How to remove arsenic from sulfuric acid slag?
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How to remove arsenic from sulfuric acid slag? I’ve seen people use methods involving mixing sulfuric acid, nitric acid, and other substances together; I don’t understand why this is done. Could someone with more knowledge explain the principle behind it and tell me the appropriate amounts of each reagent to use?
I wonder what the arsenic content in the slag mentioned by the original poster is, and why is it necessary to remove arsenic? Understanding these will help you.
The method of mixing sulfuric acid, nitric acid, etc. mentioned by the poster seems to involve oxidizing arsenic and then reacting it with acids, so that the arsenic ends up in the acid solution. I’m not sure if what I said is correct.
Because the slag can be used as iron ore after arsenic is removed (from a content of about 3% to 0.05%), how?
If there are no special requirements, a concentration of 0.03% is very low and will not have an impact on subsequent processes. If it needs to be processed, it can be leached using 1% dilute sulfuric acid; arsenic moves into the liquid, which is then treated using the lime-iron salt method. If the slag contains more than 60% iron, it can be sold directly to steel mills as a raw material for production; otherwise, the iron content must be increased.
You could try using flotation.
What are the specific processes and methods of flotation? ? ?
It’s 3% dropping to 0.05%, not 0.03%. When dilute sulfuric acid dissolves arsenic, does it also dissolve the iron present in it?