A direct reduction system (whether powered by hydrogen or this electrolysis method) would be upstream of the electric arc furnace, see this graphic: https://ww

A direct reduction system (whether powered by hydrogen or this electrolysis method) would be upstream of the electric arc furnace, see this graphic: https://www.steel.org/steel-technology/steel-production/ https://www.steel.org/steel-technology/steel-production/ It's iron ore -> direct reduction (iron) -> electric arc (steel) with carbon being added to the iron in the furnace. This is a replacement for the older pipeline of iron ore -> blast furnace -> basic oxygen furnace.