JPH0740036A - Insert nozzle - Google Patents

Insert nozzle

Info

Publication number
JPH0740036A
JPH0740036A JP15250193A JP15250193A JPH0740036A JP H0740036 A JPH0740036 A JP H0740036A JP 15250193 A JP15250193 A JP 15250193A JP 15250193 A JP15250193 A JP 15250193A JP H0740036 A JPH0740036 A JP H0740036A
Authority
JP
Japan
Prior art keywords
nozzle
nozzle hole
insert
opening edge
tapered angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP15250193A
Other languages
Japanese (ja)
Other versions
JP2781326B2 (en
Inventor
Masaru Terao
尾 勝 寺
Tsunenobu Saeki
伯 恒 信 佐
Michiyuki Irie
江 通 行 入
Shinji Hattori
部 信 次 服
Akira Ote
手 彰 大
Hiroyuki Takeuchi
内 宏 行 竹
Norihisa Sakaguchi
口 典 央 坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinagawa Refractories Co Ltd
Kobe Steel Ltd
Original Assignee
Shinagawa Refractories Co Ltd
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15541848&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH0740036(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Shinagawa Refractories Co Ltd, Kobe Steel Ltd filed Critical Shinagawa Refractories Co Ltd
Priority to JP5152501A priority Critical patent/JP2781326B2/en
Publication of JPH0740036A publication Critical patent/JPH0740036A/en
Application granted granted Critical
Publication of JP2781326B2 publication Critical patent/JP2781326B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

PURPOSE:To improve the natural opening ratio of a nozzle hole at the initial stage by forming an inclined opening edge having larger tapered angle than the tapered angle to the axis of the nozzle hole downward in the inner periphery of the upper opening part of the insert nozzle hole composed of the refractory. CONSTITUTION:The insert nozzle 5 has the nozzle hole 6 at the axis and this nozzle hole 6 is formed as the little contracting tapered state downward having angle alpha to the axis and inclined opening edge 7 having the tapered angle thetaat larger than the tapered angle alpha is formed downward in the inner periphery of the upper opening part of this nozzle 6. By this method, pushing break of a sintered layer by molten steel head is executed on the good condition by forming the larger upper opening area of the nozzle hole 6 forming the sintered layer without reducing the strength of the nozzle. Further, as the nozzle hole 6 itself has small tapered angle, friction with plugging material is low and the natural dropping of the plugging material is not obstructed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は製鋼設備において用いら
れるインサートノズルに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert nozzle used in steelmaking equipment.

【0002】[0002]

【従来の技術】製鋼設備における取鍋用ノズル、なかで
もSN装置のインサートノズル(Subme-rged entry Nozu
l)は、通常アルミナ、ジルコニア等の酸化物と黒鉛とか
らなる耐火物で形成される。
2. Description of the Related Art Ladle nozzles in steelmaking equipment, especially insert nozzles of SN equipment (Subme-rged entry Nozu)
l) is usually formed of a refractory material composed of oxides such as alumina and zirconia and graphite.

【0003】従来のインサートノズルは、図4に縦断面
形状を示すようにインサートノズル1のノズル孔2は上
端の内径Dと下部の内径dとの差が小さく形成されてお
り、これによりノズル孔内への詰物3(砂、珪砂等)と
ノズル孔2の内周面との接触面積および両者間の摩擦が
小さく、かつテーパー角が小さいため詰物の自然落下を
有利にしている。
In the conventional insert nozzle, the nozzle hole 2 of the insert nozzle 1 is formed such that the difference between the inner diameter D at the upper end and the inner diameter d at the lower part is small, as shown in the longitudinal sectional view of FIG. The contact area between the filling 3 (sand, silica sand, etc.) and the inner peripheral surface of the nozzle hole 2 and the friction between them are small, and the taper angle is small, so that the filling can be naturally dropped.

【0004】[0004]

【発明が解決しようとする課題】しかしながら上記従来
のインサートノズルでは、ノズル孔2の上端の開口面積
が小さくなるためノズル孔2の上端で詰物3の上部に形
成される焼結層4(凝固層)を溶鋼ヘッド(圧)により
押し破って流出する際に焼結層4が破れにくく、開口不
良となって溶鋼の流出が良好に行なわれないという問題
があった。
However, in the above-mentioned conventional insert nozzle, since the opening area of the upper end of the nozzle hole 2 becomes small, the sintered layer 4 (solidified layer) formed on the upper part of the filling 3 at the upper end of the nozzle hole 2 is reduced. ) Is crushed by a molten steel head (pressure) and flows out, the sintered layer 4 is hard to be broken, and there is a problem that the molten steel does not flow out satisfactorily due to poor opening.

【0005】さりとてノズル孔2の上端開口部の内径D
を大きくすれば焼結層4の破壊が起きやすくはなるが、
このようにノズルを形成するとノズル1の上方部分の肉
厚が全体的に薄くなって強度劣化を招き、耐久性を失う
とともに、ーパー角が大きくなることから自然落下時の
抵抗が増し、詰物の自然落下に支障をきたすことにな
る。
Inside diameter D of the upper end opening of the nozzle hole 2
If the value is increased, the sintered layer 4 is easily broken, but
When the nozzle is formed in this manner, the wall thickness of the upper portion of the nozzle 1 becomes thin as a whole, resulting in deterioration of strength and loss of durability, and the increase of the oper angle increases the resistance at the time of natural fall, resulting in a filling material. It will hinder the natural fall.

【0006】本発明はこれに鑑み、焼結層の形成される
面積を大きくし、溶鋼ヘッドによる押し破りが確実に達
成されながらノズルの強度劣化を防止し、自然落下を阻
害することのないインサートノズルを提供することを目
的とする。
[0006] In view of this, the present invention is to increase the area where the sintered layer is formed, prevent the deterioration of the strength of the nozzle while surely achieving the breaking by the molten steel head, and do not hinder the natural drop. It is intended to provide a nozzle.

【0007】[0007]

【課題を解決するための手段】上記従来の技術が有する
問題点を解決する手段として、本発明は、耐火物からな
るインサートノズルのノズル孔の上端開口部内周に前記
ノズル孔の軸線に対するテーパー角よりも大きいテーパ
ー角を有する傾斜開口縁を形成したことを特徴とする。
As a means for solving the problems of the above-mentioned prior art, the present invention provides a taper angle with respect to the axis of the nozzle hole at the inner periphery of the upper end opening of the nozzle hole of a refractory insert nozzle. It is characterized in that an inclined opening edge having a larger taper angle is formed.

【0008】[0008]

【作用】インサートノズルの上端で凝固する焼結層は、
ノズル孔の上端の傾斜開口縁の範囲において形成される
ので、焼結層の面積がノズル孔の内径に対して大きく、
そのため溶鋼ヘッドにより容易に押し破られ、詰物と共
に自然落下を促進して流出する。ノズル孔自体は大きい
テーパー角を有しないので詰物の摩擦抵抗を増すことが
なく、自然落下の障害にならない。
[Function] The sintered layer that solidifies at the upper end of the insert nozzle is
Since it is formed in the range of the inclined opening edge of the upper end of the nozzle hole, the area of the sintered layer is larger than the inner diameter of the nozzle hole,
Therefore, it is easily crushed by the molten steel head and promotes spontaneous fall together with the filling to flow out. Since the nozzle hole itself does not have a large taper angle, it does not increase the frictional resistance of the filling and does not hinder the natural fall.

【0009】[0009]

【実施例】以下、本発明を図面に示す実施例を参照して
説明する。本発明によるインサートノズル5は、図1に
縦断面を示すように軸心にノズル孔6を有し、このノズ
ル孔6は軸線に対し角度αを有するようやや下搾りのテ
ーパー状とされ、このノズル孔6の上端開口部の内周に
は前記テーパー角αよりも大きいテーパー角βを有する
傾斜開口縁7が形成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. The insert nozzle 5 according to the present invention has a nozzle hole 6 in the axial center as shown in the vertical cross section in FIG. 1, and the nozzle hole 6 has a slightly squeezed taper shape so as to have an angle α with respect to the axis. An inclined opening edge 7 having a taper angle β larger than the taper angle α is formed on the inner circumference of the upper end opening of the nozzle hole 6.

【0010】上記インサートノズル5の各部の寸法例を
図2(A)〜(D)に4種の実施例を示している。そし
て各実施例におけるノズルの高さHに対する傾斜開口縁
7が形成される高さhの比h/H、および傾斜開口縁7
の内径D1 とノズル孔6の下部の内径d1 との比D1
1 は表1の通りである。
Four dimensions are shown in FIGS. 2 (A) to 2 (D) as examples of the dimensions of each part of the insert nozzle 5. The ratio h / H of the height h at which the inclined opening edge 7 is formed to the height H of the nozzle in each embodiment, and the inclined opening edge 7
Ratio of inner diameter D 1 of the nozzles to inner diameter d 1 of the lower portion of the nozzle hole 6 D 1 /
d 1 is as shown in Table 1.

【0011】[0011]

【表1】 そして上記各実施例(A)〜(D)により各10回ずつ
実際に使用した結果を従来のものとの比較において表2
に示している。
[Table 1] Then, the results obtained by actually using each of the above-mentioned Examples (A) to (D) 10 times are shown in Table 2 in comparison with the conventional one.
Is shown in.

【0012】[0012]

【表2】 上記の結果から明らかなように、従来品(図4の単純な
ノズル孔2を有するもの)では初期開口率が94%止り
であったのに対し実施例(A)〜(D)のいずれも95
%を上まわっており、特に実施例(B)では98%に達
していることが判明している。
[Table 2] As is clear from the above results, in the conventional product (having the simple nozzle hole 2 in FIG. 4), the initial aperture ratio was 94%, but in any of Examples (A) to (D). 95
%, Especially in Example (B), it has been found to reach 98%.

【0013】したがってノズルの強度を減ずることなく
焼結層が形成されるノズル孔6の上端開口面積が大きく
なることから、焼結層の溶鋼ヘッドによる押し破りが良
好になされ、またノズル孔6自体はテーパー角が小さい
故詰物の自然落下を妨げない。
Therefore, since the upper end opening area of the nozzle hole 6 in which the sintered layer is formed is increased without reducing the strength of the nozzle, the sintered layer is satisfactorily crushed by the molten steel head, and the nozzle hole 6 itself. Has a small taper angle and does not prevent the filling material from falling naturally.

【0014】図3は、本発明によるインサートノズル5
の使用形態を例示するもので、取鍋8(またはタンディ
ッシュ)の底部にインサートノズル5が下面側から挿入
され、取鍋8の下面に装着されるスライドバルブ9のボ
トムプレート10の孔11の周囲の凸部にインサートノ
ズル5の下端が嵌合されて支持されている。そして上記
スライドバルブ9の油圧シリンダ12によるスライドプ
レート13のスライドによりその孔14と前記ボトムプ
レート10の孔11との合致、非合致により開閉され
る。
FIG. 3 shows an insert nozzle 5 according to the present invention.
The insert nozzle 5 is inserted into the bottom of the ladle 8 (or tundish) from the lower surface side, and the hole 11 of the bottom plate 10 of the slide valve 9 mounted on the lower surface of the ladle 8 is illustrated. The lower end of the insert nozzle 5 is fitted into and supported by the peripheral projections. When the slide plate 13 is slid by the hydraulic cylinder 12 of the slide valve 9, the hole 14 and the hole 11 of the bottom plate 10 are matched or non-matched to open and close.

【0015】[0015]

【発明の効果】以上説明したように本発明によれば、耐
火物からなるインサートノズルのノズル孔の上端開口部
内周に前記ノズル孔の軸線に対するテーパー角よりも大
きいテーパー角を有する傾斜開口縁を形成したことによ
り、ノズルの肉厚を減ずることなくノズル孔の上端開口
部の開口面積が大きく、ノズル自体の強度を損なわずに
ノズル上端に形成される焼結層の溶鋼ヘッドによる押し
破りが確実にでき、初期自然開口率を大巾に高めること
ができる。またノズル孔自体はテーパー角が小さいの
で、詰物との摩擦が少なく、自然落下を防げることがな
いなどの種々優れた効果がある。
As described above, according to the present invention, an inclined opening edge having a taper angle larger than the taper angle with respect to the axis of the nozzle hole is provided on the inner periphery of the upper end opening of the nozzle hole of the insert nozzle made of refractory. By forming it, the opening area of the upper end opening of the nozzle hole is large without reducing the wall thickness of the nozzle, and the molten steel head is sure to break the sintered layer formed on the upper end of the nozzle without impairing the strength of the nozzle itself. The initial natural aperture ratio can be greatly increased. Further, since the nozzle hole itself has a small taper angle, it has various excellent effects such as less friction with the filling material and preventing spontaneous falling.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明によるインサートノズルの一実施例を示
す縦断面図。
FIG. 1 is a vertical sectional view showing an embodiment of an insert nozzle according to the present invention.

【図2】(A)〜(D)は本発明の具体的寸法を示す実
施例(A)〜(D)の縦断面図。
2A to 2D are vertical cross-sectional views of Examples (A) to (D) showing specific dimensions of the present invention.

【図3】インサートノズルの使用形態例を示す説明図。FIG. 3 is an explanatory view showing an example of how the insert nozzle is used.

【図4】従来のインサートノズルを示す縦断説明図。FIG. 4 is a vertical cross sectional view showing a conventional insert nozzle.

【符号の説明】[Explanation of symbols]

1,5 インサートノズル 2,6 ノズル孔 3 詰物 4 焼結層 7 傾斜開口縁 8 取鍋 9 スライドバルブ 1,5 Insert nozzle 2,6 Nozzle hole 3 Filling 4 Sintered layer 7 Inclined opening edge 8 Ladle 9 Slide valve

───────────────────────────────────────────────────── フロントページの続き (72)発明者 服 部 信 次 兵庫県加古川市平岡町一色西1−65 (72)発明者 大 手 彰 兵庫県加古川市金沢町1番地 株式会社神 戸製鋼所加古川製鉄所内 (72)発明者 竹 内 宏 行 兵庫県加古川市金沢町1番地 株式会社神 戸製鋼所加古川製鉄所内 (72)発明者 坂 口 典 央 兵庫県加古川市金沢町1番地 株式会社神 戸製鋼所加古川製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Hattori 1-65 Isshiki Nishi, Hiraoka-cho, Kakogawa-shi, Hyogo Prefecture (72) Akira Ote 1 Kanazawa-machi, Kakogawa-shi, Hyogo Prefecture Kakogawa Co., Ltd. Inside the Steel Works (72) Hiroyuki Takeuchi, 1st Kanazawa Town, Kakogawa City, Hyogo Prefecture Kamido Steel Works Co., Ltd. Inside the Kakogawa Steel Works (72) Norio Sakaguchi, Kanazawa Town, Kakogawa City, Hyogo Prefecture Kamido Steel Co., Ltd. Tokokagawa Steel Works

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】耐火物からなるインサートノズルのノズル
孔の上端開口部内周に前記ノズル孔の軸線に対するテー
パー角よりも大きいテーパー角を有する傾斜開口縁を形
成したことを特徴とするインサートノズル。
1. An insert nozzle comprising a refractory insert nozzle, wherein an inclined opening edge having a taper angle larger than a taper angle with respect to an axis of the nozzle hole is formed on an inner circumference of an upper end opening of the nozzle hole.
【請求項2】前記傾斜開口縁はノズル全長に対し3.8
〜11.5%の範囲で形成されるとともに傾斜開口縁の
テーパー角が60〜80°の範囲とされ、ノズル孔の下
部内径に対し傾斜開口縁の内径を150〜180%の範
囲とされ、傾斜開口縁の上端肉厚が13mm以上とされて
いる請求項1記載のインサートノズル。
2. The inclined opening edge is 3.8 with respect to the entire nozzle length.
The taper angle of the inclined opening edge is in the range of 60 to 80 °, and the inner diameter of the inclined opening edge is in the range of 150 to 180% with respect to the lower inner diameter of the nozzle hole, The insert nozzle according to claim 1, wherein the upper end wall thickness of the inclined opening edge is 13 mm or more.
JP5152501A 1993-06-23 1993-06-23 Insert nozzle Expired - Fee Related JP2781326B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5152501A JP2781326B2 (en) 1993-06-23 1993-06-23 Insert nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5152501A JP2781326B2 (en) 1993-06-23 1993-06-23 Insert nozzle

Publications (2)

Publication Number Publication Date
JPH0740036A true JPH0740036A (en) 1995-02-10
JP2781326B2 JP2781326B2 (en) 1998-07-30

Family

ID=15541848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5152501A Expired - Fee Related JP2781326B2 (en) 1993-06-23 1993-06-23 Insert nozzle

Country Status (1)

Country Link
JP (1) JP2781326B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103231047A (en) * 2013-05-16 2013-08-07 马钢(集团)控股有限公司 Ladle nozzle capable of improving automatic casting rate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761503A (en) * 1980-09-30 1982-04-14 Matsushita Electric Works Ltd Manufacture of aggregate veneer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761503A (en) * 1980-09-30 1982-04-14 Matsushita Electric Works Ltd Manufacture of aggregate veneer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103231047A (en) * 2013-05-16 2013-08-07 马钢(集团)控股有限公司 Ladle nozzle capable of improving automatic casting rate

Also Published As

Publication number Publication date
JP2781326B2 (en) 1998-07-30

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