Gold recovery

[mosfetta]

Hello everyone.
I read, I reread, I seem to understand then someone writes other things that take me back or even to the beginning.
Does anyone have a method to post for machining parts for cell phones, computers and the like?
Yes!!! I always get something but it seems to me that some gold is left behind.
Can someone please show me a link to a valid and safe method.
please don't tell me to read hokes. Thank you

 

[BGDOCK]

I’m still learning my self how much weight are you processing ?
I do it on a small batches maybe 20 pounds so far .
It goes some thing this
Take phone apart
Separate the plastic, glass, batteries , boards, ribbons and cameras into piles
I pull all the metal off the boards
Run through AP
The ribbons I still haven’t processed yet , probably burn classify, gravity separate w/ rinse then process
After soaking the boards in AP I separate the chips from caps
Chips ash, classify , gravity separate process
Boards after AP soak shred incinerate rinse , smelt run trough cell ? ( I’m still holding on to boards now kinda working on this part still) it’s a big picture you can fill in details as you see fit plenty of info out there Try and research the process yourself as well.
Good luck
Jeff

 

[Yggdrasil]

Hello everyone.
I read, I reread, I seem to understand then someone writes other things that take me back or even to the beginning.
Does anyone have a method to post for machining parts for cell phones, computers and the like?
Yes!!! I always get something but it seems to me that some gold is left behind.
Can someone please show me a link to a valid and safe method.
please don't tell me to read hokes. Thank you

Why?
I know it is not directly applicable for e-waste, but the chemistry is valid!

And the safety and waste treatment is absolutely important!

 

[mosfetta]

I’m still learning my self how much weight are you processing ?
I do it on a small batches maybe 20 pounds so far .
It goes some thing this
Take phone apart
Separate the plastic, glass, batteries , boards, ribbons and cameras into piles
I pull all the metal off the boards
Run through AP
The ribbons I still haven’t processed yet , probably burn classify, gravity separate w/ rinse then process
After soaking the boards in AP I separate the chips from caps
Chips ash, classify , gravity separate process
Boards after AP soak shred incinerate rinse , smelt run trough cell ? ( I’m still holding on to boards now kinda working on this part still) it’s a big picture you can fill in details as you see fit plenty of info out there Try and research the process yourself as well.
Good luck
Jeff

why AP and not nitric, is there a valid reason or can I also use nitric?

 

[Yggdrasil]

why AP and not nitric, is there a valid reason or can I also use nitric?

Price is one, metastannic acid is one.

 

[BGDOCK]

AP can be reused
It’s easy to make
Like Yaggdrasil it’s dissolves Tin And base metals
I like the sit and forget part it allows me to do other projects while the AP is working .

 

[cejohnsonsr1]

why AP and not nitric, is there a valid reason or can I also use nitric?

Because before you can begin to refine you have to separate the gold from everything else. Nitric isn’t suitable because it dissolves nearly everything and you wind up with a conglomerate of metals in solution that can be anywhere from very difficult to impossible to separate.

 

[BGDOCK]

why AP and not nitric, is there a valid reason or can I also use nitric?

AP is cheaper
Dissolved the tin and base metals leaves foils intact
AP is easy to make
AP can be reused