1mysurveymail
Well-known member
- Joined
- Sep 11, 2013
- Messages
- 50
Martijn said:Only the ends are plated. Cut them off and use AP.
Works fine.
Hi, I put some gold contacts from ribbons in 55 percent HCL, about 2 liters and 500ml H202, it has been 20 days and I see few finger dissolved and some very small flakes floating. Most of contacts did not come loose. What should I do? Very few warm daysYour dissolved gold will cement out on copper trace ends underneath the coating if you don't cut the ends off and digest all copper completely. You will loose gold that way.
If you used a cap or two with H2O2 and air bubbling in stead. It would be cheaper and it creates turbulence that may dislodge the fouls. It may also be faster.Hi, I put some gold contacts from ribbons in 55 percent HCL, about 2 liters and 500ml H202, it has been 20 days and I see few finger dissolved and some very small flakes floating. Most of contacts did not come loose. What should I do? Very few warm days
I'm lucky enough to have a lab-grade hot plate. I just let my beaker of fingers in HCl sit there just at the boiling point for hours at a time, then cool, then reheat, then cool. Over and over. This seems to work great for getting the foils to fall off. It alters the solubility of various compounds over and over, facilitating the removal of the unreactive gold from the base metal substrate.If you used a cap or two with H2O2 and air bubbling in stead. It would be cheaper and it creates turbulence that may dislodge the fouls. It may also be faster.
To loosen the foils you may need to use a water spray bottle.
How much ribbons did you put in? With 2 L HCl I'm guessing a lot. Was this your first attempt at AP?Hi, I put some gold contacts from ribbons in 55 percent HCL, about 2 liters and 500ml H202, it has been 20 days and I see few finger dissolved and some very small flakes floating. Most of contacts did not come loose. What should I do? Very few warm days
I have put it all in about 6 poundsHow many pounds will you be running per batch?
I have put in about 5 or 6 pounds, I thought I can always change it to AR later by adding some nitric but if the foils come of I can reuse the solution. Now because I have added some H2O2 not sure how to deal with it. It has been 21 days nowHow many pounds will you be running per batch?
thank you, yes this is my first try, I heard that H202 can dissolve gold, even if it is 3 percent concentration? What can I do now to prevent gold to cement on base metals?Ok. I guess this is your first batch.
Take one or a couple ribbons and put them in AP with an air bubbler, without H202, and watch and learn.
Once that works, and you know how to rinse, decant, filter, wash, etc. Then scale up a bit and get more experience. Gold will not only be as clean big foils in there. You will have some powder or tiny flakes.
Once your process and you are tuned in, go for full batches.
Keep it small to observe better and learn.
Have you read this thread:?
https://goldrefiningforum.com/threads/acid-peroxide-process-information-thread-q-as.12914/H2O2 with HCl can dissolve gold. Dissolved gold will cement out on base metals.
Do not make AR from dirty HCl. (AP)
Trash in trash out.
Take you time to learn and ask.
After I filter the foils out could I try to precipitate any dissolved gold in it by SMB?No need to prevent that. Let it cement out and collect with the foils.
Prevent the dissolving of more gold by not adding peroxide anymore.
"H2O2 with HCl can dissolve gold. Dissolved gold will cement out on base metals." This means that if gold dissolves in HCL Peroxide solution the copper in the solution will precipitate the gold back out of the solution?thank you, yes this is my first try, I heard that H202 can dissolve gold, even if it is 3 percent concentration? What can I do now to prevent gold to cement on base metals?
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