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this post was submitted on 04 Nov 2024
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you're probably talking about direct reduced iron and it's really a problem that can be dealt with easily, just chuck a piece of coke when it's molten for the second time in electric arc furnace (and maybe electrodes introduce enough carbon). substituting coke with hydrogen works also on "ingredient step" if you mean by that fuel needed to reduce iron ore to iron
maybe there's a way to make electrowinning iron economical, and it'd be pretty green too, but i don't know if it is workable
e: you can also avoid need for met coal if you use methane or syngas for direct reduced iron process