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Shutting down a blast furnace in such a fashion that it can be restarted at a later point involves removing the liquid and solidified materials in the hearth of the furnace below the tap hole. This part of the furnace is called Sau (=sow) in German, le loup (=wolf) in French or salamander in English. Its liquid part gets tapped using a drill and an oxygen lance. In Ougrée, this was done yesterday. Furnaceman Pierre Machiroux took this video:

And this video of Pierre shows how cooling the furnace shell looked like:

Thanks, Pierre!