[singhblom]

At least for the steel industry stuff quoted in OP the electricity consumption is mostly to produce hydrogen gas. The gas will then be stored in giant underground chambers and after that used in the steel production. This works extremely nicely with wind power since the electrolysis decouples the electricity consumption from the steel production. This means that the steel plants will act as stabilizers and modulators of the electricity prices in the whole region to a certain extent (together with the hydro plants and batteries presumably).