Electrochemistry Sulfuric acid stripping cell PSU

[goldsilverpro]

How long do I have to wait for any black powder to settle after the cell operation? It's has been 12 hrs since I ran the cell with some low grade pins from slots, and the cell solution still dark / brown.

thanks
Kevin

Since I always treated the sulfuric cell as a continuous thing as opposed to a batch process, I never worried about getting it all the first time. If I did, I did and if I didn't, I didn't. I knew I would eventually get it all in the long run. Usually, overnight settling was good enough for me. However, I never let the solution get hotter than 110F and preferably not hotter than 100F. If you use too much current and it gets too hot, you can dissolve a lot more than the gold. In that case, settling can be more of a problem. To make things less problematic, the temperature is the most important thing.

 

[kjavanb123]

The cell was room temperature during the run, so it didn't get hot, does the color of solution look right to you ? I did maybe 60 grams of slot pins.

Regards,
Kevin

 

[Geo]

if thats all you ran, you may not have enough gold to be visible. slot pins only have like a fraction of a gram per ounce.

 

[kjavanb123]

Thanks Geo, I was trying to find out the value of precious metals for the boards I had, I guess I have to find another way , maybe chemical method.

Regards,
Kevin

 

[Marcel]

Thanks Geo, I was trying to find out the value of precious metals for the boards I had, I guess I have to find another way , maybe chemical method.

Regards,
Kevin

Melt them to a button and go for an XRF. :shock:

 

[Krazykrackerkarl]

probably a stupid question but how do you process the gold from the cell after you deplate?

 

[butcher]

To give you a simple answer to this question would only cause you problems, as I will not give you all of the details you will need, Laser Steve has made several posts on this subject, either a search on the subject, or I am willing to bet following the general reaction list and its links will lead you to the information you need, my simple answer dilute by pouring concentrated acid into water ( Caution never pour water into concentrated acid), wash powders and dissolve the gold into solution.