If you like that then you should look up some of the other early recipes for producing acids,
Oil of vitriol, sulfuric acid, could be created by roasting sulfur and potassium nitrate in presence of steam or by roasting green vitriol in an iron retort.
Can you produce or mine iron sulfate in-game? I can’t remember, you should be able to get it by roasting pyrite FeS2 to get iron(III)sulfate Fe2(SO4)3 which when heated to about 750K or so gives FeO2 and SO3 iron oxide and sulfur trioxide.