2021 Nashville AISTech

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Dynamic EAF Energy and Material Balance Model for On-Line Process Optimization (Room 204)

A comprehensive and dynamic model has been developed for predicting key melting parameters. The model predicts temperature, carbon, oxygen, slag composition and offgas composition during the melting process. The temperature module is based on energies from electricity and chemical reactions. The carbon and oxygen module is based on scrap chemistry and supplied carbon and oxygen. The slag module is based on flux additions and oxidation reactions. From an established oxidation reaction hierarchy, the offgas module computes the volumes of CO and CO2. This paper discusses the implementation of the model for on-line process control and optimization at SSAB Americas.