# making sulfuric acid from pyrite

I recently found a place with an insane amount of pyrite (we are talking about tons) already smashed into smaller pieces, and I'm wondering if there is any way of converting it into sulfuric acid.

I'm aware that this is possible:

$$\ce{4 FeS2 + 11 O2 -> 2 Fe2O3 + 8 SO2}$$ $$\ce{2 SO2 + 2 H2O + O2 -> 2 H2SO4}$$

but it requires to heat up pyrite to quite some temperature :/

Is there any chemical extraction method available?

• What's wrong with heating? Yes, chemical methods without heating are technically possible, but insanely costly. – Ivan Neretin Jun 14 '17 at 15:10

$$\ce{FeS2 + 18HNO3 → Fe(NO3)3 + 2H2SO4 + 15NO2 + 7H2O}$$