jimdoc
Well-known member
watcher6880 said:
According to that article 200 platters would be $20. Figure your time and chemicals, how is that worth your time and effort. I would just sell them for the aluminum and be done with it.
Jim
cpu hard drives
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According to that article 200 platters would be $20. Figure your time and chemicals, how is that worth your time and effort. I would just sell them for the aluminum and be done with it.
Jim
watcher6880
Well-known member
This is what I am paraphrasing from the URL I just listed:
" Improve
It's taken me just about forever, but I've finally found some way to answer the simple question "How much platinum is in these hard drive platters showing up on Ebay for salvage?" "The Chemistry of Computing" over at extremetech.com (article2/0,2845,1946290,00.asp) has all the facts: surface layer of Co-Cr-Pt alloy is 40-50% platinum, and the layer is ~30 nm thick. I don't have a hard drive platter in front of me, so let's just forget about the hole in the middle for a moment, so one platter from a 3.5" disk is 3.14*(3.5/2)^2=10.4 sq inches or 67.2 cm^2 ... times the 30 nm thickness (3x10^-6 cm) is 2.0x10-4 cm^3, times the (optimistic) 50% Pd, times the density of Pt (21.45 g/cm^3) and I estimate one platter has at most 2.2 mg Pt. As of 08/29/2008, the platinum spot price was 1470.00 USD per troy ounce, or more usefully, 4.73 cents per miligram. So, congratulations, you've just spent an hour of time and three cents of chemicals (just a guess, probably high) to reclaim 10 cents of platinum, probably still contaminated with cobalt and chromium depending on your recovery method. I hope you bought a whole bunch of platters cheap and rode a bike to pick them up because I doubt you'll be paying for gas let alone the shipping with the platinum. Or hope those early hard drives used a much thicker layer....
Read more: http://wiki.answers.com/Q/How_much_platinum_in_a_hard_drive#ixzz36M9tbBOM"
" Improve
It's taken me just about forever, but I've finally found some way to answer the simple question "How much platinum is in these hard drive platters showing up on Ebay for salvage?" "The Chemistry of Computing" over at extremetech.com (article2/0,2845,1946290,00.asp) has all the facts: surface layer of Co-Cr-Pt alloy is 40-50% platinum, and the layer is ~30 nm thick. I don't have a hard drive platter in front of me, so let's just forget about the hole in the middle for a moment, so one platter from a 3.5" disk is 3.14*(3.5/2)^2=10.4 sq inches or 67.2 cm^2 ... times the 30 nm thickness (3x10^-6 cm) is 2.0x10-4 cm^3, times the (optimistic) 50% Pd, times the density of Pt (21.45 g/cm^3) and I estimate one platter has at most 2.2 mg Pt. As of 08/29/2008, the platinum spot price was 1470.00 USD per troy ounce, or more usefully, 4.73 cents per miligram. So, congratulations, you've just spent an hour of time and three cents of chemicals (just a guess, probably high) to reclaim 10 cents of platinum, probably still contaminated with cobalt and chromium depending on your recovery method. I hope you bought a whole bunch of platters cheap and rode a bike to pick them up because I doubt you'll be paying for gas let alone the shipping with the platinum. Or hope those early hard drives used a much thicker layer....
Read more: http://wiki.answers.com/Q/How_much_platinum_in_a_hard_drive#ixzz36M9tbBOM"
watcher6880
Well-known member
I'm pretty sure it's the whole disk... seems like both sides look identical in nature so... I guess one would assume the entire disk is coated that way... I may be wrong but it is a guess.
watcher6880
Well-known member
Gold in beer cans? That wasn't a joke I assume??
Geo
Well-known member
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=60&t=12195&hilit=beer
lol.
lol.
kuma
Well-known member
Teeheehee :mrgreen:
goaldspektre
Well-known member
- Joined
- Sep 17, 2009
- Messages
- 56
Don't aim for Pt when the Ag is easier and the Au even more so.Gold is everywhere, easy to get if you think hard enough.And don't bother with mis givings and nay sayers.BTW tons of Pt in ram chips that they won't tell you here.Refining is easy,a monkey could do it!I have refined for twenty years and the bs i've heard here is sickening.Harold,Steve,GSP and a few others know what they're talking about.The rest I would question because I've never heard some of the crap i've heard here! I posted some bs and got some stupid responses that justified my two cents.Patnor has a great way of doing chips of all types,awesome technique in my books.Steve's methods always work, ask GSP a question about scrap refining/reclamation and there's an answer.Everyone else thinks they know it all with "have you read Hokes book?"Uh yea I did and in todays world Hoke isn't the definitive answer.Harold is King in the world of refining,listen to him.Incinerate , fume hood....etc.Most of this forum is obviously scrap reclamation.If you want more money sell E-scrap to China.If you want to refine gold buy karat scrap,dental,eyewear,or even plated!Btw when I stated there was Pd in Ram chips...you need a tonne to get an ounce so I would say keep working at your day job like the Hoffmans should have!
Rob in Canada
Rob in Canada
Geo
Well-known member
ummm.... ok.
joem
Well-known member
where the heck did that come from? :shock:
i know personally what members of this forum can do to help each other and i have seen almost every topic discussed by the most knowledged and the least, your comment has not brought any helpful information to this topic.
i know personally what members of this forum can do to help each other and i have seen almost every topic discussed by the most knowledged and the least, your comment has not brought any helpful information to this topic.
