Non-Chemical Kuma's first go at recovering I.C. gold

[kuma]

Hi Geo , how are tricks?
I hope that your all good!
Many thanks ( again! ) for the heads up on that chief!
What you say makes sense to me , I've heard of " karat " gold being reffered to as " pure " gold before , and I can see how using this term can be missleading.
I suppose that it would depend on who you were talking to and the exact nature of the conversation , i.e. wether or not your on the same page! :lol:
It's good to hear that angel hair / bonding wires are still considered 24k , otherwise that would have meant that I was living in a * dream world * for quiet some time , and I would have something embarrassing to admit to my now supprisingly optimistic girlfriend! :lol:
Many thanks Geo!
Wishing you all the best and sending my kind regards ,
Chris :mrgreen:

 

[samuel-a]

I'm not so sure as to the 'official' gold standards.

I can only tell you how i see it:

.999 - .9995 - can be called 24K (for jewellry making).
.9999 - bullion 'grade' (investment / high-tech indusrty)
.99999 - .999999 - ultra pure (analytical chemistry / high-tech indusrty)

 

[Geo]

that would be 1 ppm? i couldnt imagine i would ever see anything like that, of course 1% impurity would be hard to see with the naked eye.

 

[qst42know]

Search gold bonding wire. They don't state a percentage but a trace of berylium is often mentioned.

http://www.coininginc.com/gold_wire_and_ribbon.asp

http://heraeus-contactmaterials.com/en/products/audr/productpage_smt_adhesives_2.aspx

http://www.gold.org/technology/uses/electronics/bonding_wire/

 

[Meh]

I'm not sure what impact a few PPM will have on purity , but either way it's always cool to learn something new!

Kuma

15 ppm contaminate = 0.0015%
That is, the gold content is 99.85%

Or perhaps 99.9985% pure :wink:

 

[samuel-a]

Or perhaps 99.9985% pure

1 ppm is 1/1,000,000 = 0.000001 which would be 0.0001%
To convert to precentage you would divide by a factor of 10,000
15 ppm = 15/10000 = 0.0015%

To convert to mass:
Say you have 100 grams gold bar with 15 ppm declared contaminants:
15 ppm = 0.0015% * 100g (gold bar) = 0.15 grams contaminants
100g - 0.15g = 99.85g gold content

99.9985% pure gold would accounts for 0.15 ppm contaminants.

I'm pretty sure about that... though, you got me thinking i might have missed something here.

 

[Harold_V]

Say you have 100 grams gold bar with 15 ppm declared contaminants:

Just a compliment on your proper use of the word contaminant. Contaminant(s) is/are the unwanted substance(s) that contaminate. For clarity, gold would not contain contaminates--------it would contain contaminants.

Harold

 

[kuma]

Hello all!
How are tricks today? I hope all is well! :mrgreen:
I was starting to get somewhat confused by all of the numbers with regards to parts-per-million and the maximum ppm contaminants permissible in gold before it was no longer deemed 24k ( numbers aren't my strong point at all! :| ) , so I used google again , and searched for " minimum parts per million 24 carat gold " to see if I could find any official standard , and I came across this from the Royal Canadian Mint ;

99999
Describes gold of extremely high purity (only 10 parts per million impurity).

9999
Describes 24-karat gold of high purity (only 100 parts per million impurity). Used to designate Gold Maple Leaf bullion coins.

From this page ;

http://tinyurl.com/78x6lqx

So if I'm reading this correctly , 100 ppm impurity is still permissable as 24k , and as this is from from the Royal Canadian Mint this would be correct ? :roll:
Qst42know , thank you for the links and the heads up on the possible presence of Berylium , I will have a good look into it! :shock:
Many thanks for the replies guy's , I only wish that I had of listened in maths lessons at school !
All the best for now , and kind regards ,
Chris :mrgreen:

 

[Geo]

honestly,i depends on your intentions.if your going to sell your gold to a jeweler then i imagine your gold will need to be a certain purity.if you want to sell bullion grade on Ebay and you want to be ethical then it needs to have a certain purity.if you will most likely send it to a refiner for resale value or even a stamped round or bar you can do that at any purity.if i were going to make bars to horde i would want it to be as pure as i could make it.

 

[kuma]

Hi Geo , how are things?
I hope your well!

honestly,i depends on your intentions.if your going to sell your gold to a jeweler then i imagine your gold will need to be a certain purity.if you want to sell bullion grade on Ebay and you want to be ethical then it needs to have a certain purity.if you will most likely send it to a refiner for resale value or even a stamped round or bar you can do that at any purity.if i were going to make bars to horde i would want it to be as pure as i could make it.

Well , my long term intentions are to refine any gold that I recover to as pure as I can possibly get and basicly just horde and save it , for sure! 8)
The only real reason that I was wandering at what actual level of purity gold can be considered 24k is because for quiet some time I have believed that bonding wires are a full 24k , and I've told my girlfriend and a couple of friends that it is too.
Basicaly it would just be good to know the actual carat , if it can still be classed as 24k with up to 100 ppm contaminants , that's good enough for me for the sake of conversation , at least I wouldn't have to backtrack and tell people that it's only 22k , or even 18k.
In a nutshell , free 22k gold is cool , very cool , but not as cool as free 24k , 8) :lol:
Thanks again chief!
All the best and kind regards ,
Chris :mrgreen:

 

[sebass]

My name is Sebastian, are new forum, and I started to get gold recycling, I began a process same as you, I selct around 600 grams of large and small faces, Chipsets on the motherboard, then we burned in the fire, until they become white and easily broken. after that we smash with a hammer, and now I have a black powder with visible gold thread. What is the next process? To make nitric acid and let boil 1 hour? then wash and put the remaining waste hydrochloric acid and nitric acid to make aqua regia. then SMB.? forum I saw that someone managed to pull the threads of gold proceeds without chemicals, know any way? you how much gold you out? in all your process. Sorry for my English, I use google transalte

 

[butcher]

Sebastian, welcome to the greatest place to learn refining in the world, here is my answer to help you, do not try anything more, until you know exactly all of what you need to know to make your gold pure (I feel at this point you would lose your gold if you do not take this advice),

If there was solder involved (nitric would give trouble with tin, a gelatin that gives many troubles), if the tin was roasted to a red hot it should be oxidized and can be washed with an HCl boil and rinses, then you can dissolve the base metals (you do not want to dissolve gold until the other metals are removed, there is tons of information on processes on the forum for just about any precious bearing material you can think of search and reading are your best bet for learning.

I suggest you do not do anything with the material you have until you read Hoke's book and perform the experiments, her book will teach you what you need to understand to be able to recover and refine your values.

We can answer a question, but you would not learn the whole process or all of the problems you would run into along the way, basically we cannot tell you how to refine, to learn how you must study, but we can help after you study and gain an understanding of the basic principles, then we can help fill in the gaps you may not quite understand.

On the surface it seems as though it should be simple to recover and refine these metals, well this is not true, there are many complications and facts you need to understand, this is an art and a science that takes a lot of hard work to learn, it is not hard to learn but you have to be willing to read and work for your education, we cannot put it in your head even if we answered the next ten thousand questions you had on how to do this or how do you fix a mistake you made.

Keep reading the forum everything you need is here free for you to learn, as long as you are willing to study the information you will be successful.

Welcome to the forum, this is the best answer I can give you to help you get started to learn to recover and refine, it is up to you now to help yourself with the information we have provided here for you

 

[g_axelsson]

Great thread but I found two things that I just have to correct.

So , I had pyrolyzed , crushed and ground...

Pyrolyzing is heating without oxygen, driving off gases and leaving coal, ashes and gold. What you did was incinerating the chips, adding oxygen that also burns off the coal, leaving only ashes and our gold. Okay now I've gotten that off my mind, time for the next point...

Or perhaps 99.9985% pure

1 ppm is 1/1,000,000 = 0.000001 which would be 0.0001%
To convert to precentage you would divide by a factor of 10,000
15 ppm = 15/10000 = 0.0015%

To convert to mass:
Say you have 100 grams gold bar with 15 ppm declared contaminants:
15 ppm = 0.0015% * 100g (gold bar) = 0.15 grams contaminants
100g - 0.15g = 99.85g gold content

99.9985% pure gold would accounts for 0.15 ppm contaminants.

I'm pretty sure about that... though, you got me thinking i might have missed something here.

I think you still misses something...
1 ppm = 0.0001% and 15 ppm = 0.0015% correct so far, but you forget that % means *0.01 so
1% of 100g = 1g which means 15 ppm = 0.0015g and we got 99.9985g gold. You got it right at the end but the middle part was wrong by a factor of 100.

We could get really close to five niners purity by just an acid clean and melting. Cool! :mrgreen:

/Göran

 

[samuel-a]

I think you still misses something...
1 ppm = 0.0001% and 15 ppm = 0.0015% correct so far, but you forget that % means *0.01 so
1% of 100g = 1g which means 15 ppm = 0.0015g and we got 99.9985g gold. You got it right at the end but the middle part was wrong by a factor of 100.

Right, i see it now. Thanks.

 

[patnor1011]

My name is Sebastian, are new forum, and I started to get gold recycling, I began a process same as you, I selct around 600 grams of large and small faces, Chipsets on the motherboard, then we burned in the fire, until they become white and easily broken. after that we smash with a hammer, and now I have a black powder with visible gold thread. What is the next process? To make nitric acid and let boil 1 hour? then wash and put the remaining waste hydrochloric acid and nitric acid to make aqua regia. then SMB.? forum I saw that someone managed to pull the threads of gold proceeds without chemicals, know any way? you how much gold you out? in all your process. Sorry for my English, I use google transalte

:arrow: http://www.goldrefiningforum.com/phpBB3/viewtopic.php?f=52&t=11827

 

[larryb]

for some reason i cant put my finger on yet, i feel as though you may have washed some of your gold out of your pan. when your done with the first panning, collect your gold and re-pan your material and see if anything comes out.here's a trick i used to collect gold fines from concentrates, its not new and alot of people do it when prospecting.get a piece of solid corrugated pipe and slice it length wise into two pieces (about five foot).use one half and fasten to a board with a screw in each end.incline will depend on size of the material and water flow.pass water down the middle of the pipe and spoon your material into the stream of water (a garden hose will work).use a tub to catch material coming out the end. this is a makeshift mini sluice.it will speed the process up so much you will be amazed.

I've seen that mentioned on another forum. Sounds like it works very well, even for fines. Thanx for sharing. lb

 

[evL]

Hello Folks,
I wanted to thank you Kuma for the Wire Bonding .pdf that you gave us. I think in was in
your ninth post from the start. I enjoyed that information. Good Day...

[ evL ]