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We find that sulfamic acid is better than urea at eliminating excess nitric. And with the nails and sulfuric acid you are creating FeSO4. Not trying to criticize, just help.

Dave
Perfect , thank you . Also you do not need to wear kid gloves when giving me advice. I simply ask that it is done with the same respect that you would want.

Thanks
Nick
 
One thing that kids (my grandson included) really connect with is taking commonly available chemicals and things like iron nails and making ferrous sulfate that can be used in refining scrap. Or dropping gold from a solution using stump remover. It gets them reading labels and paying attention and it makes learning fun and practical.
I 100% agree.
 
if your gold is from the sulfuric cell and you are using aqua regia to dissolve it to clean it up the gold is finely divided with a lot of surface area. Lots of surface area means easy to dissolve. Add your solids to a beaker add Hydrochloric Acid to cover it by about 1" and heat it up. Then with a small dropper add drop by drop nitric acid. Go slow and it will begin to blow red when it stops add another drop of nitric. Go slow and you won't over add. Do it right and you don't need sulfamic or urea. The finely divided gold from the sulfuric cell makes this easy to dissolve.
 
if your gold is from the sulfuric cell and you are using aqua regia to dissolve it to clean it up the gold is finely divided with a lot of surface area. Lots of surface area means easy to dissolve. Add your solids to a beaker add Hydrochloric Acid to cover it by about 1" and heat it up. Then with a small dropper add drop by drop nitric acid. Go slow and it will begin to blow red when it stops add another drop of nitric. Go slow and you won't over add. Do it right and you don't need sulfamic or urea. The finely divided gold from the sulfuric cell makes this easy to dissolve.
I am happy to hear you say this because actually we had some of the Filtered gold sludge from the cell left and decided to dissolve it last night with the nitric that we made adding it in very very small doses and we got the super red angry looking solution you are talking of.
Quite honestly, it made me nervous because you could tell that it was a highly reactive or super angry solution so I parked it until I could do further research.
 
My oldest grand daughter (she is 11) came in from school last week telling me all about vinegar and salt. I was fairly shocked at just how much she knew about it. Maybe the refining talks we have is worth the effort.
 
The gold you dissolved was pretty pure if the solution remained red. So do you mean by angry looking the fumes it produced? When the reaction dies it means there is no more metal to react. If you have added too much nitric the reaction will still stop when there is nothing to react with. Then you have too much free nitric. If you get carried away it needs to be dealt with but if you were adding slowly, and the reaction stopped and did not re-start with another few drops, you are done and the nitric remaining shouldn't be an issue.
 
If you try to drop the gold and the solution starts to blow red again it is the gold the precipitant dropped re-dissolving and actually doing you a favor and eating up the last of the free nitric. If there is too much free nitric that is when you get into issues with over adding metabisulfite to drop the gold. But as an old Romanian assayer told me 50 years ago. Easy by easy!
 
My oldest grand daughter (she is 11) came in from school last week telling me all about vinegar and salt. I was fairly shocked at just how much she knew about it. Maybe the refining talks we have is worth the effort.
I am telling you from experience they are. For the amount of money I have spent versus the amount I would’ve been willing to spend to connect with my son blows me away. Not to mention this is pretty cool stuff.
 
If you try to drop the gold and the solution starts to blow red again it is the gold the precipitant dropped re-dissolving and actually doing you a favor and eating up the last of the free nitric. If there is too much free nitric that is when you get into issues with over adding metabisulfite to drop the gold. But as an old Romanian assayer told me 50 years ago. Easy by easy!
No, I had not tried to drop yet. I was simply adding nitric as you say easy by easy and never saw the solution turned that color of red on my other initial attempt. I followed Hokes steps but was using chemistry. Shop bought nitric and who knows how old that was.. Do you recommend heat when dissolving and or heat when precipitating?
 
Heat to dissolve and actually colder to precipitate. The cold makes the metabisulfite stay in solution a bit longer to be more effective. Small reactions you won't see the benefit of cold but on large drops it is effective.
 
I do have one other question since this seems to be going a lot better than prior. How would you all recommend getting gold out of rock or pyrites or quartz that has pyrite and gold?
 
That is way above my pay grade, all my career I have worked with secondary sources for gold and, well all 4 metals. The extraction from ore is another topic entirely. Based on what is in the rock some of it needs roasting and all of it needs crushing.

We generally tell folks to crush it up to a fine powder and screen it and pan off the lighter overburden. That usually is effective with quartz. But this is a good topic to start a thread about, just be very specific about the rock types and include photo's if possible. There are a lot of rock hounds here who can help you.
 
That is way above my pay grade, all my career I have worked with secondary sources for gold and, well all 4 metals. The extraction from ore is another topic entirely. Based on what is in the rock some of it needs roasting and all of it needs crushing.

We generally tell folks to crush it up to a fine powder and screen it and pan off the lighter overburden. That usually is effective with quartz. But this is a good topic to start a thread about, just be very specific about the rock types and include photo's if possible. There are a lot of rock hounds here who can help you.
Noted , and thank you . I think our next adventure might be the chips we have gathered. I will reach out again if we need help but I do think there is value in researching the processes rather watching YouTube or something. We really enjoy Hokes book.

Thank you again and hope it was not too painful.
 
After 4metals post I have edited this from its original form. Back to refining.

"while i believe shark's piling on was well-intended"

No it wasn't, it was meant to cause a pause so anyone reading this would think about why no comment was made on the other mentioned points. Quite often just a pause will bring things into a different view and cause one of those Ahha moments. If that fails, then we can try something else.

I have been known to check what forum is being posted in but quite often miss that as well.
"no it wasn't"? so you're acknowledging that you're just a bully that likes piling on when a guy's already getting beaten down, all for TRYING TO LEARN?

i've got news for you... there was already a "pause" before ygg and 'mr safety' decided to jump on him. just like they always do. you sure didn't need to jump on the pile to "cause a pause."

what goes on here against people who are just trying to learn, is sad.

i can see why you chose the moniker you did. and it has nothing to do with refining.
 
Master Nater why are you trying to disrupt this thread , apologies have been given and accepted and we have moved onto refining and recovery which is what members want to read.
 
"no it wasn't"? so you're acknowledging that you're just a bully that likes piling on when a guy's already getting beaten down, all for TRYING TO LEARN?

i've got news for you... there was already a "pause" before ygg and 'mr safety' decided to jump on him. just like they always do. you sure didn't need to jump on the pile to "cause a pause."

what goes on here against people who are just trying to learn, is sad.

i can see why you chose the moniker you did. and it has nothing to do with refining.
Your part right
, but as so often mentioned, you are showing your lack of research. My nickname, as well as how I got it and why I use it are posted on the forum. as for the rest your not even close. Better luck next time.

This is the last I have to say on this to you. You are are only here to start trouble and your only fair at it.
 
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