Thermodynamic and kinetic aspect of solid state reduction of Electric Arc Furnace slag through coke: An experimental study.

Steel slag is one of the major wastes produced during the steelmaking process. In the present scenario, the world’s utilization rate of steel slag is comparatively very low and primarily used for landfills only. The untreated slag used for the dumping will affect the environment adversely and causes loss to the economy as well. In the present study, we are concentrating on steel slag through the latter. The mineralogy of primary slag ensures the presence of various constituent ranges, Fe2O3 /FeO (18–30%), CaO (23–48%), SiO2 (2–6%), MgO (4–17%), and Al2O3 (2–15%), mainly depends on the quality of raw material as well as processing relies on the quality of raw material as well as processing. One of the significant components of steel slag with a large variety of ranges is iron oxides. Iron Oxide is present in the steel slag in the form of FeO, Fe2O3, and FeO.SiO2. This study analyzed the reduction kinetics of steel slag based on the Coats-Redfern method and explained the reduction mechanism of Fayalite for different slag basicity. The investigation involves a temperature range of 960–1478 K with a carbon-to-oxygen ratio of C/O-1.The non-isothermal experiment covers the solid reduction of EAF slag. The TG curve shows the reduction reaction of steel slag and coke from 0.5 to 1.5 is 7.31% to 10.88%. During the investigation, the activation energy of iron reduction process will get decrease with increased slag basicity.