REFINING METHOD

To provide a refining method for preventing the lowering of a yield of hot metal in a refining process including intermediate slag discharging in a converter-type refining furnace.SOLUTION: A refining method for desiliconizing and dephosphorizing hot metal 2 in a converter-type refining furnace 1, includes a charging process for charging at least hot metal 2 into the converter-type refining furnace 1, a desiliconizing process for desiliconizing the hot metal by feeding oxygen to the hot metal, a slag discharging process for tilting the converter-type refining furnace 1 to discharge slag 4 after the desiliconizing process, and a dephosphorizing process for dephosphorizing the hot metal 2 by feeding oxygen to the hot metal after the slag discharging process. In the charging process, when an internal volume of the converter-type refining furnace 1 is V(m3), an amount of raw pig iron M(t) charged into the converter-type refining furnace 1 satisfies formula (1). V/M≥0.55...(1)SELECTED DRAWING: Figure 1 【課題】転炉型精錬炉において中間排滓を伴う精錬処理において、溶銑の歩留の低下を防ぐことができる、精錬方法を提供すること。【解決手段】転炉型精錬炉１にて、溶銑２に脱珪処理及び脱リン処理を行う精錬方法において、転炉型精錬炉１に少なくとも溶銑２を装入する装入工程と、溶銑へ送酸することで脱珪処理を行う脱珪工程と、脱珪工程の後、転炉型精錬炉１を傾動させてスラグ４を排出する排滓工程と、排滓工程の後、溶銑２へ送酸することで脱リン処理を行う脱リン工程と、を備え、装入工程では、転炉型精錬炉１の転炉内容積をＶ（ｍ３）としたときに、転炉型精錬炉１への原料銑鉄装入量Ｍ（ｔ）を、（１）式を満足する量とする、精錬方法。Ｖ／Ｍ≧０．５５・・・（１）【選択図】図１