Steel plants sometimes have deals to operate at certain times for load shedding anyway, but how about they use the times when we have an excess of solar/wind and its not well suited to steel production (maybe due to shift patterns) to generate onsite Hydrogen using that excess power? Then they have readily available onsite green hydrogen.

I think things like this will become an absolute necessity soon, using green power at its peaks to store resources for use later. (Obviously batteries will also be essential, although I would rather see gravity storage with big reservoirs like they have in Wales)