gold recovery

Hey guys new member here. I am refining what I want to call creek bed black sand. After clarifying down to 100 grade screen, using a low gravity separator and using a magnet to remove most of the iron. Mixing 1 part charge, 1 part Borax, 0.5 part potassium nitrate. Dropping silver as a...

How much gold should I expect from this 1.5 KG old CPU lot that I bought from an individual seller's website? (I asked the guy if he could do a thumbs up to prove it was him selling it)

Anybody with experience or thorough testing of various precipitating agents that could help me determine best gold precipitation methods or agents? I have heard SMB is very good, but I've also heard about various other such as FeSO4, Na2S, Ascorbic acid, Zinc, SO2 gas, Activated Carbon. These...

Hello everyone, I am part of a startup that is venturing into the world of precious metal recovery from electronic waste. We understand that this is a complex and delicate process, and we are keen on doing it right. We are currently seeking advice and guidance from experienced professionals in...