Method for preliminary treatment of molten iron

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United States of America Patent

PATENT NO 9920390
SERIAL NO

14371359

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Abstract

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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.

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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ejima, Kochiro Fuuyama, JP 1 1
Fukushima, Hironori Fukuyama, JP 3 113
Ikeno, Shizuhiko Fukuyama, JP 3 1
Ishii, Takeshi Tokyo, JP 100 601
Iwaki, Yozo Fukuyama, JP 2 1
Kawabata, Ryo Tokyo, JP 15 6
Kikuchi, Naoki Fukuyama, JP 120 1454
Nishikori, Masanori Fukuyama, JP 2 1
Ogasawara, Futoshi Chiba, JP 10 3
Ogasawara, Yasushi Chiba, JP 13 24
Sasaki, Naotaka Chiba, JP 26 339
Senoo, Masaomi Fukuyama, JP 1 1
Suzuki, Norihiko Fukuyama, JP 36 442
Tanaka, Kotaro Kawasaki, JP 48 357
Tano, Manabu Fukuyama, JP 5 7
Uchida, Yuichi Chiba, JP 18 98
Yamamoto, Kazuhito Yokohama, JP 46 429

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