2021 Nashville AISTech

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Value Creation of Dolime Compared to MgO Alternatives for EAF Application (Room Virtual)

For electric arc furnace application, MgO is key to managing the lifetime of refractories for achieving the highest productivities and controlling the viscosity of the slag to guarantee good slag foaming and proper metallurgical behavior at the same time. This paper investigates the potential added value of different MgO sources (i.e., raw and calcined dolomite, raw and calcined magnesite, and recycled MgO from refractories) according to their dissolution kinetics into the slag. This affects the ability to saturate the steelmaking slag with MgO, which influences the chemical erosion of the refractories and impacts the foaminess and the metallurgical properties of the slag.