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Evaluation of energy and exergy performances in EAF during melting and refining period

Abstract The evaluation of energy consumption is of fundamental interest in the steelmaking process, especially in the industrial context strongly based on electric arc furnace (EAF) technology as in Italy. A correct analysis of energy exploitation is important to allow better control of the melting and refining period, but nowadays is insufficient. A modern and more precise analysis of the steelmaking process needs the evaluation of scrap oxidation, the balance between the exploited electric and the chemical energies and an exergetic analysis which describes the quality of the energy exploitation and which can provide useful information on the environmental impact. This research has been dedicated to structure a tool to describe the system comprising the furnace, the liquid steel and the charged scrap during its evolution when melting and refining. The computational model has been designed and validated on 40 t EAF that belongs to ASO, a steelmaking company in the north of Italy.