• 1rre@discuss.tchncs.de
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    2 days ago

    Coal has a bunch of impurities compared to charcoal I thought?

    And if the repeated melting is done by burning biomass/charcoal or with clean(er) energy then it’s not a huge issue

    • Phineaz@feddit.org
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      5 hours ago

      Still leagues ahead of biomass. Don’t get me wrong, this is an issue that can be solved. Biomass can be converted to biogas which can be purified to produce methane (or you just burn biogas directly) which then in turn can be used for heat (or other purposes) - the problem here is the sheer amount of energy this requires. Yes, significant portions of the steel industry can be “decarbonised” (or at least I think so) but the effort is immense. Doable, necessary, but it will be a huge piece of work.

    • JacobCoffinWrites@slrpnk.net
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      1 day ago

      Electric Arc Furnaces are probably our best bet for that - they’re an established, proven technology and can be swapped over to a green power source without any other changes (assuming the society has the energy capacity). I think I remember reading that a factory somewhere in Europe had already done that but a quick search has failed me.

      • Phineaz@feddit.org
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        5 hours ago

        Certainly, they’re the shit, but the energy capacity you mentioned is a huge issue. As I said in my other comment it should/could/has to be done, but it’s anything but simple.