producing metal in space

What equipment, materials and amount of electricity are needed to
produce steel (in space) from ores found on NEOs?

Would there be a need to add carbon (as a reducing agent) during the
refining process, or something with characteristics similar to
limestone (I believe calcium oxide is the "active ingredient" in
limestone)? Would oxygen be needed for a blast furnace? Would water
be needed to quench the hot steel?

Another question I have is, How would something like a mini-mill be
modified to function in zero-G and vacuum?

I had thought something like an electric arc furnace would be all
that's needed to refine pure iron/steel from NEO ores, but from what I
can find, EAFs appear to be used almost exclusivly for refining scrap
steel.