a lot of work to get the material to move down. I am thinking of options. Maybe a high volume pump would help, and add a valve for fine adjustment, then I might be able to increase flow and slope to the right amounts. Any and all suggestions are welcome.

Hi Robo57

It is good that you are building your own equipment. The idea that you need diffuse water flow for best operation is a good one.
I encountered the same problem when I was building my small wave table. I would think that miner's moss would have too coarse
openings. You might try a finer mat(smaller openings).

By the way- A miller table and a wave table are very different devices. A wave table uses mechanical action to produce standing waves and sorts material by specific gravity. Contary to miller tables- size and weight of particles-hydraulic equivalence does not apply for wave tables- just specific gravity. I will post a video of my small wave table when I get some vacation time from work.

George

 

[Robo57]

Thanks for the reply. I guess you are right I should have said water table. I would love to see video of the wave table. I tried a larger pump his evening, and can up then flow, but it starts to cause foaming with the jet dry. I will try lighter smaller matting under the spray bar. I saw where azviper said to use a specific valve not a ball valve. where do you get that valve, and what mat do you suggest.

 

[bakergeol]

A needle type valve commonly found at Home Depot will give you a more precise flow than a ball valve. Any type sponge material will work as a mat such as you can find in the cleaning section of WalMart. I use blue furnace filter but my flow requirements may be different than yours.

George

 

[Robo57]

[video]https://www.dropbox.com/s/8kh7eqnijkmcy3j/VID_20140618_071214_028.mp4[/video]

A needle type valve commonly found at Home Depot will give you a more precise flow than a ball valve. Any type sponge material will work as a mat such as you can find in the cleaning section of WalMart. I use blue furnace filter but my flow requirements may be different than yours.

George

Here is a video showing the table

https://www.dropbox.com/s/8kh7eqnijkmcy3j/VID_20140618_071214_028.mp4

Hope this helps clear up the issues. This was shot before adding the larger pump. The angle of the fall I very light, and not enough to ash off the sand even blonds. Adding the bigger pump caused foaming issues. I will change out the flow matting under the spray bar , and add a needle valve and re test. I will try to shoot another video showing the flow issue specifically.

 

[Rosey Morgan]

Hi Robo57

It is good that you are building your own equipment. The idea that you need diffuse water flow for best operation is a good one.
I encountered the same problem when I was building my small wave table. I would think that miner's moss would have too coarse
openings. You might try a finer mat(smaller openings).

By the way- A miller table and a wave table are very different devices. A wave table uses mechanical action to produce standing waves and sorts material by specific gravity. Contary to miller tables- size and weight of particles-hydraulic equivalence does not apply for wave tables- just specific gravity. I will post a video of my small wave table when I get some vacation time from work.

George

George,

are you still alive and kickin'? Miss you!

 

[Capt Nemo]

I run both Scotchbrite and humidifier belt in my miller table.

 

[alaskaseeker]

My thoughts on this, most miners take their cons to a shop that specialize in gold recovery from black sands, this is a time consuming process and time is money.

 

[Rosey Morgan]

My thoughts on this, most miners take their cons to a shop that specialize in gold recovery from black sands, this is a time consuming process and time is money.

Do these shops advertise? Can you drop some names? I only knew of one in Wasilla Alaska, and it went broke and closed after a couple years. Has someone else started up one up there in AK and is making a go of it?


Thanks.

 

[gold tramp]

I do this type mill work.
Black sands, crush ore, table work.
I also do field assay work,
BB mining co, Dale mining district.
Twentynine palms.Ca.
Gt......