Jfe Steel Corporation

Norihiko Suzuki

Naoki Kikuchi

Takeshi Ishii

Yuichi Uchida

Ryo Kawabata

Kazuhito Yamamoto

Manabu Tano

Naotaka Sasaki

Yasushi Ogasawara

Shizuhiko Ikeno

Masanori Nishikori

Yozo Iwaki

Futoshi Ogasawara

Hironori Fukushima

Kotaro Tanaka

Kochiro Ejima

Masaomi Senoo

There is proposed a method for preliminary treatment of molten iron wherein heat source for dissolving scrap is ensured sufficiently to improve iron yield while decreasing phosphorus concentration efficiently by suppressing the amount of flux solvent used in the process of desiliconization, dephosphorization and decarburization. In the method for preliminary treatment of molten iron by conducting desiliconization and dephosphorization of molten iron with a converter type container, molten iron is first charged into the converter type container to conduct desiliconization and then intermediate slag removal is conducted, and subsequently a lime-based flux solvent is added to the container while blowing oxygen to conduct dephosphorization of the molten iron, and thereafter newly untreated molten iron is charged into the container to conduct desiliconization, and subsequently the above treatments are repeatedly conducted with the same container.

Method for preliminary treatment of molten iron

Growing community of inventors

Fukuyama, Japan

Norihiko Suzuki