OPERATION METHOD OF ELECTRIC FURNACE

To provide an operation method of an electric furnace in which an arc can be efficiently coated.SOLUTION: An operation method of an electric furnace according to one embodiment of the present invention is an operation method of an arc-type electric furnace for smelting molten steel while forming slag on a bath surface. The operation method includes: a slag formation step (step S1) of forming a slag containing CaO, SiO2, MgO, and FeO; and a step (step S2) of charging an additive containing CaO, SiO2, and FeO and a charcoal material near an electrode after the slag formation step (step S1). The basicity of the additive is smaller than that of the slag formed in the slag formation step (step S1).SELECTED DRAWING: Figure 2 【課題】アークを効率的に被覆することができる電気炉の操業方法を提供する。【解決手段】本発明の一実施形態による電気炉の操業方法は、浴面上でスラグをフォーミングさせつつ溶鋼を製錬するアーク式電気炉の操業方法であって、ＣａＯ、ＳｉＯ２、ＭｇＯ、及びＦｅＯを含むスラグを形成するスラグ形成工程（ステップＳ１）と、スラグ形成工程（ステップＳ１）後、電極近傍にＣａＯ、ＳｉＯ２、及びＦｅＯを含む添加剤、並びに炭材を投入する工程（ステップＳ２）と、を備え、前記添加剤の塩基度が、スラグ形成工程（ステップＳ１）で形成されるスラグの塩基度よりも小さい。【選択図】図２