JPS6376752A - Box type submerged nozzle for high cleanliness steel - Google Patents
Box type submerged nozzle for high cleanliness steelInfo
- Publication number
- JPS6376752A JPS6376752A JP21809986A JP21809986A JPS6376752A JP S6376752 A JPS6376752 A JP S6376752A JP 21809986 A JP21809986 A JP 21809986A JP 21809986 A JP21809986 A JP 21809986A JP S6376752 A JPS6376752 A JP S6376752A
- Authority
- JP
- Japan
- Prior art keywords
- holes
- discharge hole
- wall
- cylindrical body
- flow
- 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 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 230000003749 cleanliness Effects 0.000 title abstract description 4
- 238000007654 immersion Methods 0.000 claims description 15
- 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 6
- 238000007667 floating Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 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
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000519695 Ilex integra Species 0.000 description 1
- 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
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 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
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 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
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 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）
近年溶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。(Prior Art) In recent years, continuous casting has been widely adopted in the casting of molten 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、これ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：１τ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ＳｉＯ□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 these problems during 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. A submerged nozzle (hereinafter simply referred to as a flow box nozzle) is used, in which a closed type: 1τ flow box is fixedly installed, and a plurality of discharge ports are provided on the peripheral wall of the flow box (hereinafter simply referred to as a flow box nozzle), or As shown in Japanese Patent No. 54836, an immersed nozzle (hereinafter simply referred to as "Immersion nozzle") is used to prevent nozzle clogging by lining the inside of a conventional outer peripheral refractory material with a SiO□-based refractory containing 1.0 to 10.0% CaO. ) 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
面の撹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 coagulation due to washing and development of the solidified shell or disturbance of the hot water 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Ａ Ｑ ２０□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ず、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 AQ20□ system will adhere to the molten metal retention area, and conversely, this will lead to serious quality defects due to their separation and contamination. . On the other hand, with lined renozzles, in addition to being unable to achieve sufficient deceleration and relaxation of the discharge flow, the inner lined refractory material cannot sufficiently capture inclusions and reform the shape, and conversely, it is difficult to wash and develop solidified shells. It has drawbacks such as non-uniform solidification caused by the process, or insertion of inclusions caused by the discharge flow, which leads to 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、凝固の均一化、湯面擾乱の防止、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提供にある。The present invention aims to alleviate the discharge flow, which is a drawback of conventional immersion nozzles, and achieves uniform solidification, prevention of molten metal surface disturbance, and prevention of the promotion and insertion of inclusions, thereby stably casting high-quality slabs. Our goal is to provide a box-type immersion nozzle that enables this.
（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壁面で囲繞し、その内、筒状体の吐
出孔に平行なる壁面は筒状体に接して形成する空隙部を
設け、且つ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、且つ底壁には下向き吐出孔をもう
け、流速を緩和した下向流とすることにより、及び更に
上記の空隙部の内壁面にＣａＯ含有耐火物を内張すした
ことより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。The present invention was achieved based on these findings, and the outlet side of the discharge hole of the cylindrical body is surrounded by a wall surface, of which the wall surface parallel to the discharge hole of the cylindrical body is A discharge hole is provided in the side wall facing the discharge hole in the molten metal retention area of the void, and a downward discharge hole is provided in the bottom wall to reduce the flow velocity. A submerged nozzle that solves the above technical problems at once was realized by making the above-mentioned fluid flow and by lining the inner wall surface of the above-mentioned cavity with a CaO-containing refractory.
（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図は本発明による連ｖｔＵａ用笛型浸漬ノズルの断
面図を示し、第２図は第１図のＡ−Ａ’断面矢視図を示
す。FIG. 1 shows a cross-sectional view of a flute-type submerged nozzle for continuous VtUa according to the present invention, and FIG. 2 shows a cross-sectional view taken along the line AA' in FIG.
図において１は例えばアルミナ−Ｃ系、５Ｌ−Ｃ系ある
いはＺｒＯ□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が設けられている。In the figure, reference numeral 1 is a cylindrical refractory made of, for example, alumina-C, 5L-C, or ZrO□, and a discharge hole 2 having a suitable downward angle is provided at its lower end.
また、吐出孔２には該吐出孔２を囲繞した空隙部３が壁
面体４によって設けである。この壁面体４は耐火物素材
からなり上ｕ４ａと側壁４ｂ、及び底ｌ１４ｃ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。筒状体はこの状態にて吐出孔２に平行す
る側壁４ｂと底壁４ｃとに同様に嵌挿され、前記上壁４
ａと一体に係合して空隙部３を形成するとともに、底壁
４ｃを筒状体１の下端部にピン６の差込みにより固設（
第１図）しである。この底Ｑ４ｃの筒状体１への固設は
ピンの差込みに限ることなくクサビあるいは螺合等の通
常の係止手段を用いることもできる。なお図中９は溶鋼
流通路である。Further, the discharge hole 2 is provided with a cavity 3 surrounding the discharge hole 2 by a wall body 4. This wall body 4 is made of a refractory material and consists of an upper wall u4a, a side wall 4b, and a bottom l14c.The lower end of the cylindrical body 1 is fitted into the upper wall 4a, and a tapered part of the slag line portion 5 It is competitively locked at 5a. In this state, the cylindrical body is similarly fitted into the side wall 4b and the bottom wall 4c parallel to the discharge hole 2, and is inserted into the upper wall 4.
a to form the cavity 3, and the bottom wall 4c is fixed to the lower end of the cylindrical body 1 by inserting a pin 6 (
Figure 1). The fixing of the bottom Q4c to the cylindrical body 1 is not limited to the insertion of a pin, but ordinary locking means such as a wedge or screw may also be used. 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には浸漬ノズルと接
しない（ＩｌｌＩｕ４ｂが吐出孔と対向する部位で、且
つ吐出孔２の上限部位近傍高さに、側面吐出孔７が穿設
してあり、しかも吐出孔２と同一側の底Ｑ４ｃには円形
の下向吐出孔８が設けてあり、この下向吐出孔８は円形
に限らず楕円若しくは矩形であっても良い。In addition, the wall body 4 forming the cavity 3 does not come into contact with the immersion nozzle (a side discharge hole 7 is bored at a portion where the IllIu 4b faces the discharge hole and at a height near the upper limit portion of the discharge hole 2). Moreover, a circular downward discharge hole 8 is provided in the bottom Q4c on the same side as the discharge hole 2, and the downward discharge hole 8 is not limited to a circular shape but may be oval or rectangular.
このようにして筒状体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の溶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Ａ［、Ｏ，
系の析出付着物を形成する。この付着物はかなり生長す
ると剥離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。ｌ、０３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量の側面
吐出孔７の流れによって行なう。The molten steel poured into the cylindrical body 1 in this way flows out from the discharge hole 2 at a considerable speed, but is rapidly decelerated due to the synergistic effect of collision with the side wall 4b and relaxation by the 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 has A[, O,
Forms deposits on the system. When this deposit grows considerably, it causes quality problems due to peeling and insertion, so it is mixed with this adhesion prevention method. The floating of the 1, 03 type precipitates and the melting of the mold surface powder are simultaneously performed by the flow through the small-volume side discharge hole 7.
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。さらにまた
、前記の吐出流の減速をより向上せしめるために下向吐
出孔８の適宜上部に凸状体１０を突設することにより緩
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。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。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. Furthermore, in order to further improve the deceleration of the discharge flow described above, a convex body 10 is protruded from the appropriate upper part of the downward discharge hole 8, so that a synergistic effect of the relieved discharge flow and the side discharge flow can be used. Objects can be floated and removed more effectively. Also, to further improve the flotation and removal of inclusions.
第３図、第４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Ａｌ２２０．系介在物の捕促
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。As shown in FIGS. 3 and 4, a CaO-containing refractory plate 11 as shown in Table 1 is placed on the wall surface forming this void 3.
A and B are fixed in place by mortar or baking or by conventional means. This CaO-containing refractory plate 11a = b
CaO: It is necessary to contain 50 to 95%, but if it is less than 50%, Al220. The trapping of system inclusions and the reforming effect 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１盲記の滞流域に付着
する１Ｉ２０．は逆に該滞流域の作用及びＣａ０含有耐
火物板１１（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 Ａ Ｑ ２０．
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, 1I20. On the other hand, 12 Cab: 7 A Q 20.
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°Ｃ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。In addition, these CaO-containing refractory plates 11(a) and 11(b) are coated with a moisture-proofing agent such as paraffin, or are formed from a chloride compound, and are made to form CaO by increasing the heat during drying at 800 to 1200°C. Compounds such as those obtained may also be used.
（実施例）
次に本発明の箱型浸漬ノズルをＡＱギルド溶鋼の連続鋳
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テ
表及び第榛図に示すが、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 results of using the box type immersion nozzle of the present invention for continuous casting of AQ guild molten steel are compared with the case of a box type consisting of a gap and a lateral discharge flow as a conventional method. As shown in Fig. 1, it is clear that the nozzle of the present invention is extremely effective in terms of surface flow velocity and distribution and deceleration of the downward discharge flow, and the resulting quality is also very good.
またさらに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洗が優れていることがわかる。Furthermore, Table 3 shows cases in which a CaO-containing refractory plate was lined, and it can be seen that all cases were excellent in washing with water.
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鋼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 manufacturing high-clean steel of the present invention, the injection and discharge flow can be increased, the downward flow can be applied, and sufficient deceleration can be achieved. In addition to performing stable casting,
High quality can be achieved by suppressing quality impediments such as inclusions, and in addition, the simple combination structure enables attachment and detachment, making it possible to simplify manufacturing and facilitate installation.
第１図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２図は第１図の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図は第３図のＢ−Ｂ’断面矢視図を示
し、第５図は本発明の箱型浸漬ノズルと従来の箱型浸漬
ノズルとの比較を示す。
１・・・筒状体、 ２・・・吐出孔、３・・・空
隙部、 ４・・・壁面体、５・・・スラブライン
部、６・・・ピン、７・・・サイド吐出孔、 ８・・・
下向吐出孔、９・・・ｉ８ｍ流通路、
１１ａ、 ｂ・・・ＣａＯ含有耐火物板。
第１図
８空７兇近
第５図
（ｃＬ） （３）＠進ｕ
Ｃｍ外） 餅遵連斐（ｌ紛）（Ｃ）
鋼逆建度（／７Ｖ＋）FIG. 1 shows a cross-sectional view of a box-type immersion nozzle for continuous casting according to the present invention, FIG. 2 shows a cross-sectional view taken along the line A-A' in FIG. 1, and FIG. 3 shows a CaO-containing refractory plate inside. The immersion nozzle is shown when it is stretched, FIG. 4 is a cross-sectional view taken along the line B-B' in FIG. 3, and FIG. shows. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 2... Discharge hole, 3... Cavity part, 4... Wall body, 5... Slab line part, 6... Pin, 7... Side discharge hole , 8...
Downward discharge hole, 9...i8m flow path, 11a, b...CaO-containing refractory plate. Figure 1 8 Sky 7 Close Figure 5 (cL) (3) @ Shinu
Outside of Cm) Mochi Zunrenbi (L) (C) Steel Gakkendo (/7V+)
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、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 is provided with a cavity formed in contact with the cylindrical body. A box-shaped immersion nozzle for highly clean steel, characterized in that a discharge hole is provided in the side wall facing the discharge hole in the molten metal retention area, and a downward discharge hole is provided in the bottom wall.
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、該空隙部の溶湯滞溜域の吐出孔と
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
張りしてなることを特徴とする高清浄鋼用箱型浸漬ノズ
ル。(2) Each outlet side of the discharge hole of the cylindrical body is surrounded by a wall surface, and a wall surface parallel to the discharge hole of the cylindrical body is provided with a cavity formed in contact with the cylindrical body, and the cavity is A discharge hole is provided in the side wall facing the discharge hole in the molten metal retention area, a downward discharge hole is provided in the bottom wall, and the inner wall surface of the cavity is lined with a CaO-containing refractory plate. A box-type immersion nozzle for high-clean steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21809986A JPS6376752A (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 |
|---|---|---|---|
| JP21809986A JPS6376752A (en) | 1986-09-18 | 1986-09-18 | Box type submerged nozzle for high cleanliness steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6376752A true JPS6376752A (en) | 1988-04-07 |
Family
ID=16714616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21809986A Pending JPS6376752A (en) | 1986-09-18 | 1986-09-18 | Box type submerged nozzle for high cleanliness steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6376752A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5227078A (en) * | 1992-05-20 | 1993-07-13 | Reynolds Metals Company | Flow-vectored downspout assembly and method for using same |
| US5603860A (en) * | 1994-07-25 | 1997-02-18 | Voest-Alpine Industrieanlagenbau Gmbh | Immersed casting tube |
| 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 |
| US6073680A (en) * | 1996-09-16 | 2000-06-13 | Ishikawajima-Harima Heavy Industries Company Limtied | Strip casting |
| JP2011504416A (en) * | 2007-07-04 | 2011-02-10 | テクコム ゲーエムベーハー | Immersion nozzle |
-
1986
- 1986-09-18 JP JP21809986A patent/JPS6376752A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5227078A (en) * | 1992-05-20 | 1993-07-13 | Reynolds Metals Company | Flow-vectored downspout assembly and method for using same |
| US5603860A (en) * | 1994-07-25 | 1997-02-18 | Voest-Alpine Industrieanlagenbau Gmbh | Immersed casting tube |
| 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 |
| US6073680A (en) * | 1996-09-16 | 2000-06-13 | Ishikawajima-Harima Heavy Industries Company Limtied | Strip casting |
| JP2011504416A (en) * | 2007-07-04 | 2011-02-10 | テクコム ゲーエムベーハー | Immersion nozzle |
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