My Next Project!!!!

[Barren Realms 007]

Knowing Jerry and his work habits, it will take far less than 24 hours to process this material.Unless you count the time for the acid's to do there job.
Personally,I do not sit and watch the acid,I use that time to break down more material.
You could look at it this way,40 hrs.at a convience store for $7.00 per hour= $280 . 24 hours refining $230 based on ken's projections.
Which would you choose.
john

To be honest. Neither, I would go after higher grade material if possible. But that is not always the possability. I will give Mod an "A" for effort and tenacity. But I still think he needs to learn when to walk away from a deal.

 

[modtheworld44]

Update for yall


I peeled twenty five grams of gold traces from these boards for a small test run.I got 0.2 grams on recovery still needs second refining.Is this better averages than by weight for whole fingers per pound.Thanks in advance.



modtheworld44

 

[g_axelsson]

How did you refine it the first time? Did you just melt it down after removing base metals?
If you did then there could still be quite a lot of nickel in that button and I would call it recovery, not refining.

Göran

 

[FrugalRefiner]

I don't know how it would compare to averages for fingers, as I've never peeled the individual contacts from fingers, but it is a very interesting ratio. 25 grams of gold plated copper circuit board traces yielded .2 grams of recovered gold, so the gold weighs less than one percent of the total weight of the traces. Interesting. Thanks for sharing that.

Dave

 

[modtheworld44]

How did you refine it the first time? Did you just melt it down after removing base metals?
If you did then there could still be quite a lot of nickel in that button and I would call it recovery, not refining.

Göran

g_axelsson

I did my recovery with AR and dropped the gold out with SMB.I used ammonia washes to remove the copper I knew would get dragged down.I then dried and melted it.This button will sit until I run the rest and recover all the gold then I'll put it all back through AR for a second refine.Thanks in advance.

I don't know how it would compare to averages for fingers, as I've never peeled the individual contacts from fingers, but it is a very interesting ratio. 25 grams of gold plated copper circuit board traces yielded .2 grams of recovered gold, so the gold weighs less than one percent of the total weight of the traces. Interesting. Thanks for sharing that.

Dave

FrugalRefiner

I my math is correct that's 0.8% by weight.If I'm wrong please correct me.So for a pound of these traces I should be able to get 3.632grams pleas check my math again.Thanks in advance.



modtheworld44

 

[Barren Realms 007]

Actually your figures could be off quite a bit on this since the scale only reads 0.2g. That means it could range from .16g - .24g in weight. You should think about getting you a scale that reads at least .05g increments so you can tell better what you are going to recover, .005g scale would work even better.

Have patience you are getting there. How many pounds of boards did it take for you to remove the traces?

 

[Palladium]

Actually your figures could be off quite a bit on this since the scale only reads 0.2g. That means it could range from .16g - .24g in weight. You should think about getting you a scale that reads at least .05g increments so you can tell better what you are going to recover, .005g scale would work even better.

Have patience you are getting there. How many pounds of boards did it take for you to remove the traces?

Wow! I can't even imagine trying to run down .2 grams!

 

[modtheworld44]

Actually your figures could be off quite a bit on this since the scale only reads 0.2g. That means it could range from .16g - .24g in weight. You should think about getting you a scale that reads at least .05g increments so you can tell better what you are going to recover, .005g scale would work even better.

Have patience you are getting there. How many pounds of boards did it take for you to remove the traces?

Can't really say how many pounds because I peeled only the biggest and longest traces from 4 boards and left the rest for after the test.This way I would have some numbers to work with as a base.Thanks in advance



modtheworld44

 

[modtheworld44]

Actually your figures could be off quite a bit on this since the scale only reads 0.2g. That means it could range from .16g - .24g in weight. You should think about getting you a scale that reads at least .05g increments so you can tell better what you are going to recover, .005g scale would work even better.

Have patience you are getting there. How many pounds of boards did it take for you to remove the traces?

Wow! I can't even imagine trying to run down .2 grams!

Palladium

Think of a pile of powder smaller around than a plain M&M. :mrgreen: Thanks in advance.



modtheworld44

 

[solar_plasma]

assuming a Cu thickness of 200micrometer (thick layer boards)
assuming the density of Cu and Au are so much higher, that the weight of plastic is not significant

I come to an Au thickness of 0,08 micrometers or 3,26 microinches.

I am not sure if my calculation is correct, but it sounds plausible to me. Don't know if you can use this for anything, I've just been curious.

Inaccuracy I guess to be at -50% to +100% (Cu layer 100-400micrometer). So I would say 1,6-6,5 microinches Au.

If the plastic garbage should be significant, we might come to a goldplating of 10 microinches or more (light goldplating), which I would expect at least:http://www.goldnscrap.com/index.php/scrap-gold-plated/83-estimating-the-value-of-gold-plating

Since I am not too far off from what should be expected (like a decimal power or more), I think my calculation is valid.

 

[Palladium]

Inaccuracy I guess to be at -50% to +100%

You can't argue with them numbers ! :lol:

 

[acpeacemaker]

These boards kind of reminded me of the ones I had in the link. If really into stripping the traces. You might try running a propane torch across the top until the mask bubbles. Doesnt take long. I did this and you can pick and pull with tweezers or a pair of semi dulled *****. Saved me a little time.
http://tinyurl.com/n9dv9zf
-Andrew

 

[Barren Realms 007]

Actually your figures could be off quite a bit on this since the scale only reads 0.2g. That means it could range from .16g - .24g in weight. You should think about getting you a scale that reads at least .05g increments so you can tell better what you are going to recover, .005g scale would work even better.

Have patience you are getting there. How many pounds of boards did it take for you to remove the traces?

Wow! I can't even imagine trying to run down .2 grams!

Me either, I would just throw it in the stock pot. :lol:

 

[solar_plasma]

Inaccuracy I guess to be at -50% to +100%

You can't argue with them numbers ! :lol:

No, as I said, I don't know if this has any use :lol: , but while the axiomes might be incorrect the calculation is valid, isn't it? I think the biggest problem is not to know how much pastic is following.

 

[kurtak]

These boards kind of reminded me of the ones I had in the link. If really into stripping the traces. You might try running a propane torch across the top until the mask bubbles. Doesnt take long. I did this and you can pick and pull with tweezers or a pair of semi dulled *****. Saved me a little time.
http://tinyurl.com/n9dv9zf
-Andrew

Yap - I just did a batch of boards like these about 4 months ago & that is just what I did - worked great

Kurt

 

[modtheworld44]

These boards kind of reminded me of the ones I had in the link. If really into stripping the traces. You might try running a propane torch across the top until the mask bubbles. Doesnt take long. I did this and you can pick and pull with tweezers or a pair of semi dulled *****. Saved me a little time.
http://tinyurl.com/n9dv9zf
-Andrew

Yap - I just did a batch of boards like these about 4 months ago & that is just what I did - worked great

Kurt

kurtak and acpeacemaker

Thanks for those tips will try that now that the boards are depopulated.



Update for yall


Here's all the fully gold plated pins I got from these boards and a picture of the different kinds and sizes of pins in the batch.How much gold yall think will come from this batch?Thanks in advance.



modtheworld44

 

[solar_plasma]

max. 1g ...wish you to get more, but I think 0,5-1,0g is safe. Heavy plating, but big parts = less areal.

 

[kurtak]

I have run something like 40 - 50 pounds (or more) of pins from boards of that type/era (70s early 80s) over the course of the last 4 years & they tend to run about 3 grams per pound (plus/minus a bit)

here is a link to some pics of foils from a batch of pins of this type I did back in 2011 :arrow: http://goldrefiningforum.com/phpBB3/viewtopic.php?f=37&t=15324&p=155859&hilit=incineration#p155859 I got 28 grams refined gold from that batch so it must have been a 8-10 pound batch

It was one of my first large batch runs so I remember the pins very well - they were from this type/era boards

Don't waste your time doing the pins - the fingers - the traces all as separate batches - get all you plated from the boards harvested & then run it as A batch

Kurt

 

[solar_plasma]

I love it, how close to your big lot yield numbers I guessed, based on the few small batches of every kind, I have my experience from! 8)

 

[modtheworld44]

update for yall

The pins are done and gold is dropped,but it will be tomorrow before I'll have the final results for them due to rain.Here's the ceramic chips that come off the boards,plus some gold legged epoxy chips.Thanks in advance.



modtheworld44