Hi Daniel ! The third seems to me the best solution if there isn't already a tag. This will allow you to add information rather than modify existing ones.
I'd like to point out that there's also another way of tagging steel mills: man_made=works + product=steel wich is way more common (260 times while industrial=steel_mill is used 70 times) Have a nice day ! Romain Le jeu. 25 avr. 2024 à 23:14, Daniel Evans <[email protected]> a écrit : > Hi all, > > In the steel industry, a process which has started gaining adoption in > recent years is the production of steel from Direct Reduced Iron (DRI), > rather than from pig iron produced from iron ore in a blast furnace. > > To give context, the two existing widespread methods of steel production > are: > * Blast Furnace + Basic Oxygen Furnace (BOF), where the blast furnace > produces pig iron from iron ore, and the BOF refines it into steel > * Electric Arc Furnace (EAF), where scrap steel and/or pig iron is refined > into steel > > In contrast to this existing arrangement where the inputs are converted to > steel within a single facility, a number of DRI facilities have been built > independently of existing steel mills (often supplying EAF facilities). The > solid pig iron is then transported to steel mills for further processing, > either within a single company's range of sites, or sold on the open market > to steel producers. > > For the time being, DRI plants remain less common, but most large > steelmakers are investing in the technology for decarbonisation and cost > reasons. > > How should DRI plants be tagged? I can see three options: > > 1. DRI plants receive a separate `industrial=???` tag to differentiate > them from steel mills, because of the technical argument that they do not > produce steel, only pig iron, the precursor to steel. > > 2. DRI plants are tagged as `industrial=steel_mill` with no > differentiation from normal mills, because they're very closely associated > with steelmaking. Additionally, OSM currently has very minimal industrial > tagging (both in terms of the accepted tags, and how many sites are > tagged), and so a special tag for such a small number of sites isn't worth > it yet. > > 3. A new tag such as `steel_mill:process` is introduced to differentiate > between different steel mills, with values along the lines of `integrated` > (blast furnace+BOF), `basic_oxygen`, `electric_arc`, and > `direct_reduction`. It is easy to determine what value is appropriate to a > plant based on aerial photos or public information. > > An example of an independently located DRI plant is Cleveland-Cliff's > Toledo plant: https://www.openstreetmap.org/way/758332131 > And US Steel is reportedly investing in DRI facilities at its iron ore > mines: > https://gmk.center/en/news/us-steel-completes-pilot-project-in-minnesota-to-produce-dr-pellets/ > > Cheers, > Daniel > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > -- Romain
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