Metinvest, the holding company that owns several plants in southern Ukraine, has
not only the Azovstal and Zaporizhstal plants in its portfolio, but also the smaller
Ilych Iron and Steelworks (also in Mariupol). All three perform air separation
–
the Azovstal and Ilych plants for their basic oxygen furnances (see here and here),
and the Zaporizhstal plant for
a different process (we are not sure what process,
but we know that the plant uses oxygen and argon to purge steel produced
using open
-heart furnances, and that it is a major provider of medical oxygen,
and we deduce that if there is oxygen production there must be air separation).
In English, there is a lot of air separation going on in southern Ukraine