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焼結鉱原料としてのLD転炉スラグの有効利用

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.13 (1981) No.4

焼結鉱原料としてのLD 転炉スラグの有効利用 Reuse of LD Converter Slag as Sinter Feed

大島 位至(Takashi Oshima) 夏見 敏彦(Toshihiko Natsumi) 近藤 晴己(Harumi Kondo)

要旨 :

LD 転炉スラグは,P が高いという難点を有しているものの,Fe, Mn, MgO, CaO 等の製鉄 副原料として有効成分を含有している。このため省資源,省エネルギーの見地から,焼結 原料としてのリサイクルを開始した。高リンという問題は,脱リン性能に優れた底吹き (Q-BOP)あるいは上底吹(K-BOP)転炉製鋼法を利用するリサイクルシステムの採用に よりほぼ解消され,現在,リサイクル料は全発生量の25~30%を占めるに至り,省資源お よびコスト面で大きな効果をあげている。 Synopsis :

LD coverter slag contains useful elements for ironmaking such as Fe, Mn, MgO, CaO and so forth in spite of its high P content. Efforts were made therefore to reuse LD converter slag as raw material to the sintering process. The problem of high P content was solved by a special reuse system based on high dephosphorization efficiency in Q-BOP and K-BOP steelmaking converters. The reused LD coverter slag accounts for 25 to 30% of the total converter slag and contributes to saving of resources and cost. (c)JFE Steel Corporation, 2003

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