JPH0622749B2 - Molten metal injection nozzle with reticulated pores for gas injection - Google Patents
Molten metal injection nozzle with reticulated pores for gas injectionInfo
- Publication number
- JPH0622749B2 JPH0622749B2 JP4495386A JP4495386A JPH0622749B2 JP H0622749 B2 JPH0622749 B2 JP H0622749B2 JP 4495386 A JP4495386 A JP 4495386A JP 4495386 A JP4495386 A JP 4495386A JP H0622749 B2 JPH0622749 B2 JP H0622749B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- gas
- pores
- injection nozzle
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 title claims description 29
- 239000011148 porous material Substances 0.000 title claims description 27
- 238000002347 injection Methods 0.000 title description 21
- 239000007924 injection Substances 0.000 title description 21
- 238000007664 blowing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 24
- 238000005266 casting Methods 0.000 description 9
- 239000011368 organic material Substances 0.000 description 6
- 238000007654 immersion Methods 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、非金属介在物に起因する閉塞を防ぐためのガ
ス吹き込み構造を有する鋳造用浸漬ノズル、ロングノズ
ル等の溶融金属注入用ノズルに関する。Description: TECHNICAL FIELD The present invention relates to a molten metal injection nozzle such as a casting immersion nozzle and a long nozzle having a gas blowing structure for preventing clogging caused by non-metallic inclusions. .
鋼等の溶融金属の連続鋳造において使用される溶融金属
注入用ノズルは、ノズル注出孔壁にアルミナ等の非金属
介在物が付着し易く、閉塞しがちなものであった。そこ
で、この閉塞を防止するため、鋳造用ノズルの筒部を介
して不活性ガス等を溶融金属に吹き込みながら鋳造を行
う鋳造用ノズルが多用されるようになった。The molten metal injection nozzle used in continuous casting of molten metal such as steel is apt to be clogged because non-metallic inclusions such as alumina are easily attached to the wall of the nozzle outlet hole. Therefore, in order to prevent this blockage, casting nozzles that perform casting while injecting an inert gas or the like into the molten metal through the tubular portion of the casting nozzle have been widely used.
このガス吹込み構造を有する鋳造用ノズルの一例とし
て、特開昭56-102357 号公報に記載された浸漬ノズルが
ある。この浸漬ノズルは、ノズル本体の軸線方向に環状
断面をもつガス吹込用中空室が形成されており、この中
空室から不活性ガス等を浸漬ノズルの注出孔内を流れる
溶湯中に吹き込む構成である。この浸漬ノズルにおいて
は、中空室から吹き込まれたガスが浸漬ノズルの内壁に
ガスフィルムを作ることによって、浸漬ノズルの内壁に
アルミナ等の非金属介在物が付着することを防止する。As an example of the casting nozzle having this gas blowing structure, there is a dipping nozzle described in JP-A-56-102357. This submerged nozzle is formed with a gas injection hollow chamber having an annular cross section in the axial direction of the nozzle main body, and an inert gas or the like is blown into the molten metal flowing in the pouring hole of the submerged nozzle from this hollow chamber. is there. In this immersion nozzle, the gas blown from the hollow chamber forms a gas film on the inner wall of the immersion nozzle, thereby preventing non-metallic inclusions such as alumina from adhering to the inner wall of the immersion nozzle.
このガス吹込型鋳造用ノズルにおいて、不活性ガスは中
空室からノズル材料の気孔を経て注出孔内に吹き込まれ
る。そこで、非金属介在物の付着が激しい吐出口に非金
属介在物が付着することを防止するためには、吐出口周
辺にまで中空室を設けることが必要とされる。In this gas-blowing casting nozzle, the inert gas is blown into the pouring hole from the hollow chamber through the pores of the nozzle material. Therefore, in order to prevent non-metallic inclusions from adhering to the ejection port where non-metallic inclusions are strongly attached, it is necessary to provide a hollow chamber even around the ejection port.
しかし、溶融金属注入用ノズルを実際に製作するにあた
って、このように中空室を配置することは困難であっ
た。また、当該部位は溶融金属による熱的影響を強く受
ける個所であるため、気孔の大きさが変化し易く、安定
したガスの噴出が得られない。このように、先のガス吹
込型鋳造用ノズルにおいては、非金属介在物の付着防止
対策が充分なものであるとはいえない。However, it was difficult to arrange the hollow chambers in this way when actually manufacturing the nozzle for injecting molten metal. Further, since the portion is a portion that is strongly affected by the thermal effect of the molten metal, the size of the pores is likely to change, and stable gas ejection cannot be obtained. As described above, it cannot be said that the above-mentioned gas-blowing-type casting nozzle has sufficient measures to prevent non-metallic inclusions from adhering.
そこで、本発明の溶融金属注入用ノズルは、このような
不安定なガス吹込みを解消することを目的として、開発
されたものである。Therefore, the molten metal injection nozzle of the present invention was developed for the purpose of eliminating such unstable gas injection.
本発明の鋳造用ノズルは、ノズル本体の軸線方向に円周
面に沿って部分的に形成された網状細孔を本体内部に設
け、該網状細孔により本体内部に形成されたガス吹き込
み用中空室と本体の溶融金属に浸漬する部位に設けられ
たガス噴出口とを連通させてなることを特徴とする。The casting nozzle of the present invention is provided with a net-like pore partially formed along the circumferential surface in the axial direction of the nozzle body inside the main body, and the gas blowing hollow formed inside the main body by the net-like pore. It is characterized in that the chamber is communicated with a gas ejection port provided in a portion of the main body which is immersed in the molten metal.
本発明においては、網状細孔はノズル本体内部にその軸
線方向に円周面に沿って部分的に形成されているので、
ノズル本体の強度を何等低下させることがない。しか
も、本体内部に設けられたガス吹き込み用中空室とガス
噴出口とを連通するものであるので、網状細孔は泡状の
ガスがノズル内の溶鋼内にスムーズに吹き込まれること
になる。In the present invention, the reticulated pores are partially formed inside the nozzle body along the circumferential surface in the axial direction thereof,
There is no reduction in the strength of the nozzle body. Moreover, since the gas injection hollow chamber provided inside the main body communicates with the gas ejection port, the gas bubbles in the reticulated pores are smoothly blown into the molten steel in the nozzle.
以下、図示に示した実施例により、本発明の特徴を具体
的に説明する。Hereinafter, the features of the present invention will be specifically described with reference to the illustrated embodiments.
第１図は、本実施例における溶融金属注入用ノズルの内
部構造を示す断面図である。FIG. 1 is a cross-sectional view showing the internal structure of the molten metal injection nozzle in this embodiment.
該溶融金属注入用ノズルは、注出孔Ａを画成する内壁部
材１及びノズル本体の外表面を形成する外壁部材２から
なる二重構造をもっている。この内壁部材１と外壁部材
２との間には、中空室３が設けられている。そして、外
壁部材２にはガス吹き込みのために前記中空室３につな
がる孔部が設けられており、この孔部にガス吹き込み用
ソケット４が埋め込まれている。The molten metal injection nozzle has a double structure including an inner wall member 1 defining a pouring hole A and an outer wall member 2 forming an outer surface of the nozzle body. A hollow chamber 3 is provided between the inner wall member 1 and the outer wall member 2. Further, the outer wall member 2 is provided with a hole portion connected to the hollow chamber 3 for gas injection, and the gas injection socket 4 is embedded in the hole portion.
このような溶融金属注入用ノズルにおいて、ノズル本体
下部に吐出孔５が設けられており、注出孔Ａに流入した
溶融金属がこの吐出孔５を介して溶融金属注入用ノズル
外部に放出され、連続鋳造等の用に供される。このと
き、中空室３と吐出孔５の間は網状細孔６で連絡されて
いる。本例における該網状細孔６は、吐出孔５の内壁に
開口されており、また吐出孔５周辺の注出孔Ａ内壁にも
開口されている。In such a molten metal injecting nozzle, a discharge hole 5 is provided in the lower portion of the nozzle body, and the molten metal flowing into the pouring hole A is discharged to the outside of the molten metal injecting nozzle through the discharge hole 5. It is used for continuous casting. At this time, the hollow chamber 3 and the discharge hole 5 are communicated with each other by the mesh-like pores 6. The reticulated pores 6 in this example are opened on the inner wall of the discharge hole 5 and also on the inner wall of the spout hole A around the discharge hole 5.
この網状細孔６の分布を表したものが、第２図である。
本例では、溶融金属注入用ノズルの周方向対称位置にあ
る二個所に網状細孔６を設けている。すなわち、該網状
細孔６の開口個所は、溶融金属注入用ノズル内外表面の
全域にわたらず、非金属介在物の付着が激しい個所の
み、たとえば吐出孔５及びその周辺，ノズルの内部底壁
或いはノズルの外表面等に特定することができる。FIG. 2 shows the distribution of the network pores 6.
In this example, the reticulated pores 6 are provided at two locations at the circumferentially symmetrical positions of the molten metal injection nozzle. That is, the openings of the mesh-like pores 6 do not extend over the entire inner and outer surfaces of the molten metal injection nozzle, and only the locations where non-metallic inclusions are strongly attached, such as the discharge hole 5 and its periphery, the inner bottom wall of the nozzle, It can be specified on the outer surface of the nozzle or the like.
このため、ガスが最短距離で必要部位に供給されること
になり、レンガの気孔を通じてガスが逸散することに起
因した開口部に至るまでのガスの圧力低下を防止するこ
とができる。また、このような網状細孔６の配置は、溶
融金属注入用ノズル自体に強度の低下をもたらすことな
く、しかも比較的少量のガス吹込みにより効果的に非金
属介在物の付着を防止することを可能にする。For this reason, the gas is supplied to the necessary portion at the shortest distance, and it is possible to prevent the pressure drop of the gas to reach the opening due to the gas escaping through the pores of the brick. Further, such arrangement of the mesh-like pores 6 does not bring about a decrease in strength of the molten metal injection nozzle itself, and effectively prevents non-metallic inclusions from adhering by blowing a relatively small amount of gas. To enable.
なお、第１図における符番７は、スラグレベルSLに相当
する位置で溶融金属注入用ノズルの外壁部材２に設けら
れた保護層を示す。該保護層７は、スラグによる溶融金
属注入用ノズルの侵食を防ぐ上で効果を発揮するもので
ある。Note that reference numeral 7 in FIG. 1 indicates a protective layer provided on the outer wall member 2 of the molten metal injection nozzle at a position corresponding to the slag level SL. The protective layer 7 is effective in preventing erosion of the molten metal injection nozzle by slag.
このような構造の溶融金属注入用ノズルにガス吹き込み
用ソケット４から吹き込まれたガスは、中空室３を経て
網状細孔６を通り、注出孔Ａ内壁及びその周辺から微細
気泡として溶融金属内に噴出される。このとき、網状細
孔６の開口は、非金属介在物の付着が盛んに行われる個
所に設けられているので、比較的少量のガスにより効率
的に非金属介在物の付着を防止することが可能となる。The gas blown into the molten metal injection nozzle having such a structure from the gas blowing socket 4 passes through the hollow chamber 3 and the mesh-like pores 6, and then flows into the molten metal as fine bubbles from the inner wall of the pouring hole A and its periphery. Erupted into. At this time, since the openings of the reticulated pores 6 are provided at the places where non-metallic inclusions are actively attached, the non-metallic inclusions can be efficiently prevented from adhering by a relatively small amount of gas. It will be possible.
すなわち、この鋳造用ノズルによるとき、必要とする個
所に対しガス吹き込みがきめ細かく且つ均一に行われる
ので、閉塞防止はより効果的，効率的になる。That is, when this casting nozzle is used, the gas is blown finely and uniformly to the required portion, so that the prevention of blockage becomes more effective and efficient.
以上の例で述べた網状細孔６としては、二次元或いは三
次元的に拡がる孔部構造のいれでも良い。このような網
状細孔６は、加熱により炭化，揮発，収縮等の変化を受
ける有機質材料をノズル構成用耐火材原料の成形体に所
定の分布で内蔵させておき、その耐火材原料の還元焼
成，低温熱処理等の加熱時に該有機質材料に炭化，揮
発，収縮等の変化を受けさせることにより、容易に形成
することができる。The reticulated pores 6 described in the above examples may have any pore structure that two-dimensionally or three-dimensionally expands. Such net-like pores 6 have an organic material, which undergoes changes such as carbonization, volatilization, and contraction due to heating, incorporated in the molded product of the refractory material for nozzle construction in a predetermined distribution, and the reduction firing of the refractory material It can be easily formed by subjecting the organic material to changes such as carbonization, volatilization and shrinkage during heating such as low temperature heat treatment.
このとき使用する有機質材料が平面的な網体であれば、
作られた網状細孔６は二次元的な拡がりをもつものとな
る。また、その有機質材料がスポンジ状のものであれ
ば、作られた網状細孔６は三次元的な拡がりをもつもの
となる。この有機質材料としては、たとえば、天然繊
維，有機繊維，ポリエチレン，ＰＶＡ，塩化ビニル等有
機化学物質、フェノール樹脂，フラン樹脂等の線材が使
用される。If the organic material used at this time is a flat net,
The reticulated pores 6 produced have a two-dimensional expansion. If the organic material is a sponge-like material, the created mesh-like pores 6 have a three-dimensional spread. As the organic material, for example, a natural fiber, an organic fiber, an organic chemical substance such as polyethylene, PVA, vinyl chloride, or a wire material such as a phenol resin or a furan resin is used.
以上に説明したように、本発明の溶融金属注入用ノズル
においては、吐出孔の内壁及びその周辺に網状細孔を選
択的に開口させている。したがって、比較的少量のガス
により非金属介在物の付着を効果的に防止することがで
き、また網状細孔内蔵により強度の低下もさけることが
できる。また、この多孔状細孔は、有機質材料の炭化，
揮発，収縮等の結果として形成されたものであるから、
自由度の高い二次元或いは三次元的な構造をもち、優れ
たガス分配性を呈する。その結果、溶融金属注入用ノズ
ルの寿命が延長し、且つ注湯作業を円滑に行うことがで
きる等、多大の効果が奏せられる。As described above, in the molten metal injection nozzle of the present invention, reticulated pores are selectively opened on the inner wall of the discharge hole and its periphery. Therefore, it is possible to effectively prevent the non-metallic inclusions from adhering with a relatively small amount of gas, and it is possible to prevent the strength from being lowered by incorporating the mesh-like pores. In addition, the porous pores are carbonization of the organic material,
Since it is formed as a result of volatilization, shrinkage, etc.,
It has a highly flexible two-dimensional or three-dimensional structure and exhibits excellent gas distribution. As a result, the life of the nozzle for injecting the molten metal is extended, and the pouring work can be smoothly performed, which is very effective.
第１図は本発明実施例の溶融金属注入用ノズルを示し、
第２図は該溶融金属注入用ノズルにおける網状細孔の分
布を表したものである。FIG. 1 shows a molten metal injection nozzle according to an embodiment of the present invention,
FIG. 2 shows the distribution of reticulated pores in the molten metal injection nozzle.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−23332（ＪＰ，Ａ) 特開 昭56−102357（ＪＰ，Ａ) 特開 昭58−93545（ＪＰ，Ａ) 特公 昭57−20057（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-50-23332 (JP, A) JP-A-56-102357 (JP, A) JP-A-58-93545 (JP, A) JP-B 57- 20057 (JP, B2)
Claims (1)
分的に形成された網状細孔を本体内部に設け、該網状細
孔により本体内部に形成されたガス吹き込み用中空室と
本体の溶融金属に浸漬する部位に設けられたガス噴出口
とを連通させてなることを特徴とする溶融金属注入用ノ
ズル。1. A gas-blowing hollow chamber and a main body which are provided inside the main body with reticulated pores partially formed along the circumferential surface in the axial direction of the nozzle main body, and which are formed inside the main body by the reticulated pores. 2. A nozzle for injecting a molten metal, characterized in that the nozzle for injecting the molten metal is in communication with a gas ejection port provided in a portion immersed in the molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4495386A JPH0622749B2 (en) | 1986-02-28 | 1986-02-28 | Molten metal injection nozzle with reticulated pores for gas injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4495386A JPH0622749B2 (en) | 1986-02-28 | 1986-02-28 | Molten metal injection nozzle with reticulated pores for gas injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62203663A JPS62203663A (en) | 1987-09-08 |
| JPH0622749B2 true JPH0622749B2 (en) | 1994-03-30 |
Family
ID=12705849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4495386A Expired - Lifetime JPH0622749B2 (en) | 1986-02-28 | 1986-02-28 | Molten metal injection nozzle with reticulated pores for gas injection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622749B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659533B2 (en) * | 1987-06-01 | 1994-08-10 | 日本鋼管株式会社 | Immersion nozzle for continuous casting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5720057B2 (en) | 2011-02-23 | 2015-05-20 | 秀司 大林 | Blood collection and cooling system |
-
1986
- 1986-02-28 JP JP4495386A patent/JPH0622749B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5720057B2 (en) | 2011-02-23 | 2015-05-20 | 秀司 大林 | Blood collection and cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62203663A (en) | 1987-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |