Magnetic Black Sand Separator

[xracer550]

I have not been able to Drywash for awhile so I made a Black Sand Separator to run my cons , It came out pretty good we will see what you think .

 

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[ConceptualizedNetherlandr]

Belt sander bottom? Can you explain function?

 

[xracer550]

This separates magnetic sand from non magnetic sand for easier Gold extraction . Sluice or Pan with less heavy black sand to deal with .

 

[arizau]

I have not been able to Drywash for awhile so I made a Black Sand Separator to run my cons , It came out pretty good we will see what you think .
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Very nice build! I have seen this concept in some old (patent application?) diagrams...but is is good to see it put to use by a DIYer for home use. Did you magnetize the tail pully or just add some magnets?

 

[ConceptualizedNetherlandr]

Great. But please tell us how it works.

This separates magnetic sand from non magnetic sand for easier Gold extraction . Sluice or Pan with less heavy black sand to deal with .

 

[russau]

Years back I had s similar idea on my 4 inch dredge using 3 pcs of 3/4 inch PVC pipe filled with rare earth magnets and the pipes were sealed off at each end. these were spaced across my sluice at the head end of it. They were mounted on a slip fit mount so that I could clean them off (1 at a time ) of black sand while running without any down time to do this needed function ! It did a pretty good job of removing B.S. and nails /bits of steel /iron from my cons.

 

[arizau]

Pretty sure it works as is explained by the following: As the belt rotates around the tail pulley(magnet area) the non magnetic material falls off the belt and is directed into one container while black sands stay stuck to the belt until it rotates past the pulley(magnet area), then they drop off and are directed to another container.

 

[ConceptualizedNetherlandr]

Thank you !

Pretty sure it works as is explained by the following: As the belt rotates around the tail pulley(magnet area) the non magnetic material falls off the belt and is directed into one container while black sands stay stuck to the belt until it rotates past the pulley(magnet area), then they drop off and are directed to another container.

 

[Assembler]

Pretty sure it works as is explained by the following: As the belt rotates around the tail pulley(magnet area) the non magnetic material falls off the belt and is directed into one container while black sands stay stuck to the belt until it rotates past the pulley(magnet area), then they drop off and are directed to another container.

I'm wondering if 'donut style magnets' where used with a hole in the center for the shaft to stick though?

Very simple I like it.

 

[xracer550]

I used 20 1/2" x 1-1/2" Neodymium rare earth magnets glued inside drum roller , Donut style magnets are even more expensive than rectangle magnets . The drum rollers where left over from when I made the Drywasher Conveyors ( I did not need them ) they where Harbor Freight roller stands.

 

[Assembler]

I used 20 1/2" x 1-1/2" Neodymium rare earth magnets glued inside drum roller , Donut style magnets are even more expensive than rectangle magnets . The drum rollers where left over from when I made the Drywasher Conveyors ( I did not need them ) they where Harbor Freight roller stands.

Thanks for filling us in on what you did.
Yes the rectangle magnets are usually less cost then donut style magnets.

I like the idea of recycling HF roller stands great idea there.

 

[arizau]

I used 20 1/2" x 1-1/2" Neodymium rare earth magnets glued inside drum roller , Donut style magnets are even more expensive than rectangle magnets . The drum rollers where left over from when I made the Drywasher Conveyors ( I did not need them ) they where Harbor Freight roller stands.

If I am right to assume you stacked round magnets then I think that only half, or even less, as many ND magnets would still be effective if the magnets are separated by spacers. Wooden dowels cut to width or maybe even stacked steel washers come to mind for spacers.

Heavy pans.

 

[xracer550]

Donut magnets would have magnetic lines going the same direction as the sand , A round magnet will have 1/2 the contact points for magnetic lines , the square magnets contact on 2 corners for twice as many lines . below same size ea 10mm

 

[Assembler]

Donut magnets would have magnetic lines going the same direction as the sand , A round magnet will have 1/2 the contact points for magnetic lines , the square magnets contact on 2 corners for twice as many lines . below same size ea 10mm
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'May the force be with you' or at least your great project.
Thanks for posting xracer550.

 

[arizau]

Donut magnets would have magnetic lines going the same direction as the sand , A round magnet will have 1/2 the contact points for magnetic lines , the square magnets contact on 2 corners for twice as many lines . below same size ea 10mm
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Two different trains of thought. I was imagining stacked, 1 1/2 inch diameter disc magnets centered inside the roller.

 

[Assembler]

Two different trains of thought. I was imagining stacked, 1 1/2 inch diameter 1/2 inch disc magnets centered inside the roller.

You are thinking just like me with the 'donut style magnets' having a steel shaft going through the center for lots of lines of force on the outside of the roller going out.

 

[xracer550]

The magnets do not magnetize the whole drum it only does the outer edges of each magnet in lines 2 lines per magnet, more magnets more lines, bigger was not better in my test it made less , I have a pvc insert inside so you can put the shaft inside without fighting the magnets .

 

[Fermion]

What if you had the magnets on the side of a non metallic vertical cylinder that the cons travel through? Maybe a 3 foot drop. At the bottom of the cylinder you had a V shape divider that funneled into two buckets. If the cons were dropped nearer to the gold bucket side of the cylinder, the gold would fall straight down while the magnets would cause the path of the other material to bend toward the other bucket.

 

[Assembler]

What if you had the magnets on the side of a non metallic vertical cylinder that the cons travel through? Maybe a 3 foot drop. At the bottom of the cylinder you had a V shape divider that funneled into two buckets. If the cons were dropped nearer to the gold bucket side of the cylinder, the gold would fall straight down while the magnets would cause the path of the other material to bend toward the other bucket.

Not a bad idea in fact may work fairly well. Thanks for posting Fermion.

Are you thinking of a 1" plastic pipe size?

 

[Fermion]

Not a bad idea in fact may work fairly well. Thanks for posting Fermion.

Are you thinking of a 1" plastic pipe size?

Sure. Cheap would be to use some schedule 40 pvc. Maybe 2 inch diameter though. Tape some rare earths to one side and drop the cons down the middle biased to the other side, put the v-divider in the bottom. I wonder if you could auto feed it hourglass style using a cheap plastic funnel...