RH、DHの大型化に伴う脱ガス反応の促進効果

中里, 英樹; 田尻, 浩之; 碓井, 建夫; 田中, 敏宏; 丸川, 雄浄

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タイトル	RH、DHの大型化に伴う脱ガス反応の促進効果
別タイトル	Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors
タイトル (ヨミ)	RH　DH　ノ　オオガタカ　ニ　トモナウ　ダス　ガス　ハンノウ　ノ　ソクシン　コウカ
著者	中里, 英樹中里, 英樹
	田尻, 浩之田尻, 浩之
	碓井, 建夫碓井, 建夫
	田中, 敏宏田中, 敏宏
	丸川, 雄浄丸川, 雄浄
著者の別表記	Ono-Nakazato, Hideki
	Tajiri, Hiroyuki
	Usui, Tateo
	Tanaka, Toshihiro
	Marukawa, Katsukiyo
著者 (ヨミ)	ナカザト, ヒデキ
	タジリ, ヒロユキ
	タナカ, トシヒロ
	マルカワ, カツキヨ
キーワード等	RH
	DH
	degassing
	secondary refining
	reaction area
	circulation flow rate
	steelmaking
抄録	Many techniques have been developed on the vacuum degassing of molten steel. The RH and DH reactors, which are suitable to the high productivity of converter, have occupied the mainstream. The DH process had constantly been installed until the latter half in 1970's, but has not been set up since 1980's. On the other hand, the RH process has continually been installed up to the present. The reason why RH has occupied the mainstream and has been developed further is examined from the viewpoint of the rate enhancement of the degassing reaction by the enlargement of RH and DH reactors. With the enlargement of the RH and DH reactors, the ratio of the upper surface area of steel in vacuum vessel to total reaction area decreases. On the other hand, the surface area of bubbles by Ar injection increases. Accordingly, the contribution of bubbles to the A/V (reaction area/metal volume) value becomes larger than that of the upper surface of steel in vacuum vessel. Although the argon gas can be also injected in the DH process, it is rather difficult to conduct the Ar injection in comparison with the RH process. It is not possible to sufficiently demonstrate the rate enhancement effect of the bubbles on the degassing reaction in DH reactor. Accordingly, from the viewpoint of the A/V value, the enlargement of the reactor is more advantageous to RH reactor. On the other hand, the circulation mass flow rate of steel similarly increases with increasing the heat size in both RH and DH reactors. It can be concluded that, with the enlargement of the RH and DH reactors, the Ar injection plays more important role on the rate enhancement of degassing reaction. In RH reactor, the molten steel is continuously circulated by the Ar injection. On the other hand, in DH reactor, the vacuum vessel repeats the periodic (uncontinuous) up and down. In this respect, the RH process is superior to the DH process. It can be considered that this is one of the reasons why the RH process has been more developed.
公開者	日本鉄鋼協会
公開者の別表記	The Iron and Steel Institute of Japan
公開者 (ヨミ)	ニホン　テッコウ　キョウカイ
掲載誌名	鉄と鋼
巻	89
号	11
開始ページ	1113
終了ページ	1119
刊行年月	2003
ISSN	00211575
NCID	AN00151251
URL	http://hdl.handle.net/11094/26378
権利情報	©日本鉄鋼協会
言語	日本語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	publisher
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	鉄と鋼.89(11) P.1113-P.1119
DC.title	RH、DHの大型化に伴う脱ガス反応の促進効果
DCTERMS.alternative	Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors
DC.creator	中里, 英樹
	田尻, 浩之
	碓井, 建夫
	田中, 敏宏
	丸川, 雄浄
DC.creator	Ono-Nakazato, Hideki
	Tajiri, Hiroyuki
	Usui, Tateo
	Tanaka, Toshihiro
	Marukawa, Katsukiyo
DC.publisher	日本鉄鋼協会
DC.language" scheme="DCTERMS.RFC1766	日本語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2003
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/26378
DC.subject	RH
	DH
	degassing
	secondary refining
	reaction area
	circulation flow rate
	steelmaking
DCTERMS.abstract	Many techniques have been developed on the vacuum degassing of molten steel. The RH and DH reactors, which are suitable to the high productivity of converter, have occupied the mainstream. The DH process had constantly been installed until the latter half in 1970's, but has not been set up since 1980's. On the other hand, the RH process has continually been installed up to the present. The reason why RH has occupied the mainstream and has been developed further is examined from the viewpoint of the rate enhancement of the degassing reaction by the enlargement of RH and DH reactors. With the enlargement of the RH and DH reactors, the ratio of the upper surface area of steel in vacuum vessel to total reaction area decreases. On the other hand, the surface area of bubbles by Ar injection increases. Accordingly, the contribution of bubbles to the A/V (reaction area/metal volume) value becomes larger than that of the upper surface of steel in vacuum vessel. Although the argon gas can be also injected in the DH process, it is rather difficult to conduct the Ar injection in comparison with the RH process. It is not possible to sufficiently demonstrate the rate enhancement effect of the bubbles on the degassing reaction in DH reactor. Accordingly, from the viewpoint of the A/V value, the enlargement of the reactor is more advantageous to RH reactor. On the other hand, the circulation mass flow rate of steel similarly increases with increasing the heat size in both RH and DH reactors. It can be concluded that, with the enlargement of the RH and DH reactors, the Ar injection plays more important role on the rate enhancement of degassing reaction. In RH reactor, the molten steel is continuously circulated by the Ar injection. On the other hand, in DH reactor, the vacuum vessel repeats the periodic (uncontinuous) up and down. In this respect, the RH process is superior to the DH process. It can be considered that this is one of the reasons why the RH process has been more developed.
DC.rights	©日本鉄鋼協会
citation_title	RH、DHの大型化に伴う脱ガス反応の促進効果
citation_author	中里, 英樹
	田尻, 浩之
	碓井, 建夫
	田中, 敏宏
	丸川, 雄浄
citation_publisher	日本鉄鋼協会
citation_language	日本語
citation_date	2003
citation_journal_title	鉄と鋼
citation_volume	89
citation_issue	11
citation_firstpage	1113
citation_lastpage	1119
citation_issn	00211575
citation_public_url	http://hdl.handle.net/11094/26378
citation_keywords	RH
	DH
	degassing
	secondary refining
	reaction area
	circulation flow rate
	steelmaking

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