separate the copper top from processors

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baltimorerecyclers said:
Advice is appreciated on how to separate the copper top from processors. Is it okay to use an epoxy solvent? Without damaging the gold content?

I put the fiber part in a vise. As you tighten it the fiber will flex (bend) and break the bond on the top or even totally pop it loose.
 
I like to take the pins & monolitic cap's off, so I heat them in my iron skillet, then I scrape them off and pry off the heat sink. It comes off real easy.

Phil
 
baltimorerecyclers said:
What type of solvent should I avoid?
I'm not even a refiner wanna-be (I recover and reclaim, but all the chemical work is sent out to those more experienced), but it seems pretty clear to me that you got two great answers, neither of which discussed any type of solvent whatsoever.

When you ask questions of a mentor/master and they are kind enough to give you sound, well tested advice, you should heed it well and not continue asking questions down a different path (even though you may have come to them with that thought).

To be more clear (in case you missed my point...), I'd say you should avoid ANY type of solvent, if you are going to follow the sage advice given!
 
After removing the pins, I stick the fiber edge in a vice (dosn't need to be too tight) then I stick my thin sharpened putty knife in between the copper top and fiberglass. give the putty knife a wack with whatever's handy, and they pop right off. I just did about 30 of them, took about 15 minutes or so.

-Zenophryk
 
I started this thread, and wanted to 'subscribe' to it ... I know that I have done so previously with other threads here, I see them in my control panel > manage subscriptions. But something changed, or I am missing it. I stopped following, and missed some messages ...

And so I am back to try and revive this thread. I want to thank everyone for their replies. Right now, we are still doing it by hand, as suggested, with: hammer, screwdriver and vise. It is slow going, but it works. There is a rubbery type adhesive joining the 2 parts.

Going in, I was attracted to the idea of using some sort of solvent. That is what started this thread in the first place. I don't know what breaks down the gold, and I didn't want to use something that would destroy the materials.

In the interim, I tried experimenting with what ever I had on hand, letting a single chip soak for a few days.

  • Alcohol didn't do anything (70% isopropyl, rubbing alcohol).

    Nail polish remover (acetone?) softens the adhesive, but doesn't do a complete job, still needs a screwdriver.

In another life, I was in the glass and glazing business. The adhesive looks very much like a small version of double face tape. So I called a buddy of mine that is still in the glass business, and presented my problem to him ... his 'secret' was nail polish remover.

philddreamer wrote > "I heat them in my iron skillet", but warned "Don't get then too hot or you'll have a mess in your hands, not to mention a lot of toxic smoke!".
This is a concern. If both materials, the adhesive and the processor, have similar melting temperatures. It makes me lean towards solvents as opposed to heat.

pimpneightez wrote > "Are some of those copper heat sinks silver plated, tinned or both?"
You raise a good point. After checking the first few on the bench grinder, I have been assuming they are all copper. I don't know how to *easily* determine if there is any silver there. And if so, is it worth separating?

All the best, Barry, Baltimore Recyclers
 
Very little gold there to be spending money on acetone let alone the fire hazard. Use a second hand electric skillet if you are worried about over heating. I'll take heat or mechanical means any day.
 
baltimorerecyclers said:
Geo said:
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=64&t=13308
i am not missing the email ... it's not being sent, because i am no longer able to see how to subscribe to the thread ...

At the bottom left of the page you will see 'Bookmark topic', click this to subscribe to the thread.
 
Baltimore, all it takes is enough heat in order to soften the glue, and then pry with a spatula... I place 8 or 10 with the heatsink against the skillet for 30 or 40 seconds, and I start prying. If you leave them and walk away, they will over heat...
and then you'll have a mess! :mrgreen:
With some practice you'll do fine. No need for solvents, Bro.
By the way, I only take the heatsink off now. I'll place them later, without the heatsink, in HCl.

Take care!

Phil
 
martyn111 > At the bottom left of the page you will see 'Bookmark topic', click this to subscribe to the thread.

Yes. It says 'Remove from bookmarks'. What I was looking for, is to get an email when the thread is updated.
 
baltimorerecyclers said:
martyn111 > At the bottom left of the page you will see 'Bookmark topic', click this to subscribe to the thread.

Yes. It says 'Remove from bookmarks'. What I was looking for, is to get an email when the thread is updated.


The emails are not working for anybody right now, since Noxx stated that in the post in the link that Geo posted.

http://goldrefiningforum.com/phpBB3/viewtopic.php?f=64&t=13308#p134291

Jim
 
Hello Phil,

> I place 8 or 10 with the heatsink against the skillet for 30 or 40 seconds, and I start prying. ... No need for solvents, Bro.

I haven't timed myself, but I think I could clean 2 processors a minute with a hammer, a small screwdriver, and a bench vise. I was hoping to process them in batches from 5 to 20 lbs of processors. I have no personal preference towards solvents, I just thought they might be good for this.

> By the way, I only take the heatsink off now. I'll place them later, without the heatsink, in HCl.
I am a primarily a 'scrapper', I guess our goals might be different. What I am after is ways to increase the value of my materials. Am not further processing, I am selling.

All the best, Barry
 

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