JPH01195240A - Method for repairing circulating flow tube in vacuum degassing furnace - Google Patents
Method for repairing circulating flow tube in vacuum degassing furnaceInfo
- Publication number
- JPH01195240A JPH01195240A JP1833588A JP1833588A JPH01195240A JP H01195240 A JPH01195240 A JP H01195240A JP 1833588 A JP1833588 A JP 1833588A JP 1833588 A JP1833588 A JP 1833588A JP H01195240 A JPH01195240 A JP H01195240A
- Authority
- JP
- Japan
- Prior art keywords
- lining
- refractory
- furnace
- repair
- vacuum degassing
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009849 vacuum degassing Methods 0.000 title claims abstract description 10
- 230000003628 erosive effect Effects 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000011823 monolithic refractory Substances 0.000 abstract description 20
- 239000000463 material Substances 0.000 abstract description 13
- 239000004570 mortar (masonry) Substances 0.000 abstract description 6
- 238000007654 immersion Methods 0.000 description 11
- 239000011819 refractory material Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、真空脱ガス炉の環流管の内張りを効率的に補
修する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for efficiently repairing the lining of a reflux pipe of a vacuum degassing furnace.
（従来の技術）
溶鋼処理に使用されるＲＨ式、ＤＨ式の真空脱ガス炉は
、取鍋からの溶鋼を真空槽に導入あるいは真空槽から排
出するために、浸漬管および環流管からなる流通管を備
えている。この流通管は内部を溶鋼が通過することから
、他の部位に比べて内張りの溶損が著しい。(Prior art) RH type and DH type vacuum degassing furnaces used for molten steel processing have a distribution system consisting of an immersion pipe and a reflux pipe in order to introduce molten steel from a ladle into a vacuum tank or discharge it from the vacuum tank. It has a tube. Because molten steel passes through the inside of this flow pipe, the lining is more susceptible to erosion than other parts.
そこで、流通管を随時補修することが行われている。浸
漬管はフランジにより取り外し、新規なものと交換すれ
ば足りるが、一方の環流管は真空槽と一体化しており、
取り外しがきかないため吹付け、圧入、流し込みなどの
方法で補修している。Therefore, the flow pipes are repaired from time to time. It is sufficient to remove the immersion tube with a flange and replace it with a new one, but the reflux tube on the other hand is integrated with the vacuum tank.
Since they cannot be removed, they are repaired using methods such as spraying, press-fitting, and pouring.
例えば、実開昭５１−８７６０１号公報、特開昭５４−
１０７４０４号公報、特開昭５６−３０５８０号公報に
見られるとおりである。For example, Japanese Utility Model Application Publication No. 51-87601,
This is as seen in Publication No. 107404 and Japanese Unexamined Patent Publication No. 56-30580.
第３図は、還流管補修の従来の一般的な方法を示したも
のである。炉の使用後、環流管（２）にその下方から金
属製中子（８）を挿入し、この中子（８）と内張り（３
）との間に不定形耐火物（７）を流し込みあるいは圧入
によって充填する。FIG. 3 shows a conventional general method for repairing a reflux pipe. After using the furnace, insert the metal core (8) into the reflux pipe (2) from below, and connect this core (8) and the lining (3).
) is filled with the monolithic refractory (7) by pouring or press-fitting.
（発明が解決しようとする問題点）
吹付け、流し込み、圧入などの従来の補修方法は、いず
れも補修材として不定形耐火物を主体としている。しか
し、不定形耐火物は緻密性に劣るため強度および耐蝕性
が不十分である。(Problems to be Solved by the Invention) Conventional repair methods such as spraying, pouring, and press-fitting all mainly use monolithic refractories as repair materials. However, monolithic refractories are inferior in density and therefore have insufficient strength and corrosion resistance.
また、不定形耐火物は強度付与のためにアルミナセメン
ト、ピッチなどの結合剤を多量に添加しているが、アル
ミナセメントの添加では養生および乾燥を経て硬化する
までに長時間を要し、補修に時間がかかり、炉の稼動率
が大幅に低下する。In addition, large amounts of binders such as alumina cement and pitch are added to monolithic refractories to give them strength, but adding alumina cement requires a long time to harden through curing and drying, making it difficult to repair. This takes time, and the operating rate of the furnace decreases significantly.
ピッチを添加したものは、それが炭化して強度を発現す
るまでに時間を要すると共に、ピッチからの発煙で作業
環境面からも好ましくない。Products to which pitch is added require time for the pitch to carbonize and develop strength, and the pitch emits smoke, which is unfavorable in terms of the working environment.
さらに、浸漬管を交換のために取り外した際、浸漬管の
内張りに溶着した環流管下段部の補修材が大きく剥ぎ取
られるという問題がある。これも補修材が強度に劣る不
定形耐火物であることが原因している。Furthermore, when the immersion tube is removed for replacement, there is a problem in that a large portion of the repair material on the lower part of the reflux tube, which is welded to the lining of the immersion tube, is peeled off. This is also due to the fact that the repair material is a monolithic refractory with poor strength.
そこで、例えば特開昭５３−８０４０８号公報のように
、円筒状耐火物を挿入して補修することが提案されてい
るが、第３図にも見られる通り、内張りの溶損部は凹凸
であり、肉厚の円筒状耐火物を挿入することができない
。したがって、結局は内張りと円筒状耐火物との間に多
量の不定形耐火物を充填しなければならず、問題を根本
的に解決するには至ってはいない。Therefore, it has been proposed, for example, to insert a cylindrical refractory material for repair, as in JP-A-53-80408, but as can be seen in Figure 3, the eroded part of the lining is uneven. Therefore, it is not possible to insert thick cylindrical refractories. Therefore, in the end, a large amount of monolithic refractory must be filled between the lining and the cylindrical refractory, and the problem has not been fundamentally solved.
（問題点を解決するための手段）
本発明は、環流管を補修する際の上記従来の問題を解決
することを目的としている。本発明の要旨を実施例に対
応する第１図、第２図を用いて説明すると、環流管（２
）を備えた真空脱ガス炉の使用後、前記環流管（２）の
内張り（３）の内周面を一定の厚さまで除去して該内周
面をほぼ平滑化し、その後、溶損および前記の除去で損
失した寸法にほぼ相当する肉厚の円筒状耐火物（６）を
還流管（２）にその下方から挿入すると共に、前記の内
張り（３）と円筒状耐火物（６）との間に不定形耐火物
（７）を介在させることを特徴とした真空脱ガス炉環流
管の補修方法である。(Means for Solving the Problems) The present invention aims to solve the above-mentioned conventional problems when repairing a reflux pipe. To explain the gist of the present invention using FIGS. 1 and 2 corresponding to the embodiments, the reflux tube (2
) After using a vacuum degassing furnace equipped with A cylindrical refractory (6) with a wall thickness approximately corresponding to the size lost due to the removal of the lining (3) is inserted into the reflux pipe (2) from below, and This is a method for repairing a vacuum degassing furnace reflux tube, which is characterized by interposing a monolithic refractory (7) between them.
（作用）
本発明によると、円筒状耐火物（６）を挿入する際、予
め内張り（３）の内周面を一定の厚さまで除去したこと
で、肉厚の大きな円筒状耐火物（６）の挿入が可能とな
り、その分、不定形耐火物（７）の層厚みを小さくする
ことができる。(Function) According to the present invention, when inserting the cylindrical refractory (6), by removing the inner circumferential surface of the lining (3) to a certain thickness in advance, the cylindrical refractory (6) with a large wall thickness is removed. can be inserted, and the layer thickness of the monolithic refractory (7) can be reduced accordingly.
炉の使用後は、内張り表面に地金、スラグが付着してい
るが、これを除去してからの補修のため内張りに対して
直接、補修材を接着することができ、しかも補修組織に
地金、スラグといった低融点物質が介在しない。After the furnace has been used, bare metal and slag adhere to the surface of the lining, but after removing this, the repair material can be bonded directly to the lining, and the repair material does not adhere to the surface of the lining. There is no intervening low melting point substance such as gold or slag.
（実施例） 以下、本発明の実施例を図面を参照しながら説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
本発明はこの実施例に限定されるものでない。The invention is not limited to this example.
第１図の（Ａ）および（Ｂ）は、本発明の実施例の方法
を順に示したものである。まず、第１図（Ａ）において
、（１）は真空槽、（２）は環流管、（３）は内張りで
ある。図は真空脱ガス炉の下端部の縦断面図であり、炉
の使用後、環流管（２）を補修するため、浸漬管（図示
せず）はフランジ（４）より取−り外している。FIGS. 1A and 1B sequentially illustrate a method according to an embodiment of the present invention. First, in FIG. 1(A), (1) is a vacuum chamber, (2) is a reflux tube, and (3) is a lining. The figure is a vertical cross-sectional view of the lower end of the vacuum degassing furnace. After the furnace is used, the immersion tube (not shown) is removed from the flange (4) in order to repair the reflux tube (2). .
点線で示すように、炉の使用後は内張り（３）の内周面
は凹凸になっている。また、下部に比べて上部の方が大
きく溶損されているが、これは環流管（２）内での溶鋼
流が上方で乱流するためと思われる。As shown by the dotted line, the inner peripheral surface of the lining (3) is uneven after the furnace is used. Furthermore, the upper part was more severely damaged than the lower part, but this seems to be because the molten steel flow in the reflux pipe (2) is turbulent in the upper part.
本実施例ではまず、内張り（３）を一定の厚さまで切削
除去する。この切削方法は種々の方法が考えられ、何等
限定するものではないが、切削後の内周面の平滑度、作
業の迅速性、容易性などから、切削装置（５）として図
に示すようにポーリングマシーンを用いるのが好ましい
。ポーリングマシーンは市販品で得られ、ビットの径も
種々のものがそろえられている。In this example, first, the lining (3) is cut and removed to a certain thickness. Various methods can be considered for this cutting method, and there are no limitations in any way, but from the viewpoint of the smoothness of the inner circumferential surface after cutting, the speed and ease of the work, etc., the cutting device (5) shown in the figure is used. Preferably, a polling machine is used. Polling machines are commercially available and come in a variety of bit diameters.
第１図（Ａ）のように、内張り（３）の内周面を除去し
た後は、溶損および前記除去で損失した寸法にほぼ相当
する肉厚の円筒状耐火物（６）を環流管（２）の下方か
ら挿入する。第１図（Ｂ）は円筒状耐火物（６）を挿入
した後の状態を示すものである。As shown in Fig. 1 (A), after removing the inner circumferential surface of the lining (3), a cylindrical refractory (6) with a wall thickness approximately corresponding to the dimension lost due to erosion and removal is installed in the reflux pipe. (2) Insert from below. FIG. 1(B) shows the state after inserting the cylindrical refractory (6).
ここで補修材として使用する円筒状耐火物（６）は、例
えばプレス成形した焼成品または不焼成品とする。全体
が一体物でもよいし、分割品をモルタルなどで接着した
ものでもよい。また、鋳込み成形したいわゆるプレキャ
スト品でもよい。形状は、環流管（２）内への挿入を容
易にするため、外径が上方に向って小さくなるように、
外周の高さ方向にテーパーを設けておくことが好ましい
。The cylindrical refractory (6) used here as a repair material is, for example, a press-molded fired product or an unfired product. The whole may be one piece, or it may be divided into pieces glued together with mortar or the like. Alternatively, a so-called precast product formed by casting may be used. The shape is such that the outer diameter decreases upward in order to facilitate insertion into the reflux tube (2).
It is preferable to provide a taper in the height direction of the outer periphery.
内張り（３）と円筒状耐火物（６）との間にはモルタル
などの不定形耐火物（７）を介在させる。その介在方法
は、例えば円筒状耐火物（６）をその外周に不定形耐火
物（７）を塗り付けた状態で環流管（２）内に挿入する
ことで容易に行うことができる。また前記方法に比べて
作業能率が低下するが、不定形耐火物（力の介在を流し
込み、圧入などの方法で行ってもよい。A monolithic refractory (7) such as mortar is interposed between the lining (3) and the cylindrical refractory (6). The intervening method can be easily carried out, for example, by inserting a cylindrical refractory (6) into the reflux pipe (2) with the amorphous refractory (7) coated on its outer periphery. Further, although the work efficiency is lower than that of the above method, it is also possible to use a method such as pouring the monolithic refractory (using force), press-fitting, or the like.
不定形耐火物（７）の層厚さは、特に限定するものでは
ないが、通常は円筒状耐火物（６）の肉厚の３分の１以
下、好ましくは５分の１以下である。The layer thickness of the monolithic refractory (7) is not particularly limited, but is usually one-third or less, preferably one-fifth or less, of the wall thickness of the cylindrical refractory (6).
環流管（２）内への円筒状耐火物（６）の挿入は、リフ
ターなどによる押し上げ、あるいは浸漬管を取付ける際
に浸漬管上に載せておくなど、任意の手段で行うことが
できる。環流管（２）の補修後は浸漬管を接続するので
、円筒状耐火物（６）は内張り（３）への接着が多少不
十分であっても、浸漬管の支持によって脱落することも
ない。The cylindrical refractory (6) can be inserted into the reflux pipe (2) by any means such as pushing it up using a lifter or the like, or placing it on the immersion pipe when installing the immersion pipe. After the reflux pipe (2) is repaired, the immersion pipe is connected, so even if the cylindrical refractory (6) is somewhat insufficiently bonded to the lining (3), it will not fall off due to the support of the immersion pipe. .
第２図の（Ａ）ないしくＤ）は他の実施例である。第２
図（Ａ）は環流管（２）の使用前の内張り構造を示す。(A) to D) in FIG. 2 are other embodiments. Second
Figure (A) shows the lining structure of the reflux pipe (2) before use.
炉の使用後、内張り（３）の内周面を除去し易いように
、予め内張り（３）を厚さ方向に多層にしておく。内層
（３ａ）と外層（３ｂ）との間はモルタルなどで接着す
る。内層（３ａ）と外層（３ｂ）とは高さ方向に互いに
テーパーを設け、内ｊｉＪ！（３ａ）の外径を上方に向
って小さくしてお（と、内層（３ａ）の除去がさらに容
易となる。内層（３ａ）の内張りはレンガ積み、プレキ
ャスト品などによる一体構造のいずれでもよい。After using the furnace, the lining (3) is multi-layered in the thickness direction in advance so that the inner circumferential surface of the lining (3) can be easily removed. The inner layer (3a) and the outer layer (3b) are bonded together using mortar or the like. The inner layer (3a) and the outer layer (3b) are mutually tapered in the height direction, so that the inner layer (3a) and the outer layer (3b) are mutually tapered in the height direction. If the outer diameter of (3a) is made smaller upwards, the inner layer (3a) can be removed more easily.The lining of the inner layer (3a) may be made of brickwork, a precast product, etc. .
第２図（Ｂ）は、炉の使用後の溶損状況を示す。FIG. 2(B) shows the state of erosion after the furnace has been used.
補修においては第２図（Ｃ）の通り、まず内層（３ａ）
を除去する。内層（３ａ）を図のように下方へ抜き出す
のが最も効率的であるが、これに限らず、ピッカーなど
で破壊除去してもよい。When repairing, first repair the inner layer (3a) as shown in Figure 2 (C).
remove. Although it is most efficient to extract the inner layer (3a) downward as shown in the figure, the present invention is not limited to this, and the inner layer (3a) may be removed by destruction using a picker or the like.
ついで、第２図（Ｄ）のように、補修材としての円筒状
耐火物（６）を環流管（２）内にその下方から挿入する
。円筒状耐火物（６）は、上方の外径を小さくしたテー
パーを設けると、挿入が容易となる。この円筒状耐火物
（６）は、プレス成形した焼成品または不焼成品、ある
いはプレキャスト品のいずれでもよいこと、内張り（３
）との間にモルタルなどの不定形耐火物（７）を介在す
ることなどは、前記実施例と同様である。Then, as shown in FIG. 2(D), a cylindrical refractory (6) as a repair material is inserted into the reflux pipe (2) from below. The cylindrical refractory (6) can be easily inserted by providing a taper with a smaller outer diameter at the top. This cylindrical refractory (6) may be a press-formed fired product, an unfired product, or a precast product, and the inner lining (3
) is the same as in the previous embodiment in that a monolithic refractory (7) such as mortar is interposed between the two.
また、ポーリングマシーンで内張り（３）の内周面を除
去する場合でも、第２図のように内張り（３）を予め内
層（３ａ）と外層（３ｂ）の多層構造にしておき、内周
面除去の際にはポーリングマシーンのビットを内層（３
ａ）と外層（３ｂ）との層界に押し当て行うと、切削除
去が容易となる。In addition, even when removing the inner peripheral surface of the lining (3) using a polling machine, the inner lining (3) should be made into a multilayer structure of an inner layer (3a) and an outer layer (3b) in advance as shown in Figure 2, and the inner peripheral surface During removal, the bits of the polling machine are removed from the inner layer (3
By pressing against the layer boundary between a) and the outer layer (3b), cutting and removal becomes easy.
このように、第２図に示す実施例では環流管（２）の内
張り（３）を厚さ方向に予め多層にしておくことで、内
張り（３）の内周面の除去が容易となり、本発明の補修
方法をさらに効率的なものとする。In this way, in the embodiment shown in FIG. 2, by making the lining (3) of the reflux pipe (2) multi-layered in the thickness direction in advance, the inner circumferential surface of the lining (3) can be easily removed, and the actual To make the repair method of the invention more efficient.
（発明の効果）
本発明の補修方法は以上の構成よりなり、その効果を列
挙すれば次す通りである。(Effects of the Invention) The repair method of the present invention has the above configuration, and its effects are enumerated as follows.
（１）本発明は不定形耐火物を使用してもその層厚さが
小さいため炉熱を受けると直ちに硬化し、補修材として
不定形耐火物を主体とした従来方法のように養生・乾燥
に時間を要することもないから、補修時間が大幅に短縮
され、炉の稼動率が向上する。(1) Even if monolithic refractories are used in the present invention, their layer thickness is small, so they harden immediately when exposed to furnace heat, and cannot be cured and dried as repair materials like conventional methods that mainly use monolithic refractories. Since it does not take much time to repair, repair time is significantly shortened and furnace operation rate is improved.
（２）仮にピッチなどの結合剤を添加した不定形耐火物
を使用しても、その使用量が少なく、発煙の問題が殆ど
ない。(2) Even if a monolithic refractory to which a binder such as pitch is added is used, the amount used is small and there is almost no problem with smoke generation.
（３）補修材として肉厚の定形耐火物の使用が可能とな
る。定形耐火物は不定形耐火物に比べて緻密質のものが
得られるから強度および耐蝕性に優れ、耐用寿命が格段
に向上する。(3) Thick shaped refractories can be used as repair materials. Shaped refractories are denser than monolithic refractories, so they are superior in strength and corrosion resistance, and their service life is significantly improved.
（４）補修層の大部分は強度の大きな定形耐火物で占め
られるから、浸漬管を取り外した際に環流管下部の補修
層が浸漬管との溶着で剥ぎ取られるのを ゛防止できる
。(4) Since most of the repair layer is made up of high-strength shaped refractories, it is possible to prevent the repair layer at the bottom of the reflux tube from being peeled off due to welding with the immersion tube when the immersion tube is removed.
（５）炉の使用後は内張り表面に地金、スラグが付着し
ている。地金、スラグは低融点物質であるから、補修材
の接着強度および耐蝕性を低下させる。これに対し本発
明は、地金、スラグが付着した内周面を除去してからの
補修のため、内張りに対する補修材の接着力が増し、し
かも補修材の耐蝕性が向上する。(5) After using the furnace, metal and slag adhere to the lining surface. Since the base metal and slag have low melting points, they reduce the adhesive strength and corrosion resistance of the repair material. In contrast, in the present invention, since the inner circumferential surface to which base metal and slag have adhered is removed before repair, the adhesion of the repair material to the lining is increased, and the corrosion resistance of the repair material is improved.
実際に２５０ｔのＲＨ式真空脱ガス炉の還流管補修に本
発明方法を使用した。この場合の環流管内張りの使用前
の全厚さは２５０圓であった。炉の使用後、内張りの内
周面を除去した。この除去で残存した内張りの厚さは５
０ｎｕｎであった。ついで、厚さ１９０Ｍ、高さは環流
管の内張りに合せて８５０ ｎｒｍに成形した円筒状耐
火物を、その外周にモルタルを塗り付けた状態で環流管
に挿入し、補修を完了した。後は常法どおり浸漬管を取
付、炉を稼動した。The method of the present invention was actually used to repair the reflux tube of a 250-ton RH type vacuum degassing furnace. The total thickness of the reflux tube lining before use in this case was 250 mm. After using the furnace, the inner peripheral surface of the lining was removed. The thickness of the lining that remained after this removal was 5
It was 0nun. Next, a cylindrical refractory molded to a thickness of 190 m and a height of 850 nrm to match the lining of the reflux pipe was inserted into the reflux pipe with mortar applied to its outer periphery to complete the repair. After that, I installed the dip tube as usual and started operating the furnace.
その結果、定形耐火物主体による補修のため、補修後の
耐用性は、従来方法が３〜５チヤージに対し本発明方法
は４０〜５０チヤージであった。不定形耐火物主体によ
る従来方法のように養生・乾燥を殆ど必要としないから
、補修に要した時間は第１図の実施例タイプでは従来方
法の２分の１以下、第２図の実施例タイプでは、さらに
、第１図の実施例タイプの３分の２以下であった。As a result, since the repair mainly consisted of shaped refractories, the durability after repair was 40 to 50 charges in the method of the present invention, compared to 3 to 5 charges in the conventional method. Unlike conventional methods that mainly use monolithic refractories, there is almost no need for curing and drying, so the time required for repair is less than half that of the conventional method for the example type shown in Figure 1, and for the example shown in Figure 2. In terms of type, it was also less than two-thirds of the example type shown in FIG.
以上の通り、本発明方法による還流管補修によれば、補
修時間の短縮、補修後の耐用寿命の延長などにより、補
修費の低減、補修工数の縮減、炉の稼動率向上などその
効果はきわめて大きい。As described above, the return pipe repair method according to the present invention has extremely effective effects such as reducing repair costs, reducing repair man-hours, and improving furnace operation rate by shortening repair time and extending the service life after repair. big.
図はいずれも還流管補修の状況を示す要部断面図である
。第１図の（Ａ）ないしくＢ）は本発明実施例、第２図
の（Ａ）ないしくＤ）は他の実施例、第３図は従来方法
を示す。
■・・・真空槽、３ｂ・・・外層、７・・・不定形耐火
物２・・・環流管、４・・・フランジ、
３・・・内張り、５・・・切削装置、All figures are cross-sectional views of essential parts showing the status of reflux pipe repair. 1A to 1B show an embodiment of the present invention, FIGS. 2A to 2D show other embodiments, and FIG. 3 shows a conventional method. ■... Vacuum chamber, 3b... Outer layer, 7... Monolithic refractory 2... Circulation pipe, 4... Flange, 3... Lining, 5... Cutting device,
Claims (1)
流管（２）の内張り（３）の内周面を一定の厚さまで除
去して該内周面をほぼ平滑化し、その後、溶損および前
記の除去で損失した寸法にほぼ相当する肉厚の円筒状耐
火物（６）を環流管（２）にその下方から挿入すると共
に、前記の内張り（３）と円筒状耐火物（６）との間に
不定形耐火物（７）を介在させることを特徴した真空脱
ガス炉環流管の補修方法。After using the vacuum degassing furnace equipped with the reflux tube (2), the inner peripheral surface of the lining (3) of the reflux tube (2) is removed to a certain thickness to make the inner peripheral surface almost smooth, and then, A cylindrical refractory (6) with a wall thickness approximately corresponding to the size lost due to erosion and removal as described above is inserted into the reflux pipe (2) from below, and the lining (3) and the cylindrical refractory ( 6) A method for repairing a vacuum degassing furnace reflux pipe, comprising interposing an amorphous refractory (7) between the reflux pipe and the reflux pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63018335A JPH0762168B2 (en) | 1988-01-28 | 1988-01-28 | Vacuum degassing furnace recirculation pipe repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63018335A JPH0762168B2 (en) | 1988-01-28 | 1988-01-28 | Vacuum degassing furnace recirculation pipe repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01195240A true JPH01195240A (en) | 1989-08-07 |
| JPH0762168B2 JPH0762168B2 (en) | 1995-07-05 |
Family
ID=11968776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63018335A Expired - Lifetime JPH0762168B2 (en) | 1988-01-28 | 1988-01-28 | Vacuum degassing furnace recirculation pipe repair method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762168B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514145U (en) * | 1991-02-18 | 1993-02-23 | 住友金属工業株式会社 | Ascending pipe for vacuum degassing equipment |
| US5529729A (en) * | 1992-01-23 | 1996-06-25 | Intocast Gmbh Feuerfestprodukte Und Giesshilfsmittel | Process for producing the refractory lining of a casting ladle |
| WO2010054853A2 (en) | 2008-11-17 | 2010-05-20 | Stopinc Aktiengesellschaft | Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal |
| JP2017088982A (en) * | 2015-11-16 | 2017-05-25 | Ｊｆｅスチール株式会社 | Reflux tube of vacuum degasser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885A (en) * | 1981-06-23 | 1983-01-05 | 新日本製鐵株式会社 | Method of construction of removal of sleeve brick of molten metal encasing vessel |
| JPS58158489A (en) * | 1982-03-15 | 1983-09-20 | 新日本製鐵株式会社 | Exchanger for sleeve brick of molten-metal receiving vessel |
-
1988
- 1988-01-28 JP JP63018335A patent/JPH0762168B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885A (en) * | 1981-06-23 | 1983-01-05 | 新日本製鐵株式会社 | Method of construction of removal of sleeve brick of molten metal encasing vessel |
| JPS58158489A (en) * | 1982-03-15 | 1983-09-20 | 新日本製鐵株式会社 | Exchanger for sleeve brick of molten-metal receiving vessel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514145U (en) * | 1991-02-18 | 1993-02-23 | 住友金属工業株式会社 | Ascending pipe for vacuum degassing equipment |
| US5529729A (en) * | 1992-01-23 | 1996-06-25 | Intocast Gmbh Feuerfestprodukte Und Giesshilfsmittel | Process for producing the refractory lining of a casting ladle |
| WO2010054853A2 (en) | 2008-11-17 | 2010-05-20 | Stopinc Aktiengesellschaft | Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal |
| WO2010054853A3 (en) * | 2008-11-17 | 2010-07-08 | Stopinc Aktiengesellschaft | Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal |
| JP2017088982A (en) * | 2015-11-16 | 2017-05-25 | Ｊｆｅスチール株式会社 | Reflux tube of vacuum degasser |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0762168B2 (en) | 1995-07-05 |
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