JPH0217736Y2 - - Google Patents
Info
- Publication number
- JPH0217736Y2 JPH0217736Y2 JP1985196599U JP19659985U JPH0217736Y2 JP H0217736 Y2 JPH0217736 Y2 JP H0217736Y2 JP 1985196599 U JP1985196599 U JP 1985196599U JP 19659985 U JP19659985 U JP 19659985U JP H0217736 Y2 JPH0217736 Y2 JP H0217736Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten steel
- refractory
- diameter
- casting
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 10
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910000532 Deoxidized steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は連続鋳造の初期とそれ以降でノズル孔
の内径を変化できるようにした注入用ノズルに関
するものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an injection nozzle that allows the inner diameter of the nozzle hole to be changed at the initial stage of continuous casting and thereafter.
（従来の技術）
ストツパー制御方式の連鋳法では、鋳造初期に
は、タンデイツシユから鋳型への溶鋼流量制御は
ノズル径に支配される。これは耐火物への抜熱に
より、溶鋼温度が低下し、ノズル閉塞するのを防
ぐためにストツパーを全開して注入することによ
る。よつてノズル径はある程度小さくせざるを得
ない。その為、溶鋼の脱酸にAIを使用した場合、
ノズル内面にAI2O3が堆積してノズル閉塞を起す
ことがあり長時間の鋳造は困難である。このよう
な、AI2O3起因のノズル閉塞を防止するためには
溶鋼中にCaを添加し、AI2O3との化合物をつくる
ことによつてAI2O3を低融点化し、ノズル内面へ
の付着、堆積を防止していた。又、ノズルを加熱
して付着を防止するものやノズル内面から不活性
ガスを吹込む方法も行なわれている。(Prior Art) In the stopper control type continuous casting method, in the initial stage of casting, the control of the flow rate of molten steel from the tundish to the mold is controlled by the nozzle diameter. This is because the stopper is fully opened to prevent the molten steel from clogging due to the temperature of the molten steel dropping due to heat removal from the refractories. Therefore, the nozzle diameter has to be reduced to some extent. Therefore, when using AI to deoxidize molten steel,
AI 2 O 3 may accumulate on the inner surface of the nozzle and cause nozzle blockage, making long-term casting difficult. In order to prevent such nozzle clogging caused by AI 2 O 3 , Ca is added to molten steel to create a compound with AI 2 O 3 , which lowers the melting point of AI 2 O 3 and prevents it from forming inside the nozzle. This prevents adhesion and accumulation. There are also methods in which the nozzle is heated to prevent adhesion, and methods in which inert gas is blown from the inside of the nozzle.
その他本考案と関わるものと思われる技術に実
開昭57−86063号に示されるものがある。該技術
は、耐溶損性の小さな耐火物を内面に埋め込み耐
溶損性の大きな耐火物をその外面に形成するもの
である。 Other techniques that are believed to be related to the present invention are those shown in Japanese Utility Model Application Publication No. 86063/1983. This technique involves embedding a refractory with low erosion resistance on the inner surface and forming a refractory with high erosion resistance on the outer surface.
（考案が解決しようとする問題点）
しかしながら前記Ca添加による方法は、Ca添
加量を極めて微妙にコントロールする必要があ
り、また鋼種によつてはCaを添加できない場合
もある。このようにCa添加によるノズルの閉塞
防止には限界があり、適当な方法とは言えない。(Problems to be Solved by the Invention) However, in the method of adding Ca, it is necessary to control the amount of Ca added very delicately, and depending on the type of steel, it may not be possible to add Ca. As described above, there are limits to the prevention of nozzle clogging by adding Ca, and it cannot be said to be an appropriate method.
ノズルを加熱する方法は、耐溶損性に問題を残
し、不活性ガスを吹込む方法は鋳片にピンホール
を残す結果を招き好ましくない。更に、前記実開
昭57−86063号に示されるものは、耐溶損性の大
きな耐火物、小さな耐火物の成分について、具体
的な開示が不十分であり、溶鋼温度と耐火物の融
点との関係についての記載はない。 The method of heating the nozzle leaves a problem in corrosion resistance, and the method of blowing inert gas is undesirable because it leaves pinholes in the slab. Furthermore, the above-mentioned Utility Model Application Publication No. 57-86063 does not provide sufficient concrete disclosure regarding the components of refractories with high and low erosion resistance, and the relationship between molten steel temperature and melting point of refractories is insufficient. There is no mention of the relationship.
（問題点を解決するための手段）
本考案は、前記の状況に鑑みてなされたもの
で、鋳造の初期と中期以降でノズル内径を変化さ
せる事とし、その為に、融点の異なる適当な材質
の耐火物をノズル内面とその外側に分けて形成す
るものである。(Means for solving the problem) The present invention was developed in view of the above-mentioned situation, and the nozzle inner diameter is changed between the early and middle stages of casting. The refractory is formed separately on the inner surface of the nozzle and the outer surface thereof.
即ち、ノズル本体を溶鋼によつて容易に溶損さ
れない耐火物により定常孔径のノズル孔を有する
ように形成し、当該ノズル孔内面に溶鋼により容
易に溶損され得るNa2O・2CaO・3SiO2または
K2O・3CaO・6SiO2からなる内面耐火物をライ
ニングして鋳造初期に縮小された孔径を有するよ
うに形成したことを特徴とする内径可変型連続鋳
造用ノズルであり、第１図に示すように、ノズル
内面に溶鋼よりも低融点の内面耐火物１をライニ
ングし、ノズル本体２は溶鋼よりも融点の高い材
質とする。内面耐火物１の材質としては、
Na2O・2CaO・3SiO2またはK2O・3CaO・6SiO2
とし融点を1300℃程度に調整する。ノズル本体２
の材質はジルコニア、アルミナ等の溶鋼よりも融
点の高いものとする。 That is, the nozzle body is formed with a nozzle hole of a constant diameter using a refractory that is not easily eroded and damaged by molten steel, and the inner surface of the nozzle hole contains Na 2 O, 2CaO, 3SiO 2 that can be easily eroded and damaged by molten steel. or
This is a variable inner diameter continuous casting nozzle, characterized in that it is lined with an inner refractory made of K 2 O. As such, the inner surface of the nozzle is lined with an inner refractory 1 having a melting point lower than that of molten steel, and the nozzle body 2 is made of a material having a melting point higher than that of molten steel. The material of the inner refractory 1 is as follows:
Na 2 O・2CaO・3SiO 2 or K 2 O・3CaO・6SiO 2
and adjust the melting point to about 1300℃. Nozzle body 2
The material should be one with a higher melting point than molten steel, such as zirconia or alumina.
又内面耐火物１のライニング厚みｔは、鋳造時
の溶鋼量、鋳造時間などにより適宜設定するもの
とするが、おおよそ第１図に示すノズル本体２の
内径Ｄの1/3〜1/8が良い。 The lining thickness t of the inner refractory 1 shall be set appropriately depending on the amount of molten steel during casting, casting time, etc., but it should be approximately 1/3 to 1/8 of the inner diameter D of the nozzle body 2 shown in good.
（作用）
本考案はこのように構成してあるので以下に示
す作用をもたらす。溶鋼の注入初期においては、
内面耐火物１によつて形成された内径のノズルと
して、即ちストツパー全開でも流量制御可能な、
比較的小径のノズルとして働く。(Function) Since the present invention is configured as described above, it brings about the following effects. At the beginning of molten steel injection,
As a nozzle with an inner diameter formed by the inner refractory 1, the flow rate can be controlled even when the stopper is fully opened.
Works as a relatively small diameter nozzle.
溶鋼注入の中期、後期においては、融点の低い
内面耐火物１が溶解し、ノズル径はノズル本体２
に定常孔径のノズル孔として設けられた大きさの
内径となり、AI脱酸の場合のAI2O3の付着があつ
ても閉塞に至ることは少ない。尚この時点では、
ストツパーやノズル耐火物は十分加熱されている
のでストツパー全開として作業する必要はなく、
ストツパー上下動により溶鋼流量を制御するので
ノズル径が大でも流量制御は可能である。 In the middle and later stages of molten steel injection, the inner refractory 1 with a low melting point melts, and the nozzle diameter changes to the nozzle body 2.
The inner diameter is the same size as the nozzle hole with a constant diameter, and even if AI 2 O 3 adheres in the case of AI deoxidation, clogging is unlikely to occur. At this point,
The stopper and nozzle refractory are sufficiently heated, so there is no need to work with the stopper fully open.
Since the flow rate of molten steel is controlled by vertical movement of the stopper, flow rate control is possible even with a large nozzle diameter.
（考案の効果）
以上説明したように、本考案によれば、ストツ
パー制御方式によるAI脱酸鋼の鋳造時、AI2O3起
因によるノズル閉塞を防止でき、安定な鋳造作業
を行ない得るものである。(Effects of the invention) As explained above, according to the invention, when casting AI deoxidized steel using the stopper control method, nozzle clogging due to AI 2 O 3 can be prevented and stable casting work can be performed. be.
第１図は本考案のノズルの断面図である。 １：内面耐火物、２：ノズル本体。 FIG. 1 is a sectional view of the nozzle of the present invention. 1: Inner refractory, 2: Nozzle body.
Claims (1)
耐火物により定常孔径のノズル孔を有するように
形成し、当該ノズル孔内面に溶鋼により容易に溶
損され得るNa2O・2CaO・3SiO2またはK2O・
3CaO・6SiO2からなる内面耐火物をライニング
して鋳造初期に縮小された孔径を有するように形
成したことを特徴とする内径可変型連続鋳造用ノ
ズル。 The nozzle body is formed with a nozzle hole of a constant diameter using a refractory that is not easily eroded by molten steel, and the inner surface of the nozzle hole contains Na 2 O, 2CaO, 3SiO 2 or K, which can be easily eroded by molten steel. 2 O・
1. A variable inner diameter continuous casting nozzle characterized by being lined with an inner refractory made of 3CaO and 6SiO 2 and formed to have a reduced hole diameter at the initial stage of casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196599U JPH0217736Y2 (en) | 1985-12-23 | 1985-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196599U JPH0217736Y2 (en) | 1985-12-23 | 1985-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62105752U JPS62105752U (en) | 1987-07-06 |
| JPH0217736Y2 true JPH0217736Y2 (en) | 1990-05-17 |
Family
ID=31155569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985196599U Expired JPH0217736Y2 (en) | 1985-12-23 | 1985-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0217736Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518896Y2 (en) * | 1972-12-21 | 1976-03-09 | ||
| JPS595489Y2 (en) * | 1980-11-12 | 1984-02-18 | 川崎製鉄株式会社 | Nozzle for molten metal injection |
-
1985
- 1985-12-23 JP JP1985196599U patent/JPH0217736Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62105752U (en) | 1987-07-06 |
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