Jfe Steel Corporation

Futoshi Ogasawara

Naoki Kikuchi

Takeshi Ishii

Yasuo Kishimoto

Yuichi Uchida

Akitoshi Matsui

Ryo Kawabata

Kazuhito Yamamoto

Naotaka Sasaki

Manabu Tano

Yasushi Ogasawara

Shizuhiko Ikeno

Masanori Nishikori

Yozo Iwaki

Kotaro Tanaka

Norihiko Suzuki

Hironori Fukushima

Masaomi Senoo

Kochiro Ejima

Yasuyoshi Takao

Yudai Hattori

Rei Yokomori

Provided are a scrap determination system and method that can improve scrap determination techniques. A scrap determination system () comprises: a first scrap determination model () generated using teaching data including first learning images, and determines, based on a camera image, grade of scrap in the image and a ratio of the grade; a second scrap determination model () generated using teaching data including second learning images, and determines, based on the image, grade of scrap in the image and a ratio of the grade; a selection model () configured to determine which of the first scrap determination model () and the second scrap determination model () is to be used, based on the image; and an output section () configured to output information of each grade of scrap and a ratio of the grade determined based on the image using the model selected by the selection model ().

Scrap determination system and scrap determination method

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

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Chiba, Japan

Futoshi Ogasawara