[ahartmetz]

I can't find it neither, but "high oven" is properly translated as blast furnace.

[h4ck_th3_pl4n3t]

Maybe OP is talking about this incident? [1]

Couldn't find another one mentioning unplanned shutdown or similar.

[1] https://www.ssab.com/en/news/2018/08/blast-furnace-shutdown-...