Title:
PROCESS FOR REMOVAL OF COPPER CONTAINED IN STEEL SCRAPS
Document Type and Number:
WIPO Patent Application WO/2009/110627
Kind Code:
A1
Abstract:
In producing high-grade steel by using copper-containing steel scraps as the iron source, the copper contained in the scraps can be efficiently removed without large facilities by subjecting the copper-containing steel scraps to carburization melting to form a hot metal for steelmaking, removing the copper contained in the hot metal by the use of a sulfur-containing flux, and then removing the sulfur contained in the resulting hot metal. It is preferable that an Na2S-base flux be used as the sulfur-containing flux, that the removal of the copper contained in the hot metal be carried out either in mechanical stirring type refining equipment or by a flux injection method, or that a hot metal having a relatively high sulfur content be produced by using a shaft furnace provided with a carbonaceous material bed therein and then subjected to the above copper removal treatment.
Inventors:
MATSUI, Akitoshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
松井章敏 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
UCHIDA, Yuichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
内田祐一 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
松井章敏 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
UCHIDA, Yuichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
内田祐一 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
Application Number:
JP2009/054370
Publication Date:
September 11, 2009
Filing Date:
March 03, 2009
Export Citation:
Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 10000, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 10000, JP)
MATSUI, Akitoshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
松井章敏 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
UCHIDA, Yuichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 10000, JP)
MATSUI, Akitoshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
松井章敏 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 10000, JP)
UCHIDA, Yuichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 10000, JP)
International Classes:
C21C1/04; C21C1/02; C22B7/00; C22B9/10; F27B1/00
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE TECHNO-RESEARCH CORPORATION 7th Floor Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 10300, JP)
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