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The  aim of the study was to address the challenge – in a particular plant – of the high (FeO) content in slag in Electric Arc furnace (EAF) steelmaking, adopting a high ratio of hot metal to scrap, which uses the operation mode of adding hot metal and smelting simultaneously, the oxygen blowing process was optimised through a combination of industrial practice and theoretical calculation. Specifically, the start time of oxygen blowing was delayed, and the [C] content of the molten steel at the smelting endpoint was increased; furthermore, an oxygen blowing method was performed with a [C] content of 0.6–0.8% for the molten bath during the smelting process. After the oxygen blowing method was optimised, the oxygen consumption per ton of steel decreased by 7.96 Nm 3 , and the (FeO) content of slag decreased by 11.85% on average.

Study on oxygen blowing optimisation of reducing (FeO) content in slag in EAF steelmaking process with high ratio of hot metal to scrap