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. 2023 Feb 27;123(5):2436–2608. doi: 10.1021/acs.chemrev.2c00799

Table 22. Opportunities of Research Tasks Related to the Use of Steel Scrap as Feedstock for Sustainable Secondary Synthesis (Green Steel Making).

Higher fraction of cooling scrap in converters
Carbon-free inert electrodes for electric arc furnaces
Removal of critical and difficult-to-remove elements that are introduced from mixed vehicle scrap and negatively change the steel quality, particularly causing liquid metal embrittlement (e.g., copper, lead, tin)
Introduction of new sorting methods to ensure that medium-manganese steel scraps are separated from iron-carbon steel scrap
Development of more efficient electric furnace technologies and/or alternative electrical melting techniques for scrap
Part-to-part closed-loop recycling pathways, to guide the flow of valuable alloying elements
Removal of elements that affect phase transformation and hardening such as nickel, chromium and molybdenum from scrap used for carbon steels
Plasma-based removal of tramp elements such as copper, lead and tin
Build-up of closed loop sorting for manganese-containing steels as feedstock platform for the sustainable production of medium-manganese high-performance steels
Steel alloy design for higher impurity tolerance; development of copper-containing steels (e.g., weathering steels, silicon transformer steels, manganese-containing stainless steels and Invar alloys etc.)