丸ビレット連続鋳造用旋回流浸漬ノズル

塚口, 友一; 林, 浩史; 横谷, 真一郎 他

鉄と鋼, 2007, 93(9), 575-582

Number of Access:915（2025-08-13 22:38 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/26367

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Title
丸ビレット連続鋳造用旋回流浸漬ノズル
Swirling Flow Submerged Entry Nozzle for Round Billet Casting
マル　ビレット　レンゾク　チュウゾウヨウ　センカイリュウ　シンセキ　ノズル
Creator
CreatorName
塚口, 友一 ; ツカグチ, ユウイチ ; Tsukaguchi, Yuichi
CreatorName
林, 浩史 ; ハヤシ, ヒロシ ; Hayashi, Hiroshi
NRID
1000080049692 1000080049692
CreatorName
横谷, 真一郎 ; ヨコヤ, シンイチロウ ; Yokoya, Shinichiro
NRID
1000010179773 1000010179773
researchmap permalink
read0013978 read0013978
CreatorName
田中, 敏宏 ; タナカ, トシヒロ ; Tanaka, Toshihiro
NRID
1000090029116 1000090029116
CreatorName
原, 茂太 ; ハラ, シゲタ ; Hara, Shigeta
Subject
continuous casting
submerged entry nozzle
swirling flow
swirl blade
round billet casting
Abstract
We have proposed a technology of swirling flow formation in submerged entry nozzles as a fundamental and effective measure for controlling flow pattern in continuous casting molds. A joint study started in 1997 between Nippon Institute of Technology, Osaka University, Kyushu Refractories and Sumitomo Metal Industries to develop swirling flow submerged entry nozzles with a swirling blade for steel casting. As a first step, we have developed a swirling flow submerged entry nozzle for round billet casting in Wakayama works. Generally, single port submerged entry nozzles are applied for round billet casting with small section molds. Outlet flow from the single port intrudes deeply in strands, which causes lack of equiaxed crystals at the center part of billets and low temperature of molten steel surface in the mold. Low temperature of molten steel surface in the mold induces solidified deckle and retard melting of mold fluxes. As a countermeasure of these problems, M-EMS (Electromagnetic stirring in mold) is widely applied for round billet casters. The basic effect of the swirling flow in the single port submerged entry nozzle for the round billet casting was evaluated by a wood metal experiment, then we applied the swirling flow submerged entry nozzle for the round billet casting. As a result of steel casting in Wakayama, we confirmed same phenomena as the wood metal experiment as follows; (1) The surface temperature of molten steel in the mold rose in the case that the swirling flow in the nozzle and the M-EMS were combined in the opposite direction of rotations by appropriate balance of intensity. (2) The surface temperature of molten steel in the mold also rose in the case without the M-EMS. (3) The surface temperature of molten steel in the mold was thought to rise as a result of the upward flow formation along the mold wall.
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)
93(9)
Page
575-582
Date of Issued
2007
Language
Japanese
Handle URL
https://hdl.handle.net/11094/26367
PISSN
00211575
NCID
AN00151251
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2355/tetsutohagane.93.575
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