JPS6376753A - Box type submerged nozzle for high cleanliness steel - Google Patents
Box type submerged nozzle for high cleanliness steelInfo
- Publication number
- JPS6376753A JPS6376753A JP21810086A JP21810086A JPS6376753A JP S6376753 A JPS6376753 A JP S6376753A JP 21810086 A JP21810086 A JP 21810086A JP 21810086 A JP21810086 A JP 21810086A JP S6376753 A JPS6376753 A JP S6376753A
- Authority
- JP
- Japan
- Prior art keywords
- holes
- cylindrical body
- discharge hole
- wall
- cavity
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 230000003749 cleanliness Effects 0.000 title abstract description 4
- 238000007654 immersion Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 11
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 238000005266 casting Methods 0.000 abstract description 11
- 238000009749 continuous casting Methods 0.000 abstract description 7
- 238000007667 floating Methods 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000002195 synergetic effect Effects 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
- 238000005188 flotation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は鋼の連続鋳造に際して、溶鋼をモールド内に注
入する浸漬ノズルに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a submerged nozzle for injecting molten steel into a mold during continuous steel casting.
(従来の技術)
近年?8鋼の鋳造においてはその生産性、鋳造歩留、及
び省エネルギー化等の観点から連続鋳造が広く採用され
ている。この連続鋳造はモールド内に浸漬ノズルを介し
て溶鋼を注入しつつ、モールド及び二次冷却帯によって
冷却凝固させながら連続的に引き抜いて赤熱鋳片を製造
する。(Conventional technology) Recent years? Continuous casting is widely used in casting No. 8 steel from the viewpoints of productivity, casting yield, energy saving, etc. In this continuous casting, molten steel is injected into a mold through a submerged nozzle, and is continuously drawn out while being cooled and solidified by the mold and a secondary cooling zone to produce a red-hot slab.
この状態においては、溶湯が即く凝固して鋳片となるこ
とから溶鋼自体の高清浄化は勿論のこと、浸漬ノズルに
起因した注入流の偏流による凝固の不均一、あるいは介
在物等の浮上阻害、又は差込み等によっても良鋳片の安
定鋳造は行ない難く当該作業従事者にとって重要な解決
技術課題となっている。In this state, the molten metal quickly solidifies into slabs, which not only improves the cleanliness of the molten steel itself, but also prevents uneven solidification due to uneven flow of the injection flow caused by the immersion nozzle, or interference with floating of inclusions. However, it is difficult to stably cast a good slab by casting, inserting, etc., and this is an important technical problem for workers involved in the work.
従って、二九等鋳造時の問題を解決して安定した鋳造を
行なうために例えば実開昭49−139322号公報の
如く、浸漬ノズルの下端両側に排出路を設けるとともに
、排出路の外周に通路を有する密閉状の滞流箱を固設し
、該滞流箱の周壁に複数の放出口を設けた浸漬ノズル(
以下、単に滞流箱ノズルと称する)を用いるか、あるい
は特開昭51−54836号公報に示すように従来の外
周耐火素材の内側にCaO:1.0〜10.0%含有せ
しめた5in2系耐火物を内張すして、ノズル詰りを防
止する浸漬ノズル(以下、単に内張リノズルと称する)
等が提案されている。Therefore, in order to solve the problem during No. 29 casting and perform stable casting, a discharge passage is provided on both sides of the lower end of the immersion nozzle, and a passage is provided on the outer periphery of the discharge passage, as in, for example, Japanese Utility Model Application Publication No. 49-139322. An immersion nozzle (in which a sealed flow box having a
(hereinafter simply referred to as a flow box nozzle), or as shown in JP-A-51-54836, a 5in2 system containing 1.0 to 10.0% CaO inside a conventional outer fireproof material. Immersed nozzle lined with refractory material to prevent nozzle clogging (hereinafter simply referred to as lined nozzle)
etc. have been proposed.
(発明が解決しようとする問題点)
しかしながら、これ等浸漬ノズルを用いても高清浄化及
び安定鋳造化を図るには以下の理由から十分とは言い難
い。まず滞流箱ノズルでは溶湯の吐出流が空隙間を介し
た短絡流となり狙いとする吐出流の緩和が図れない。ま
た吐出流も横方向のみか、あるいは上方流を主流とする
ノズルでは凝固殻の洗い現像による不均一凝固、又は湯
面の擾乱を生じパウダー若しくは介在物等の差込みを招
く。(Problems to be Solved by the Invention) However, even if these immersion nozzles are used, they are not sufficient for achieving high cleanliness and stable casting for the following reasons. First, in the flow box nozzle, the discharge flow of the molten metal becomes a short-circuit flow through the gap, and the aimed discharge flow cannot be relaxed. In addition, in a nozzle in which the discharge flow is mainly lateral or upward flow, uneven solidification due to washing and development of the solidified shell or disturbance of the molten metal surface may occur, leading to the insertion of powder or inclusions.
さらにまた、溶湯の吐出流速の減少を図るために溶湯の
滞流域を単に形成しても、該滞流域にAQ□0.系の付
着を生じ逆にこれらの剥離混入による重大な品質欠陥を
招く。一方、内張リノズルは吐出流の十分な減速緩和が
図れないことに加えて、内面張り耐火物による混入介在
物の捕捉、及び形態改質が十分に行ない得す、逆に凝固
殻の洗い現像による凝固不均一、あるいは吐出流による
・介在物の差込みに伴う鋳造障害や品質阻害を招く等の
欠点を有している。Furthermore, even if a molten metal retention area is simply formed in order to reduce the discharge flow rate of the molten metal, the AQ□0 in the molten metal retention area. Adhesion of the system may occur, and conversely, serious quality defects may occur due to these peelings and contamination. On the other hand, with lined renozzles, in addition to not being able to achieve sufficient deceleration and relaxation of the discharge flow, the inner lined refractory material cannot sufficiently capture inclusions and reform the shape, but conversely, it is difficult to wash and develop solidified shells. It has disadvantages such as non-uniform solidification due to the discharge flow or insertion of inclusions resulting in casting failures and quality problems.
本発明はこれ等従来の浸漬ノズルの欠点である吐出流の
緩和を図り、ig固の均一化、湯面撹乱の防止、及び介
在物の浮上促進と差込みを抑止して良品質鋳片の安定鋳
造を可能にする箱型浸漬ノズルの程供にある。The present invention aims to alleviate the discharge flow, which is a drawback of conventional immersion nozzles, to make the IG hardness uniform, to prevent surface disturbance, and to stabilize high-quality slabs by suppressing the promotion and insertion of inclusions. There is a box type immersion nozzle that enables casting.
(問題点を解決するための手段)
以下、本発明による高清浄鋼用箱型浸漬ノズルについて
述べる。本発明者等は本発明に先たち従来の浸漬ノズル
の問題点の検討と各種の実温実験によって以下の知見を
得た。連続鋳造のおいて良品質の鋳片を安定的に鋳造す
るには、まず、■浸漬ノズルの吐出流速を十分に緩和し
た上昇若しくは下降流とすること。■空隙部の形成によ
って吐出流は衝突による緩衝が最も効果的であり、極端
な滞流域は付着物の析出と剥離による品質阻害を招く。(Means for Solving the Problems) Hereinafter, a box-type immersion nozzle for highly clean steel according to the present invention will be described. Prior to the present invention, the inventors of the present invention obtained the following knowledge by studying the problems of conventional submerged nozzles and conducting various actual temperature experiments. In order to stably cast high-quality slabs in continuous casting, first of all, (1) the discharge flow rate of the immersion nozzle should be set to a sufficiently moderate upward or downward flow. ■By forming voids, the discharge flow is most effectively buffered by collisions, and extreme stagnation areas result in quality problems due to deposition and peeling of deposits.
■一方、滞流域における介在物の捕捉は効果的であり、
且つこの領域を活用した介在物の性状改質も効果的で、
しかもこの改質と緩和された下向流によるゆるやかな上
昇流とによって介在物の浮上作用が促進される。■浮上
介在物の捕捉とモールド潤滑を図るために適宜湯面の攪
拌が必要である等が必須であることを知見し得た。■On the other hand, capturing inclusions in the retention area is effective;
In addition, it is also effective to modify the properties of inclusions by utilizing this region.
Furthermore, this modification and the gentle upward flow caused by the relaxed downward flow promote the floating action of inclusions. (2) It was found that appropriate stirring of the molten metal surface is essential in order to capture floating inclusions and lubricate the mold.
本発明はこれ等の知見を基に成し得たものであり、筒状
体の吐出孔の出側を夫々壁面で囲続し。The present invention was achieved based on these findings, and the outlet sides of the discharge holes of the cylindrical body are each surrounded by a wall surface.
その内、筒状体の吐出孔に平行する壁面は筒状体に接し
て形成する空隙部を設け、しかも空隙部の下方では他の
空隙部と連通し、該空隙部の溶湯滞流域の吐出孔と対面
する側壁に吐出孔を穿設し、且つ底壁には筒状体の軸心
を中心とした下向き吐出孔を設けることにより、又は更
に前記の空隙部の内壁面にCaO含有耐火物板を内張り
を設けることにより、流速を緩和した下向流となして前
記の技術課題を一挙に解決した浸漬ノズルを実現した。Among them, a wall surface parallel to the discharge hole of the cylindrical body has a cavity formed in contact with the cylindrical body, and furthermore, the lower part of the cavity communicates with another cavity, and the molten metal retention area of the cavity is discharged. By providing a discharge hole in the side wall facing the hole and providing a downward discharge hole centered on the axis of the cylindrical body in the bottom wall, or by further providing a CaO-containing refractory on the inner wall surface of the cavity. By providing a plate lining, a downward flow with a moderate flow velocity was created, and a submerged nozzle was realized that solved the above technical problems at once.
(作 用) 以下、図に示す実施態様に基づいてさらに詳述する。(for production) Hereinafter, further detailed description will be given based on the embodiment shown in the figures.
第1図(a)は本発明による連続鋳造用箱型浸漬ノズル
の断面図を示し、第1図(b)はA−A’断面矢視図を
示し、第2図(a)は他の例を示し、第2図(b)はA
−A’断面矢視図を示し、第3図はCaO含有耐火物板
を内張すした際の断面図を示す。FIG. 1(a) shows a cross-sectional view of a box-type immersion nozzle for continuous casting according to the present invention, FIG. 1(b) shows a cross-sectional view taken along the line A-A', and FIG. An example is shown in Figure 2(b).
-A' cross-sectional view is shown, and FIG. 3 is a cross-sectional view when a CaO-containing refractory plate is lined inside.
図において1は例えばアルミナ−C系、5L−C系ある
いはZrO2系等からなる耐火物の筒状体からなり下端
部に適宜下向角度を有する吐出孔2を設けた筒状体であ
る。また、吐出孔2には該吐出孔2を囲続した空隙部3
が壁面体4によって設けである。In the figure, 1 is a cylindrical body made of a refractory made of, for example, alumina-C, 5L-C, or ZrO2, and is provided with a discharge hole 2 having a suitable downward angle at its lower end. In addition, the discharge hole 2 has a cavity 3 surrounding the discharge hole 2.
is provided by the wall body 4.
この壁面体4は耐火物素材からなり上壁4aと側壁4b
、及び底壁4cからなっており、該上壁4aには筒状体
1の下端が嵌挿され、しかもスラグライン部5のテーパ
一部5aにて競り合い係止されている。This wall body 4 is made of a refractory material, and has an upper wall 4a and a side wall 4b.
, and a bottom wall 4c, the lower end of the cylindrical body 1 is fitted into the upper wall 4a, and furthermore, the tapered portion 5a of the slug line portion 5 is engaged and locked.
筒状体はこの状態にて筒状体の吐出孔に平行する側壁4
bに同様に嵌挿され、前記上壁4aと一体に係合して空
隙部3を形成するとともに空隙部3の下部は夫々他の空
隙部と連通して、底u4cには筒状体1の軸心x−x’
を中心とした下向き吐出孔8が穿設されている。なお図
中9は溶鋼流通路である。In this state, the cylindrical body has a side wall 4 parallel to the discharge hole of the cylindrical body.
b in the same manner and engages integrally with the upper wall 4a to form a cavity 3, and the lower part of the cavity 3 communicates with each other cavity, and the bottom u4c has a cylindrical body 1. axis x-x'
A downward discharge hole 8 centered at is bored. Note that 9 in the figure is a molten steel flow path.
また、空隙部3を形成する壁面体4の側壁4bには吐出
孔2と対面する部位で、且つ吐出孔2の上限部位近傍高
さに、側壁の吐出孔7が穿設してあふ
鮫。この側壁の吐出孔7及び第1図(a)に示すように
筒状体1の軸心x−x’ を中心とした下向き吐出孔8
は円形に限らず楕円若しくは矩形であっても良い。なお
第1図(b)に示すように側面吐出孔7は側壁4bの下
端に穿設し、しかも筒状体1の軸心を中心とした下向き
吐出孔8を設けてもよい。In addition, a discharge hole 7 is bored in the side wall 4b of the wall body 4 forming the cavity 3 at a portion facing the discharge hole 2 and at a height near the upper limit portion of the discharge hole 2. The discharge hole 7 in this side wall and the downward discharge hole 8 centered on the axis x-x' of the cylindrical body 1 as shown in FIG. 1(a).
is not limited to a circular shape, but may be an ellipse or a rectangle. Incidentally, as shown in FIG. 1(b), the side discharge hole 7 may be formed at the lower end of the side wall 4b, and a downward discharge hole 8 may be provided centered on the axis of the cylindrical body 1.
このようにして浸漬ノズル1に注湯された溶鋼は吐出孔
2よりかなりの速度で流出するが、側壁4bへの衝突と
空隙部3のi8湯滞流域による緩和との相乗作用によっ
て急激に減速されて下向吐出孔8から注出される。また
、該空隙部3には必ず滞流域が生じこの壁面体4にAl
1,0.系の析出付着物を形成する。この付着物はかな
り生長すると剥雛と差込みにより品質阻害を招くことか
らこの付着防止と混入するAQ20.系析出物の浮上促
進、及びモールド湯面パウダーの溶融調整を一挙に小容
凰の側面吐出孔7の流れによって行なう。第1図のよう
に吐出孔2からの吐出流を側壁4bに衝突せしめ、且つ
底壁4cの案内により、両側面の吐出流を再衝突して中
心下向流とすることにより緩和された吐出流と側面吐出
流との相乗的効果によって介在物の浮上と除去がより効
果的に行なわれる。The molten steel poured into the immersion nozzle 1 in this way flows out from the discharge hole 2 at a considerable speed, but it is rapidly decelerated due to the synergistic effect of collision with the side wall 4b and relaxation by the i8 molten metal retention area in the cavity 3. and is poured out from the downward discharge hole 8. In addition, a retention area is always generated in the cavity 3 and the wall body 4 is covered with Al.
1,0. Forms deposits on the system. If this adhesion grows considerably, it will cause quality problems due to peeling and insertion, so this adhesion prevention and AQ20. The floating of system precipitates is promoted and the mold surface powder is melted and adjusted all at once by the flow through the side discharge holes 7 of the small volume hood. As shown in Fig. 1, the discharge flow from the discharge hole 2 is made to collide with the side wall 4b, and the discharge flow from both sides collides again with the guidance of the bottom wall 4c to form a center downward flow, thereby reducing the discharge. The synergistic effect of the flow and the side discharge flow makes floating and removal of inclusions more effective.
このように減速緩和された下向流は下降して緩和上昇流
となり、これがさらに側面吐出流と相加され、理想的な
浴攪拌と介在物等の浮上及び凝固が図れる。また、この
介在物の浮上と除去をさらに向上せしめるために、第3
図に示すようにこの空隙部3を形成する壁面に例えば第
1表に示す如きCaO含有耐火物板11 a −bをモ
ルタルあるいは焼付は又は一般の手段によって固設する
。このCaO含有耐火物板11a〜bはCaO:50〜
95%含有せしめることが必要があるが、50%より少
ないとll、0゜系介在物の補促と改質効果が図れない
。一方、95%より多いと耐溶損及び強度不足となるこ
とから50〜95%が望ましい。The downward flow thus decelerated and relaxed descends to become a relaxed upward flow, which is further added to the side discharge flow to achieve ideal bath agitation and floating and solidification of inclusions and the like. In addition, in order to further improve the flotation and removal of these inclusions, a third
As shown in the figure, CaO-containing refractory plates 11a-b as shown in Table 1 are fixed to the wall surface forming the cavity 3 by mortar, baking, or other common means. These CaO-containing refractory plates 11a to 11b have a CaO content of 50 to
It is necessary to contain 95%, but if it is less than 50%, the effect of promoting 11,0° inclusions and improving the quality cannot be achieved. On the other hand, if it is more than 95%, the melting resistance and strength will be insufficient, so 50 to 95% is desirable.
このように構成することによって前記の滞流域に付着す
るAl1120.は逆に該滞流域の作用及びCaO含有
耐火物板t1(a)、(b)への吐出流衝突効果に伴う
反応とによる吸着と12 Cab: 7 AΩ20.へ
の低融点化と改質と吐出流の緩和との相乗効果によって
極めて優れた浮上と除去が行なわれる。With this configuration, Al1120. On the other hand, 12 Cab: 7 AΩ20. The synergistic effect of lowering the melting point, reforming, and relaxing the discharge flow results in extremely excellent flotation and removal.
また、このCaO含有耐火物板11(a)、(b)はパ
ラフィン等の防湿剤を塗布するか、あるいは塩化化合物
によって形成し、800〜1200℃での乾燥時の昇熱
によってCaOとせしめ得る等の化合物を用いても良い
。The CaO-containing refractory plates 11(a) and 11(b) may be coated with a moisture-proofing agent such as paraffin, or formed from a chloride compound, and converted into CaO by heating at 800 to 1200°C during drying. Compounds such as the following may also be used.
(実施例)
次に本発明の箱型浸漬ノズルをAQキルトj8 S’A
の連続鋳造に用いた結果を従来法として空隙部と横方向
吐出流からなる箱型の場合を比較して第2表及び第4図
に示すが、明らかに本発明のノズルは表面流速、及び下
向吐出流の分配と減速の点で極めて効果的であり、得ら
れる品質も極めて優れている。(Example) Next, the box-type immersion nozzle of the present invention was used in AQ quilt j8 S'A
Table 2 and Fig. 4 compare the results of continuous casting using the conventional method with a box-type case consisting of a cavity and a lateral discharge flow. It is clear that the nozzle of the present invention has a higher It is very effective in distributing and slowing down the downward discharge flow, and the quality obtained is also very good.
またざらにCaO含有耐火物板を内張した場合を第3表
に示すがいずれも水沫が優れていることがわかる。Furthermore, Table 3 shows cases in which the inner surface was lined with a CaO-containing refractory plate, and it can be seen that the water droplets were excellent in all cases.
第1表
第2表
第3表
(発明の効果)
以上述べた如く本発明の高清浄W4製造用箱型浸漬ノズ
ルを用いることにより注入吐出流の上昇及び下向流の適
用化と十分な減速により安定した鋳造を行なうとともに
、介在物等の品質阻害を抑止した高品質化が達成でき、
しかも簡単な組合せ構造による着脱の実現により製造の
簡素化、及び取付の容易化が可能となった。Table 1 Table 2 Table 3 (Effects of the invention) As described above, by using the box-type immersion nozzle for producing highly clean W4 of the present invention, the injection and discharge flow can be increased, the downward flow can be applied, and the deceleration can be sufficiently reduced. In addition to stable casting, high quality can be achieved by suppressing quality impediments such as inclusions.
Furthermore, the simple combination structure allows for easy attachment and detachment, making it possible to simplify manufacturing and facilitate installation.
第1図(a)は本発明による連続鋳造用箱型浸漬ノズル
の断面図を示し、(b)はA−A’断面矢視図を示し、
第2図(a)は本発明による他の箱型浸漬ノズルの断面
図を示す、(b)はA−A ’断面矢視図を示し、第3
図はCaO含有耐火物板を内張すした際の浸漬ノズルを
示し、第4図は本発明の箱型浸漬ノズルと従来の箱型浸
漬ノズルとの比軟を示す。
符号の説明
1・・・筒状体、 2・・・吐出孔、3・・・空
隙部、 4・・・壁面体、5・・・スラブライン
部、
7・・・サイド吐出孔、 8・・・下向吐出孔、9・・
・溶鋼流通路、
11a、 b・・・CaO含有耐火物板。
第1図 第2図
(a)(a)
子
第4図
(α) (b)vF迫辻
度(α7分) 飼造速度(m7分
)(C)
νu1速度(m/f>)FIG. 1(a) shows a cross-sectional view of a box-type immersion nozzle for continuous casting according to the present invention, and FIG. 1(b) shows a cross-sectional view taken along the line A-A',
FIG. 2(a) shows a sectional view of another box-shaped immersion nozzle according to the present invention, FIG.
The figure shows an immersed nozzle lined with a CaO-containing refractory plate, and FIG. 4 shows the relative softness of the box-shaped immersed nozzle of the present invention and a conventional box-shaped immersed nozzle. Explanation of symbols 1... Cylindrical body, 2... Discharge hole, 3... Cavity part, 4... Wall body, 5... Slab line part, 7... Side discharge hole, 8.・・Downward discharge hole, 9・・
- Molten steel flow path, 11a, b... CaO-containing refractory plate. Fig. 1 Fig. 2 (a) (a) Child Fig. 4 (α) (b) vF abutment degree (α7 min) Feeding speed (m7 min) (C) νu1 speed (m/f>)
Claims (2)
内、筒状体の吐出孔に平行する壁面は筒状体に接して形
成する空隙部を設け、しかも空隙部の下方では他の空隙
部と連通し、該空隙部の溶湯滞流域の吐出孔と対面する
側壁に吐出孔を穿設し、且つ底壁には筒状体の軸心を中
心とした下向き吐出孔を設けたことを特徴とする高清浄
鋼用箱型浸漬ノズル。(1) The outlet side of the discharge hole of the cylindrical body is surrounded by a wall surface, and the wall surface parallel to the discharge hole of the cylindrical body has a cavity formed in contact with the cylindrical body. A discharge hole is formed in the side wall that communicates with another cavity at the bottom and faces the discharge hole in the molten metal retention area of the cavity, and a downward discharge hole centered on the axis of the cylindrical body is provided in the bottom wall. A box-type immersion nozzle for high-clean steel, which is characterized by being equipped with.
内、筒状体の吐出孔に平行する壁面は筒状体に接して形
成する空隙部を設け、しかも空隙部の下方では他の空隙
部と連通し、該空隙部の溶湯滞流域の吐出孔と対面する
側壁に吐出孔を壁面に穿設し、且つ底壁には筒状体の軸
心を中心とした下向き吐出孔を設け、空隙部の内壁面に
CaO含有耐火物板を内張りしたことを特徴とする高清
浄鋼用箱型浸漬ノズル。(2) The outlet side of the discharge hole of the cylindrical body is surrounded by a wall surface, and the wall surface parallel to the discharge hole of the cylindrical body is provided with a cavity formed in contact with the cylindrical body. The lower part communicates with another cavity, and a discharge hole is bored in the side wall facing the discharge hole in the molten metal retention area of the cavity, and the bottom wall has a discharge hole facing downward around the axis of the cylindrical body. A box-shaped immersion nozzle for highly clean steel, characterized in that a discharge hole is provided and the inner wall surface of the cavity is lined with a CaO-containing refractory plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21810086A JPS6376753A (en) | 1986-09-18 | 1986-09-18 | Box type submerged nozzle for high cleanliness steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21810086A JPS6376753A (en) | 1986-09-18 | 1986-09-18 | Box type submerged nozzle for high cleanliness steel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6376753A true JPS6376753A (en) | 1988-04-07 |
Family
ID=16714631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21810086A Pending JPS6376753A (en) | 1986-09-18 | 1986-09-18 | Box type submerged nozzle for high cleanliness steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6376753A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5681498A (en) * | 1994-09-30 | 1997-10-28 | Danieli & C. Officine Meccaniche Spa | Discharge nozzle for a crystallizer for continuous casting of slabs |
US5794682A (en) * | 1995-11-23 | 1998-08-18 | Usinor Sacilor (Societe Anonyme) | Nozzle plant equipped with such a nozzle, for the continuous casting of metal products |
WO2002034434A1 (en) * | 2000-10-27 | 2002-05-02 | The Ohio State University | Method and apparatus for controlling standing surface wave and turbulence in continuous casting vessel |
US6543656B1 (en) | 2000-10-27 | 2003-04-08 | The Ohio State University | Method and apparatus for controlling standing surface wave and turbulence in continuous casting vessel |
-
1986
- 1986-09-18 JP JP21810086A patent/JPS6376753A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5681498A (en) * | 1994-09-30 | 1997-10-28 | Danieli & C. Officine Meccaniche Spa | Discharge nozzle for a crystallizer for continuous casting of slabs |
US5794682A (en) * | 1995-11-23 | 1998-08-18 | Usinor Sacilor (Societe Anonyme) | Nozzle plant equipped with such a nozzle, for the continuous casting of metal products |
WO2002034434A1 (en) * | 2000-10-27 | 2002-05-02 | The Ohio State University | Method and apparatus for controlling standing surface wave and turbulence in continuous casting vessel |
US6543656B1 (en) | 2000-10-27 | 2003-04-08 | The Ohio State University | Method and apparatus for controlling standing surface wave and turbulence in continuous casting vessel |
US6719176B2 (en) | 2000-10-27 | 2004-04-13 | The Ohio State University | Method and apparatus for controlling standing surface wave and turbulence in continuous casting vessel |
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