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[Adam Mantine]

I recently read an article in Wikipedia about Basic Oxygen Steelmaking[url] that mentioned quicklime (aka "burnt lime") as being used as flux to make steel. If this use isn't idiosyncratic to the basic oxygen process (I don't know if it is or not) then quicklime should be usable as flux in-game.

[Orange Wizard]

Quicklime is sourced from limestone and calcite anyway though.

[Starver]

I think that the Bessemer Process, and all that it entails, is a little too 'modern' (by half a millenium) for the established dwarven tech-equivalent level that is established.  Although more primitive decarburising seems to be what is already done in dwarven steelmaking.

(That aside, unburnt limestone as the flux, as already added into the current mix as an option, doubtless passes through a 'burnt' stage at some point. It's just that the unwanted combustion products aren't seperated out beforehand. And then the creation of spiritus nitroaereus (or dephlogisticated air) isn't really something we expect the dwarves to do, at least not in vanilla, so I fear we fall short of then bubbling that through the mix for the intended effect, outside canon capabilities.)

Ninjaed.