RH、DHの大型化に伴う脱ガス反応の促進効果

中里, 英樹; ナカザト, ヒデキ; Ono-Nakazato, Hideki; 田尻, 浩之; タジリ, ヒロユキ; Tajiri, Hiroyuki; 碓井, 建夫; ウスイ, タテオ; Usui, Tateo; 田中, 敏宏; タナカ, トシヒロ; Tanaka, Toshihiro; 丸川, 雄浄; マルカワ, カツキヨ; Marukawa, Katsukiyo

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論文情報

タイトル	RH、DHの大型化に伴う脱ガス反応の促進効果
	Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors
	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	著者名中里, 英樹ナカザト, ヒデキ Ono-Nakazato, Hideki
	著者名田尻, 浩之タジリ, ヒロユキ Tajiri, Hiroyuki
	NRID 1000090029348 1000090029348 著者名碓井, 建夫ウスイ, タテオ Usui, Tateo
	NRID 1000010179773 1000010179773 著者名田中, 敏宏タナカ, トシヒロ Tanaka, Toshihiro
	著者名丸川, 雄浄マルカワ, カツキヨ Marukawa, Katsukiyo
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.
出版者	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
収録物名	鉄と鋼
巻	89
号	11
開始ページ	1113
終了ページ	1119
刊行年月	2003
言語	日本語
ハンドルURL	https://hdl.handle.net/11094/26378
ISSN	00211575
NCID	AN00151251
アクセス権	open access
権利情報	©日本鉄鋼協会
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

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
	Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors
	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
DC.creator	中里, 英樹
	ナカザト, ヒデキ
	Ono-Nakazato, Hideki
	田尻, 浩之
	タジリ, ヒロユキ
	Tajiri, Hiroyuki
	碓井, 建夫
	ウスイ, タテオ
	Usui, Tateo
	田中, 敏宏
	タナカ, トシヒロ
	Tanaka, Toshihiro
	丸川, 雄浄
	マルカワ, カツキヨ
	Marukawa, Katsukiyo
DC.publisher	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
DC.language' scheme='DCTERMS.RFC1766	日本語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2003
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
DC.format	application/pdf
citation_title	RH、DHの大型化に伴う脱ガス反応の促進効果
	Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors
	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
citation_author	中里, 英樹
	ナカザト, ヒデキ
	Ono-Nakazato, Hideki
	田尻, 浩之
	タジリ, ヒロユキ
	Tajiri, Hiroyuki
	碓井, 建夫
	ウスイ, タテオ
	Usui, Tateo
	田中, 敏宏
	タナカ, トシヒロ
	Tanaka, Toshihiro
	丸川, 雄浄
	マルカワ, カツキヨ
	Marukawa, Katsukiyo
citation_publisher	日本鉄鋼協会
	The Iron and Steel Institute of Japan
	ニホン　テッコウ　キョウカイ
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	https://hdl.handle.net/11094/26378

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