Anyone have a tungsten heat spreader from a ceramic pentium pro laying around? Could you throw it on a scale and let me know the weight? I’m working on separating some tungsten from gold and silver and would appreciate it greatly. Thanks.
Tungsten heatspreader on ceramic pentium pro
- Thread starter Wonka
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29-30g
I could be wrong, If I remember right.... I don't think the lids are elemental Tungsten...if that's what you're looking for.
As a side note...most modern house hold circuit breakers have Tungsten contact points with a silver plating.
It's a tungsten copper sinter brazed to the ceramic cpu housing with silver solder. The 29-30g figure is after the copper and silver are extracted from the heat spreader. I've sold 200+ pounds of them in one go and they XRF as 99.9% tungsten when properly removed from double gold cpus.
The above photo is about 40 pounds of clean pure tungsten heat spreader plates.The few with yellow and blue salts on the surface are residues of tungsten oxides.
Steve
The above photo is about 40 pounds of clean pure tungsten heat spreader plates.The few with yellow and blue salts on the surface are residues of tungsten oxides.
Steve
How did you acquire the bar?
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It’s all explained in another thread. These heat spreaders have to be a copper alloy or something. I had 34 K5s and separated them out and they completely dissolved in nitric acid. No heat. Just trying to find a good way to separate the tungsten from gold.
You said "bar of 100g" which indicates that it has been processed into a bar by melting or sintering. If you want good answers, use a precise language, we do not read minds.
The CPU lids are not bars.
And they are not created equal, they can be designed and produced differently.
If you leach them (Copper lids) in Nitric the Gold foil will release relatively quick at which point you take the lids out and wash the foils off.
There is no need to dissolve all.
So why did you create another thread for the same material?
Edit to add:
The reason I ask is that if you do not have a specific reason, I will merge this thread with the original thread.
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Fully dissolving or melting any quantity of tungsten would be quite the feat in a home lab. I suspect you have tungsten oxide contamination (as I repeatedly pointed out in the other thread) in your "mixed material ".
As a side observation to your other thread on Pentium Pros, I'm going to go out on a limb and guess you got scammed into buying "gold topped" cpus (the types with tungsten spreaders) that had been previously processed to selectively strip the top plating gold and subsequently "painted" with gold colored paint and restenciled to make them appear as fresh cpus. I have no evidence that this is indeed the case, except the lack of Au you recovered from the 70 cpu batch you ran. Never underestimate peoples greed and ability to deceive others for personal gain. Ebay is flush with these types of individuals. Buyer beware.
"There is a sucker born every minute" P.T. Barnum
I certainly hope I'm wrong about my observation above, but the lack of results from cpus with widely known yields, it seems to be the correct conclusion.
"When you have eliminated the impossible, what is left, no matter how unlikely, is the truth. | Arthur Conan Doyle/Sherlock Holmes"
Steve
As a side observation to your other thread on Pentium Pros, I'm going to go out on a limb and guess you got scammed into buying "gold topped" cpus (the types with tungsten spreaders) that had been previously processed to selectively strip the top plating gold and subsequently "painted" with gold colored paint and restenciled to make them appear as fresh cpus. I have no evidence that this is indeed the case, except the lack of Au you recovered from the 70 cpu batch you ran. Never underestimate peoples greed and ability to deceive others for personal gain. Ebay is flush with these types of individuals. Buyer beware.
"There is a sucker born every minute" P.T. Barnum
I certainly hope I'm wrong about my observation above, but the lack of results from cpus with widely known yields, it seems to be the correct conclusion.
"When you have eliminated the impossible, what is left, no matter how unlikely, is the truth. | Arthur Conan Doyle/Sherlock Holmes"
Steve
Moving on to another important lesson anyone reading this should pay close attention to is that the OP jumped into running a batch of cpus without first doing a small scale test on the scrap. Any time you are working with a new or unknown source of scrap, even if you are familiar with the scrap in general, it is of utmost importance to always perform preliminary "acquaintance tests" to ascertain that you are not jumping into a scam artist trap head first. Hoke talks of acquaintance testing in detail and she wrote her books many years before e-scrap was a thing.
If you are working with a new scrap source, these test can lead you down a path of discovery PRIOR to you committing your valuable time and resources for an unknown result.
"Feet first the first time"
This cautious and systematic approach can not only reveal shortcomings of your protocols, equipment, and selected reagents, but as well it can reveal possible nefarious activities related to the batch in question that you may have never suspected or considered.
"True deduction can only be obtained through a certain amount of self annihilation. Sherlock Holmes "
I posted this in an effort to bring to the surface, that not all that is involved in processing precious metals is related to the chemistry. Much of your success in this field depends on your ability to suspend your own beliefs and make observations based solely on the hard facts in front of you. If you don't not take the time to make these small initial observations, it will inevitably come back to haunt you.
Steve
If you are working with a new scrap source, these test can lead you down a path of discovery PRIOR to you committing your valuable time and resources for an unknown result.
"Feet first the first time"
This cautious and systematic approach can not only reveal shortcomings of your protocols, equipment, and selected reagents, but as well it can reveal possible nefarious activities related to the batch in question that you may have never suspected or considered.
"True deduction can only be obtained through a certain amount of self annihilation. Sherlock Holmes "
I posted this in an effort to bring to the surface, that not all that is involved in processing precious metals is related to the chemistry. Much of your success in this field depends on your ability to suspend your own beliefs and make observations based solely on the hard facts in front of you. If you don't not take the time to make these small initial observations, it will inevitably come back to haunt you.
Steve
How do I find this other thread. For I have the yellow salt Tungsten nightmare currently. Thank You Gentlemen
Just search the forum for the keyword tungsten with Lazersteve as poster.
First in that will give you this thread:
https://goldrefiningforum.com/threads/tungsten-heatspreader-on-ceramic-pentium-pro.33241/post-355220
kurtak
Well-known member
Yggdrasil - your link here does not take you to a different thread - it just "refreshes" this thread to Steves second post in this thread
Kurt
I just presented an option to what can be found by the search function in the forum so I did not read it through.
Use the search function as Yggdrasil suggested, using “tungsten” as the topic and “lazersteve” as author. I found a few threads on the first page that may fit your needs. No, I am not going to link to them.
Time for more coffee.
Time for more coffee.
