4metals said:I see you're from Egypt (see it is good to post where you're from) We had a member who was taught by a group from, I believe, Egypt and he was doing it poorly. This thread will be very helpful to you.
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=85&t=22243
FrugalRefiner said:Ammonia can cause difficulties in dropping PGMs and under certain circumstances it can create explosive compounds. Stick with sulfamic acid.
Dave
4metals said:What material did you start with and how much material are you processing at a time?
The picture you posted shows metal in need of further processing. You can do better. Read the thread I posted the link for above.
thanksUncleBenBen said:http://goldrefiningforum.com/phpBB3/viewtopic.php?f=85&t=22194
Here you go. Skip no steps. Do everything Harold recommends.
You mean add a gold button before i filter it and after the reaction stops filter it and take back what remains of my gold button?, and if i test my AR solution after the drop with Stanous Chloride and its negative i am fine right..?FrugalRefiner said:I wouldn't add sodium hydroxide before reducing my gold.
If your goal is to eliminate excess nitric acid, there are better ways to go about it. Add in increments to avoid adding too much, add a gold button to consume the excess, use sulfamic acid...
Depending on what other metals are in solution with your gold, the sodium hydroxide could cause other metals to precipitate, contaminating your gold.
You also need your solution to be acidic to react with the SMB to create SO2. Bringing your solution too close to neutral could cause problems reducing your gold.
Dave
Correct. If you're interested in accountability, weigh the button before you add it, and again after you remove it.arisas said:You mean add a gold button before i filter it and after the reaction stops filter it and take back what remains of my gold button?, and if i test my AR solution after the drop with Stanous Chloride and its negative i am fine right..?
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