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Anonymous Poster

Gold particles clogging tubing

07/27/2007 8:55 PM

We are running an experiment where we are running small gold particles through some tubing. We find the gold tends to stick to the tubing surfaces, even if we use something very smooth like glass. We are wondering about an inherant charge of the particles causing the sticking. Any cleaner seems to pit the glass/tubing and creates more build up.

Has anyone working with something like this? And can help minimize the build up??

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Associate

Join Date: Jan 2007
Location: Edmonton, Alberta, Canada
Posts: 48
#1

Re: Gold particles clogging tubing

07/28/2007 11:32 PM

I have used Simple Green to break surface tension of flour gold because the gold was floating. Simple Green will foam. A dishwashing detergent may work without foam.

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Participant

Join Date: Jul 2007
Posts: 1
#2

Re: Gold particles clogging tubing

07/29/2007 12:01 AM

Try using anti static spray compound such as the ones used for laundry. I am not sure if this is going to work but this is a cheap experiment to try!

let me know how it turns out

Thanks

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Member

Join Date: Jun 2007
Location: Mumbai India
Posts: 5
#3

Re: Gold particles clogging tubing

07/29/2007 1:22 AM

July29th 2007

simplest logic could be static electricty. It as to be dischaegd so as not to attrat particles.

hmm how to go aut.Charge is so less, as much generated by hand rubbing.tuch of metal, close one or may be water, I dotn know but can be tried

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Anonymous Poster
#4

Re: Gold particles clogging tubing

07/29/2007 3:38 AM

It is possible that either the gold dust or the tube has charge on it.

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Guru

Join Date: Jul 2006
Location: Silicon Valley
Posts: 5356
Good Answers: 50
#5

Re: Gold particles clogging tubing

07/29/2007 4:12 AM

Are you using distilled water or DI water? If so, the water passing through the glass tube will build up a static charge. You may need to mix the water with something to counter balance the electric potential.

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Power-User

Join Date: Nov 2005
Posts: 173
Good Answers: 3
#6

Re: Gold particles clogging tubing

07/29/2007 7:52 AM

Sorry to here of your situation. I use to work in a process environment years ago, our solution to the static build-up, was to completely ground the system. All the transfer tubes had a grounding strap, and we ended up monitoring the potential from the ponds to the working tanks. As the solutions transfered from section to section, each solution had its' own density and molecular disimulars. Some mixtures had a greater potential in generating a static charge. Some sections of transfer channels required more grounding, which was due to the overal length and transfer rate of that particular solution.

Reccommendations, take a reading of the material at its primary bed, before you transfer it into the system. Then take casual charge measurements through out the routing of the solution. You might even need to magnetically charge the solution as a deterrent to it being attracted to the transfer tube. Good luck, Maximo

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Guru

Join Date: Feb 2006
Location: Piney Flats, Tennessee
Posts: 1740
Good Answers: 23
#7

Re: Gold particles clogging tubing

07/29/2007 12:21 PM

Use a product like Jet Dry or Rain X on the glass. It is a water based plastic that will coat and fill in the pits if not too large. I am not sure how it will work with the medium your using the move the gold flakes.

Check for any (+ or -) charged in the gold flakes.

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