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 他

鉄と鋼, 2003, 89(11), 1113-1119

Number of Access:899（2025-09-03 06:07 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/26378

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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
Creator
CreatorName
中里, 英樹 ; ナカザト, ヒデキ ; Nakazato, Hideki
Creator.Alternative
Ono, Hideki
CreatorName
田尻, 浩之 ; タジリ, ヒロユキ ; Tajiri, Hiroyuki
NRID
1000090029348 1000090029348
CreatorName
碓井, 建夫 ; ウスイ, タテオ ; Usui, Tateo
NRID
1000010179773 1000010179773
researchmap permalink
read0013978 read0013978
CreatorName
田中, 敏宏 ; タナカ, トシヒロ ; Tanaka, Toshihiro
CreatorName
丸川, 雄浄 ; マルカワ, カツキヨ ; Marukawa, Katsukiyo
Subject
RH
DH
degassing
secondary refining
reaction area
circulation flow rate
steelmaking
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.
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
Source Title
鉄と鋼
Volume (Issue)
89(11)
Page
1113-1119
Date of Issued
2003
Language
Japanese
Handle URL
https://hdl.handle.net/11094/26378
PISSN
00211575
NCID
AN00151251
Access Rights
open access
CopyRight
©日本鉄鋼協会
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article