JPH09279224A - Immersion pipe - Google Patents
Immersion pipeInfo
- Publication number
- JPH09279224A JPH09279224A JP8088190A JP8819096A JPH09279224A JP H09279224 A JPH09279224 A JP H09279224A JP 8088190 A JP8088190 A JP 8088190A JP 8819096 A JP8819096 A JP 8819096A JP H09279224 A JPH09279224 A JP H09279224A
- Authority
- JP
- Japan
- Prior art keywords
- bricks
- brick
- trapezoidal
- immersion pipe
- jack arch
- 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.)
- Withdrawn
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は二次精錬設備である
ＲＨ、ＤＨ、ＣＡＳ等の浸漬管での最下段れんがの熱ス
ポールに起因したれんがの脱落を抑制して高耐用とした
浸漬管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion pipe having a high durability by suppressing the falling of the brick caused by the heat spall of the lowermost brick in the immersion pipe of secondary refining equipment such as RH, DH, and CAS. .
【０００２】[0002]
【従来の技術】二次精錬設備であるＲＨ、ＤＨ、ＣＡＳ
等において、浸漬管は脱ガスや成分調整のため、溶鋼の
環流や保持を行う部位となっている。ここでの内張りれ
んが材質としては、マグネシア−クロム質れんがが用い
られ、そこでの築炉構造は図５−（ａ）に示すような、
れんが１が浸漬管の下端部までのびた構造、あるいは、
図５−（ｂ）に示すような、キャスタブル２上にれんが
１を積んだ構造をとる。また、図５−（ａ）のＡ−Ａ断
面図（ｃ）に示すような、バチ型の内張りれんがはお互
いの膨張による迫りと芯金３に取り付けられたれんが受
け４により支持されている。2. Description of the Related Art RH, DH, CAS which are secondary refining equipment
In the above, the dip pipe is a part for circulating and holding molten steel for degassing and component adjustment. Magnesia-chromic brick is used as the material of the lining brick here, and the furnace construction there is as shown in Fig. 5- (a).
Brick 1 extends to the lower end of the dip tube, or
As shown in FIG. 5- (b), the castable 2 has a structure in which bricks 1 are stacked. Further, as shown in a sectional view (c) taken along the line AA of FIG. 5 (a), the bee-shaped lining bricks are supported by the impulsion caused by mutual expansion and the brick receiver 4 attached to the cored bar 3.
【０００３】ところで、この最下段れんがは、処理中に
は１６００℃以上溶鋼に浸漬され、待機中には２５℃の
大気中に放冷され、大きな温度変化による熱襲撃を受け
る。このために、れんがは熱スポールを発生し、れんが
に亀裂を発生させ、この熱衝撃の繰り返しにより、れん
がの亀裂が進展し、最終的にれんがが割れ、局所的なれ
んがの脱落を生じる。そして、この脱落により、内張り
れんが構造の破壊に加え、溶鋼がれんが背面に侵入し、
芯金を溶損させ、内張れんがの全体の脱落を発生させ、
浸漬管の耐用性を低下させる。By the way, the lowermost brick is immersed in molten steel at 1600 ° C. or higher during processing, and is allowed to cool in the atmosphere at 25 ° C. during standby, and is subjected to thermal attack due to a large temperature change. For this reason, the bricks generate thermal spalls and cracks in the bricks. By repeating this thermal shock, the cracks in the bricks progress, and finally the bricks crack and local bricks fall off. Due to this drop, in addition to the destruction of the lining brick structure, molten steel penetrated into the back surface of the brick,
It melts the core metal, causing the entire lining brick to fall off,
It reduces the durability of the dip tube.
【０００４】従来は、このような問題を回避・抑制する
ために、以下のような方法が取られている。例えば、特
開平６−１２８６２２号公報と実開平１−１１９０４１
号公報には、れんが背面をテーパーとして支持を行う、
いわゆる、「トーパー受け」を設けることによって脱落
を抑制する方法が開示されている。Conventionally, in order to avoid or suppress such problems, the following methods have been adopted. For example, JP-A-6-128622 and Japanese Utility Model Laid-Open No. 1-119041.
In the gazette, the back surface of the brick is tapered to support it.
There is disclosed a method of suppressing dropping by providing a so-called "toper receiver".
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、近年、
高純度鋼生産のために吹酸処理や金属Ａｌ添加による溶
鋼温度の補償処理等が多く実施され、溶鋼温度は上昇傾
向にある。このために、特に最下段れんがは激しい温度
変化を受け、熱スポールにより急速に割れが進行する現
象が顕著となっている。また、生産効率向上のために、
浸漬管の大径化が進んでおり、れんが同士の迫り力が低
下し、割れたれんがが脱落しやすくなり、同時に溶鋼環
流量も増加傾向にあるために、はずれやすくなったれん
がが溶鋼環流の力や浮力により、もっていかれる問題が
生じている。この様な損耗に対して、前述のようなれん
が背面の「テーパー受け」では、割れたれんがが下方へ
脱落する力には対抗できるが、溶鋼環流により、もって
いかれる力に対しては対抗できない。However, in recent years,
For producing high-purity steel, a lot of processes such as blowing acid treatment and compensating treatment of molten steel temperature by addition of metallic Al are carried out, and the molten steel temperature tends to rise. For this reason, a phenomenon in which cracks rapidly progress due to thermal spalls is remarkable, especially in the lowest-stage bricks, which undergoes a drastic temperature change. Also, to improve production efficiency,
As the diameter of the immersion pipe has been increasing, the pressing force between the bricks has decreased, cracked bricks are likely to fall off, and at the same time, the flow rate of molten steel ring tends to increase. Forces and buoyancy are causing problems to be addressed. Against such wear, the "tapered pad" on the back surface of the brick as described above can counter the force of the broken brick falling off, but it cannot counteract the force taken by the molten steel reflux. .
【０００６】本発明は二次精錬設備であるＲＨ、ＤＨ、
ＣＡＳ等での浸漬管での、少なくとも最下段れんがの熱
スポールに起因した局所的な脱落を抑制し、設備の耐用
性向上と共に生産性の向上が図るものである。The present invention is a secondary refining facility, RH, DH,
It is intended to suppress at least the local drop-off of the lowermost brick due to the heat spall in the dipping pipe in CAS or the like, and to improve the durability of the equipment and the productivity.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決する手
段を鋭意研究した結果、以下のことを見出した。すなわ
ち、二次精錬設備であるＲＨ、ＤＨ、ＣＡＳ等の浸漬管
において、内張りれんが積み構造のうち、最下段をジャ
ックアーチ構造とし、この構造の２箇所以上を受け耐火
物で支持し、これらの耐火物をマグネシア系またはアル
ミナ系の炭素含有れんがとすることよりれんがの脱落を
抑制する。[Means for Solving the Problems] As a result of intensive research on means for solving the above problems, the following has been found out. That is, in dipping pipes such as RH, DH, and CAS that are secondary refining equipment, the bottom of the lined brick stack structure is the jack arch structure, and two or more places of this structure are supported by refractory and these The use of magnesia-based or alumina-based carbon-containing bricks as refractory materials prevents the bricks from falling off.
【０００８】さらに、菱形れんがと逆台形れんがをジャ
ックアーチ構造積み、台形れんがでこれを受けることに
より、または、片ダボを設けた菱形れんがと両ダボを設
けた逆台形れんがをジャックアーチ構造に積み、両ダボ
を設けた台形れんがでこれを受けることにより、熱スポ
ール起因で割れたれんがの脱落を抑制する。Further, rhomboid bricks and inverted trapezoidal bricks are stacked in a jack arch structure and received by trapezoidal bricks, or rhomboid bricks provided with one dowel and inverted trapezoidal bricks provided with both dowels are stacked in a jack arch structure. By receiving this with a trapezoidal brick provided with both dowels, it is possible to prevent the broken brick from falling off due to the heat spall.
【０００９】あるいは、台形れんがと逆台形れんがをジ
ャックアーチ構造積み、台形れんがでこれを受けること
により、または、片ダボを設けた台形れんがと両ダボを
設けた逆台形れんがをジャックアーチ構造に積み、両ダ
ボを設けた台形れんがでこれを受けることにより、熱ス
ポール起因で割れたれんがの脱落を抑制する。Alternatively, trapezoidal bricks and inverted trapezoidal bricks are stacked in a jack arch structure and received by trapezoidal bricks, or trapezoidal bricks with one dowel and inverted trapezoidal bricks with both dowels are stacked in a jack arch structure. By receiving this with a trapezoidal brick provided with both dowels, it is possible to prevent the broken brick from falling off due to the heat spall.
【００１０】[0010]
【発明の実施の形態】以下、本発明を詳細に、図１、図
２、図３、および図４を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to FIGS. 1, 2, 3, and 4.
【００１１】図１は本発明を適用した浸漬管の具体例の
概略図である。本発明では、内張りれんが積み構造のう
ち、最下段をジャックアーチ構造とし、この構造の２箇
所以上を受け耐火物で支持する。このジャックアーチ構
造は、れんが積みの建築物の天井に用いられてきた構造
である。操業中に、最下段れんがが割れたとしても、れ
んがとれんがの接触面が傾いているため、れんが同士の
膨張により生じる迫り力が、れんがの脱落を防止する力
として働くことから、従来の構造に比べ、割れたれんが
は滑り落ち難く、構造的にも安定である。したがって、
溶鋼環流や浮力等によってもって行かれ難い。このこと
から、従来の浸漬管で見られた最下段れんがの脱落や分
離を抑制できる。FIG. 1 is a schematic view of a specific example of a dip tube to which the present invention is applied. In the present invention, the lowermost step of the brick lining structure is a jack arch structure, and the refractory supports two or more points of this structure. This jack arch structure is a structure that has been used for the ceiling of a brick building. Even if the bottommost brick is broken during operation, the contact surface of the brick and the brick is inclined, so the pressing force generated by the expansion of the bricks works as a force to prevent the brick from falling off. Compared to, broken bricks are less likely to slip off and are structurally stable. Therefore,
It is difficult to get due to molten steel reflux and buoyancy. From this, it is possible to suppress the falling-off and separation of the lowest-stage brick found in the conventional immersion pipe.
【００１２】ジャックアーチ構造の受けに用いられる台
形れんがを少なくとも２組以上設けることによって、一
組の受けれんがが破壊しても、最下段れんがが構成する
ジャックアーチ構造の破壊を回避することができる。さ
らに、これらのれんがの材質を通常用いられるマグネシ
ア−クロム質れんがからマグネシア系またはアルミナ系
の炭素含有れんがとするべきである。ここでマグネシア
系炭素含有れんがとは主成分中にマグネシアと炭素を含
むものを指す。アルミナ系炭素含有れんがとは主成分中
にアルミナと炭素を含むものを指す。これらのれんがは
耐熱スポール性がマグネシア−クロム質れんがより良好
であり、熱スポールによる受けれんがが破壊を抑制でき
る。また、この受けれんがを集中的に補修することによ
って、最下段れんがを十分に保持し、割れたれんがの脱
落を抑制でき、同時に補修時間の短縮を図ることができ
る。By providing at least two sets of trapezoidal bricks used for receiving the jack arch structure, even if one set of receiving bricks is destroyed, it is possible to avoid the destruction of the jack arch structure formed by the lowermost brick. . Further, the materials of these bricks should be magnesia-based or alumina-based carbon-containing bricks from commonly used magnesia-chromic bricks. Here, the magnesia-based carbon-containing brick refers to one containing magnesia and carbon in the main components. Alumina-based carbon-containing brick refers to one containing alumina and carbon in the main components. These bricks have better thermal spall resistance than magnesia-chromic bricks, and the bricks received by hot spalls can suppress the destruction. Further, by intensively repairing the receiving bricks, it is possible to sufficiently hold the lowermost bricks, prevent the broken bricks from falling off, and at the same time shorten the repair time.
【００１３】最下段のジャックアーチ構造の構成として
は、図１（ａ），（ｂ）に示すような台形れんが１と逆
台形れんが３、およびこの構造を受ける台形れんが２で
構成され、それより上段はバチ型のれんが５で構成され
る。あるいは、図３（ａ），（ｂ）に示すような、菱形
れんが１と逆台形れんが３、およびこの構造を受ける台
形れんが２で構成され、それより上段はバチ型のれんが
５で構成される。以上の構造で、台形れんが２は、芯金
６に設けられたれんが受け７で保持され、芯金６の周り
には、キャスタブル４を施工する。ここで、菱形れんが
および台形れんがの鋭角部の傾きは好ましく５０度以
上、９０度未満とする。５０度未満の傾きの場合、受け
の台形れんがの下底長さが長くなり、れんがの耐熱スポ
ール性を低下させる場合がある。一方、９０度以上で
は、処理中にれんが同士に迫りが生じた場合でも、れん
がを保持する力が小さい。The structure of the lowermost jack arch structure is composed of a trapezoidal brick 1 and an inverted trapezoidal brick 3 as shown in FIGS. 1 (a) and 1 (b), and a trapezoidal brick 2 which receives this structure. The upper row is composed of a bee-shaped brick 5. Alternatively, as shown in FIGS. 3 (a) and 3 (b), the diamond-shaped brick 1 and the inverted trapezoidal brick 3 and the trapezoidal brick 2 that receives this structure are configured, and the upper stage is configured by the bee-shaped brick 5. . With the above structure, the trapezoidal brick 2 is held by the brick receiver 7 provided on the core metal 6, and the castable 4 is installed around the core metal 6. Here, the inclinations of the acute-angled portions of the rhombic bricks and the trapezoidal bricks are preferably 50 degrees or more and less than 90 degrees. If the inclination is less than 50 degrees, the lower base length of the trapezoidal brick of the receiver becomes long, and the heat-resistant spall resistance of the brick may be deteriorated. On the other hand, when the angle is 90 degrees or more, the force for holding the brick is small even when the bricks come close to each other during the processing.
【００１４】図２および図４は、図１および図３の構造
に脱落と浮上防止の更なる改善を行ったものである。図
２に示す構造は、片ダボを設けた台形れんが１と両ダボ
を設けた逆台形れんが３、および、これを受ける両ダボ
を設けた台形れんが２で構成される。一方、図４に示す
構造は、片ダボを設けた菱形れんが１と両ダボを設けた
逆台形れんが３、および、これを受ける両ダボを設けた
台形れんが２で構成される。ここで、片ダボ図２−
（ｃ）あるいは図４−（ｃ）に示すような、台形れんが
側面の片方に凸部８が、片方に凹部９がある構造を指
し、両ダボ構造とは図２−（ｄ）あるいは図４−（ｄ）
に示すような台形れんが両側面に凸部８がある構造を指
す。図２および図４に示すダボ構造を持たせることによ
って、ジャックアーチ構造にくさび機構が加わり、最下
段れんがの脱落や分離の抑制をより確実できる。FIGS. 2 and 4 show the structure of FIGS. 1 and 3 with further improvements in prevention of falling and floating. The structure shown in FIG. 2 includes a trapezoidal brick 1 provided with one dowel, an inverted trapezoidal brick 3 provided with both dowels, and a trapezoidal brick 2 provided with both dowels for receiving the trapezoidal bricks. On the other hand, the structure shown in FIG. 4 is composed of a rhombic brick 1 provided with one dowel, an inverted trapezoidal brick 3 provided with both dowels, and a trapezoidal brick 2 provided with both dowels for receiving the same. Here, single dowel figure 2-
As shown in (c) or FIG. 4- (c), the trapezoidal brick has a convex portion 8 on one side and a concave portion 9 on one side, and the double dowel structure is shown in FIG. 2- (d) or FIG. -(D)
A trapezoidal brick as shown in (1) indicates a structure having convex portions 8 on both side surfaces. By providing the dowel structure shown in FIG. 2 and FIG. 4, a wedge mechanism is added to the jack arch structure, and it is possible to more reliably prevent the lowermost brick from falling off or separating.
【００１５】[0015]
【実施例】以下、本発明の実施例を以下に説明する。EXAMPLES Examples of the present invention will be described below.
【００１６】処理能力２００ｔ／ｃｈのＲＨ槽に本発明
を適用した場合の浸漬管１〜７と従来技術８〜１０の耐
用性の違いを表１に示す。表１において、最下段構造と
は、図１から図４までに示す本発明と、図５に示す従来
構造を指す。また、受けれんが材質とは、ＭｇＯ−Ｃｒ
2 Ｏ3 焼結れんが、ＭｇＯ−Ｃれんが、Ａｌ2 Ｏ3 −Ｃ
れんがおよびＡｌ2 Ｏ3 −ＳｉＣ−Ｃれんがを指す。こ
れらの耐スポール性は表２に示す通りである。Table 1 shows the difference in durability between the immersion pipes 1 to 7 and the conventional techniques 8 to 10 when the present invention is applied to an RH tank having a processing capacity of 200 t / ch. In Table 1, the lowest structure refers to the present invention shown in FIGS. 1 to 4 and the conventional structure shown in FIG. The material of the brick is MgO-Cr.
2 O 3 sintered brick, MgO-C brick, Al 2 O 3 -C
It refers to bricks and Al 2 O 3 -SiC-C brick. These spall resistances are as shown in Table 2.
【００１７】表２中の耐スポール性回数とは、１５００
℃での空冷熱スポール試験において、耐火物試料が熱ス
ポールにより破壊するまでの回数を示す。この回数が大
きいほど耐熱スポール性に優れる。表２において、Ｃ含
有系れんがはＭｇＯ−Ｃｒ2Ｏ3 焼結れんがに比べ、良
好な耐スポール性を示している。The number of spall resistances in Table 2 is 1500.
In air-cooled thermal spall test at ℃, it shows the number of times until the refractory sample was destroyed by thermal spall. The larger this number is, the better the heat resistant spalling property is. In Table 2, C-containing systems bricks compared to MgO-Cr 2 O 3 sintered brick, shows good spalling resistance.
【００１８】表１の総合評価とは、浸漬管寿命が６０ｃ
ｈ以上で、最下段れんがの脱落がない場合を○、寿命が
６０ｃｈ未満か、あるいは、最下段れんがの脱落が発生
した場合を×としたものである。従来技術を適用した場
合に比べ、本発明の総合評価でいずれも○であり、浸漬
管の内張り最下段れんがの脱落なしに６０ｃｈ以上の耐
用性を確保することができた。さらに、最下段から複数
の段に対して、ジャックアーチ構造とした場合も同様で
ある。The comprehensive evaluation in Table 1 means that the life of the immersion pipe is 60c.
When h or more, there is no dropout of the lowermost brick, and when the life is less than 60 ch or when the fallout of the lowermost brick occurs, it is marked with x. Compared with the case of applying the conventional technique, all were evaluated as ◯ in the comprehensive evaluation of the present invention, and the durability of 60 ch or more could be secured without the falling of the lowermost brick in the dipping pipe lining. Further, the same applies when the jack arch structure is used from the lowest stage to a plurality of stages.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【発明の効果】本発明は二次精錬設備であるＲＨ、Ｄ
Ｈ、ＣＡＳ等の浸漬管での最下段れんがの熱スポールに
起因したれんがの脱落を抑制し、浸漬管の耐用性向上と
共に生産性の向上が図れる。INDUSTRIAL APPLICABILITY The present invention is the secondary refining equipment RH, D
It is possible to prevent the brick from falling off due to the heat spall of the lowermost brick in the immersion pipe such as H and CAS, and to improve the durability of the immersion pipe and the productivity.
【図１】（ａ），（ｂ）：菱形れんがと逆台形れんがを
用いてジャックアーチ構造とした本発明浸漬管の具体例
を示す概略図。1A and 1B are schematic views showing a specific example of a dip tube of the present invention having a jack arch structure using rhombus bricks and inverted trapezoid bricks.
【図２】（ａ），（ｂ），（ｃ），（ｄ）：片ダボを設
けた菱形れんがと両ダボを設けた逆台形れんがを用い
て、ジャックアーチ構造とした本発明浸漬管の具体例を
示す概略図。2 (a), (b), (c), (d): A dip tube of the present invention having a jack arch structure using a rhombic brick provided with one dowel and an inverted trapezoid brick provided with both dowels. Schematic which shows a specific example.
【図３】（ａ），（ｂ）：台形れんがと逆台形れんがを
用いて、ジャックアーチ構造とした本発明浸漬管の具体
例を示す概略図。3A and 3B are schematic views showing a specific example of the immersion pipe of the present invention having a jack arch structure using trapezoidal bricks and inverted trapezoidal bricks.
【図４】（ａ），（ｂ），（ｃ），（ｄ）：片ダボを設
けた台形れんがと両ダボを設けた逆台形れんがを用い
て、ジャックアーチ構造とした本発明浸漬管の具体例を
示す概略図。FIG. 4 (a), (b), (c), (d): A trapezoidal brick provided with one dowel and an inverted trapezoidal brick provided with both dowels are used to form a dipping pipe of the present invention having a jack arch structure. Schematic which shows a specific example.
【図５】（ａ），（ｂ），（ｃ）：従来の浸漬管構造の
概略図。5 (a), (b), (c): Schematic view of a conventional dip tube structure.
１…台形れんが ５…バチ型れ
んが ２…台形れんが ６…芯金 ３…逆台形れんが ７…れんが受
け ４…キャスタブル ８…凸部 ９…凹部1 ... Trapezoidal brick 5 ... Dovetail type brick 2 ... Trapezoidal brick 6 ... Core metal 3 ... Reverse trapezoidal brick 7 ... Brick receptacle 4 ... Castable 8 ... Convex portion 9 ... Recessed portion
Claims (7)
等の浸漬管において、内張りれんが積み構造のうち、少
なくとも最下段をジャックアーチ構造としたことを特徴
とする浸漬管。1. RH, DH, CAS which are secondary refining equipment
In the dipping pipes such as the above, at least the lowermost step of the lined brick stacking structure has a jack arch structure.
積みを支持する受けの耐火物を２箇所以上設けたことを
特徴とする請求項１記載の浸漬管。2. The immersion pipe according to claim 1, wherein refractory materials for receiving the bricks lined with a jack arch structure are provided at two or more places.
ミナ系の炭素含有れんがとすることを特徴とする請求項
１または２記載の浸漬管。3. The immersion pipe according to claim 1, wherein the refractory material of the receiver is a magnesia-based or alumina-based carbon-containing brick.
ャックアーチ構造に積み、台形れんがでこれを受ける構
造としたことを特徴とする請求項１または２または３記
載の浸漬管。4. The dip tube according to claim 1, wherein rhomboid bricks and inverted trapezoidal bricks are stacked in a jack arch structure and trapezoidal bricks are used to receive them.
がをジャックアーチ構造に積み、両ダボを設けた台形れ
んがでこれを受ける構造としたことを特徴とする請求項
１または２または３記載の浸漬管。5. The structure according to claim 1, wherein a rhomboid brick and an inverted trapezoidal brick provided with both dowels are stacked in a jack arch structure, and a trapezoidal brick provided with both dowels receives the bricks. Dip tube.
ャックアーチ構造に積み、台形れんがでこれを受ける構
造としたことを特徴とする請求項１または２または３記
載の浸漬管。6. The immersion pipe according to claim 1, wherein the trapezoidal bricks and the inverted trapezoidal bricks are used for stacking in a jack arch structure, and the trapezoidal bricks are used to receive the same.
けた逆台形れんがをジャックアーチ構造に積み、両ダボ
を設けた台形れんがでこれを受ける構造としたことを特
徴とする請求項１または２または３記載の浸漬管。7. A trapezoidal brick provided with one dowel and an inverted trapezoidal brick provided with both dowels are stacked in a jack arch structure, and a trapezoidal brick provided with both dowels receives the trapezoidal brick. Or the immersion tube according to 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8088190A JPH09279224A (en) | 1996-04-10 | 1996-04-10 | Immersion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8088190A JPH09279224A (en) | 1996-04-10 | 1996-04-10 | Immersion pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09279224A true JPH09279224A (en) | 1997-10-28 |
Family
ID=13935993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8088190A Withdrawn JPH09279224A (en) | 1996-04-10 | 1996-04-10 | Immersion pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09279224A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017015370A (en) * | 2015-07-06 | 2017-01-19 | 新日鐵住金株式会社 | Lining structure of refractory of cylindrical furnace and refractory |
-
1996
- 1996-04-10 JP JP8088190A patent/JPH09279224A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017015370A (en) * | 2015-07-06 | 2017-01-19 | 新日鐵住金株式会社 | Lining structure of refractory of cylindrical furnace and refractory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030701 |