John paul III - 28-12-2022 at 07:46
I have a few tons of tailings from an arsenic mine. It used to be arsenopyrite, after roasting its mostly iron oxides with some (2.6%) arsenic
contamination. Is there a way to remove the arsenic or concentrate the iron oxides?
Rainwater - 29-12-2022 at 03:48
I ran into some ore like that a few months ago.
It wound up being processed with gold ore and entered into solution,
scared the crap out of me when i finally figured out what it was.
I used a ball mill then concentrated NaOH leaching to break up the rock, then panned the concentrates and performed a magnetic seperation to pull out
the iron.
KNO3 + HCl
Ended up with a very consentrated arsenic solution.
Not sure if this would be economical on a large scale, and its deffenetly very toxic.
not the easiest method. But most the reagents are recoverable for the next run