JPS60149888A - Method of repairing lining of molten-metal treating vessel - Google Patents
Method of repairing lining of molten-metal treating vesselInfo
- Publication number
- JPS60149888A JPS60149888A JP531084A JP531084A JPS60149888A JP S60149888 A JPS60149888 A JP S60149888A JP 531084 A JP531084 A JP 531084A JP 531084 A JP531084 A JP 531084A JP S60149888 A JPS60149888 A JP S60149888A
- Authority
- JP
- Japan
- Prior art keywords
- lining
- molten
- press
- steel
- repairing
- 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
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業７にの利用分野〕
本発明は、溶融金属処理容器の内張り部位、とくにＲＨ
、Ｄ Ｈ式真空脱ガス装置の内張り部位のうしてもっと
も損傷の著しい／８鋼吸引部の内張り補修方法に関する
ものである。[Detailed Description of the Invention] [Field of Application in Industry 7] The present invention is directed to the lining of a molten metal processing container, especially the RH
, DH relates to a method for repairing the lining of the /8 steel suction section, which is the most severely damaged lining section of a H-type vacuum degasser.
製鉄窯かの内張りには、通常耐火れんが、耐火キャスタ
ブルによるライニングが施されている。Iron kilns are usually lined with refractory brick or refractory castable.
内張り祠は、溶銑、溶鋼の溶融金属、スラグ、高温ダス
ト等によって損傷される。損傷部位は、含水牛ヤスタプ
ルによる湿式吹付け、圧入等によって補修され、遂には
、内張り月を解体し、再構築される。The lined shrine is damaged by molten metal such as hot metal and molten steel, slag, and high temperature dust. The damaged area was repaired by wet spraying and press-fitting using water-containing cow yasta pull, and finally the inner lining was dismantled and rebuilt.
近年、これらの内張りｔ員傷部位の補修法として、高温
燃焼火焔内に耐火粉末を飛行させ、溶射耐火粉末を吹イ
」ける溶剤補修法の適用が活発である。In recent years, as a method for repairing these damaged parts of the lining, a solvent repair method in which refractory powder is flown into a high-temperature combustion flame and the sprayed refractory powder is blown out has been actively applied.
ところでＲＨ式あるいはＤＨ式真空脱ガス装置の内張り
部位のうちでもっとも損傷の著しい部位は、溶鋼吸引部
である。これらの部位は、通常マグネシア・クロムれん
がで内張すされているが、／ｇ Ｓｉ４の吸引、還流に
よって著しく損傷され、操業回数が多くなると局部的に
内張りれんがが脱落する。局部的な溶損のみで、内張り
れんが・（再構築すると、炉材原単位、原車価が高くな
るため、円筒状の鋼板枠を溶鋼吸引部に設置し、内張り
れんがと鋼板枠の空間に、含水耐火物を圧入する補修が
採用されている。この種の方法としては、特開昭５４−
１０７４０４号公報（昭和５４年８月２３Ｉ」発行）に
記載の溶融金属流動部の側壁補修方法、あるいは特開昭
５７−５１２２５号公報（昭和５７年３月２６日発行）
に記載の真空脱ガス装置上昇管の補修方法がある。By the way, of the lining parts of an RH type or DH type vacuum degassing apparatus, the most severely damaged part is the molten steel suction part. These parts are usually lined with magnesia chromium bricks, but they are severely damaged by the suction and reflux of /g Si4, and as the number of operations increases, the lining bricks fall off locally. With only local melting damage, the lining brick (reconstruction will increase the unit cost of furnace materials and the original vehicle price, so a cylindrical steel plate frame is installed in the molten steel suction section, and the space between the lining brick and the steel plate frame is , repair by press-fitting water-containing refractories has been adopted.As a method of this type,
The method for repairing the side wall of a molten metal flowing section described in Publication No. 107404 (published August 23, 1978), or JP-A-57-51225 (published March 26, 1982)
There is a method for repairing a riser pipe of a vacuum degasser described in .
しかしながら、これらの方法では、溶融金属処理容器の
局部損傷部位には、スラグ、地金が深（浸透しているた
め、含水耐火物で埋め込まれても、補修直後は内張り機
能を果たずが、溶損が進行するとスラグ、地金が軟化溶
融し、含水耐大物は剥離損傷するという問題がある。However, with these methods, slag and metal have penetrated deeply into the locally damaged area of the molten metal processing container, so even if it is filled with hydrated refractory, it will not function as a lining immediately after repair. As the melting damage progresses, the slag and base metal soften and melt, and large, water-containing materials suffer from peeling damage.
本発明は、このような従来の問題を解消し、局部的な損
傷部位にりＪして信頼性の高い補修方法を提供すること
を目的とするものである。It is an object of the present invention to solve these conventional problems and provide a highly reliable repair method for localized damaged areas.
本発明は、局部損傷部位に浸入しているスラグ。 The present invention deals with slag that has penetrated into localized damaged areas.
地金等を１ＩＩＩ温の溶射火焔によって／８流除去させ
、付着物を溶流除去した部位に、溶融耐火粉末を局部的
に溶流埋め込み、イχ］着物が存在していた空間に耐火
性のｉｌ’ｌｉい溶射層をイ（］着させ、さらにキャス
タブル圧入によって内張り層を構築することを特徴とす
るものである。The base metal, etc. is removed by a thermal spray flame of 1III temperature, and the molten refractory powder is locally embedded in the area where the deposits were removed, and the space where the kimono was present is made fireproof. The method is characterized in that a thin thermal sprayed layer is deposited, and a lining layer is further constructed by castable press-fitting.
以下、本発明を図面に基づいて具体的に説明する。 Hereinafter, the present invention will be specifically explained based on the drawings.
第１図はＲＨ式真空脱ガス装置の断面図である。FIG. 1 is a sectional view of the RH type vacuum degassing apparatus.
脱ガス槽（１０）は上部槽（１１） 、下部槽（１２）
に大別され、下部の還流管部（１２Ａ）には浸漬管（１
２Ｂ）が接続されている。なお、前述した／８鋼吸引部
とは還流管部（１２Ａ）と浸漬管（１２Ｂ）を指してい
る。（１３）は取鍋である。The degassing tank (10) has an upper tank (11) and a lower tank (12).
The reflux pipe section (12A) at the bottom has a dipping pipe (1
2B) is connected. Note that the above-mentioned /8 steel suction section refers to the reflux pipe section (12A) and the immersion pipe (12B). (13) is a ladle.
第２図は、中央の一点鎖線より右側は新炉のときの状態
で、左側は下部槽（１２）の使用が３００ｃｈ時点の溶
損状態を示す断面図、第３図は第２図の１−１線におけ
る横断面図である。還流管部のれんが（１１は著しく損
傷され、部分的にＩｂ、り落ちか生じている（斜線部）
。溶鋼処理後、当該部位には第４図の（２）で示すよう
に／８鋼が４１１着している。In Figure 2, the right side of the center dashed line shows the condition when the new furnace was used, the left side is a cross-sectional view showing the melted state of the lower tank (12) at the 300th channel of use, and Figure 3 is the 1 in Figure 2. It is a cross-sectional view taken along the line -1. Bricks in the reflux pipe section (11 are severely damaged and partially Ib or fallen off (shaded area)
. After the molten steel treatment, 411 pieces of /8 steel were deposited at the site, as shown in (2) in FIG.
このように局部損傷を受けている部分の補修法としては
、従来より、第４図に示す圧入法によって補修を行って
いる。この場合局部溶損部には地金付着があり、地金付
着層を内在した状態で内張り層が形成される。この状態
で操業が実施されると内張り層力９容損されるに従って
、地金付着層（２）が軟化溶融し、圧入内張り祠（３）
が早期に脱落損耗される。なお第４図中（４）は圧入内
張り刊を圧入場−るための注入管、（６）は型枠である
。Conventionally, as a method for repairing such locally damaged parts, a press-fitting method shown in FIG. 4 has been used. In this case, there is base metal adhesion in the localized melted portion, and the lining layer is formed with the base metal adhesion layer included. If operation is carried out in this state, as the lining layer force is lost, the base metal adhesion layer (2) will soften and melt, and the press-fit lining chapel (3) will be softened and melted.
will fall off and be worn out early. In Fig. 4, (4) is an injection pipe for press-fitting the press-fit lining, and (6) is a formwork.
本発明では、第５図の（ａ）に示すように、まず溶射バ
ーナー（５）によって地金付着層を溶流除去する。In the present invention, as shown in FIG. 5(a), the base metal adhesion layer is first removed by a thermal spray burner (5).
溶流除去後、溶射火焔中に１ＩｉＪ火１５）末を飛行さ
ゼ、局部ＴＭ Ｉｇ部位に集中的に溶射肉盛りする。ノ
＼−ナー（５）の操作は、固定した状態で行なし）、溶
融耐火粉末を過溶融状態にせしめ、局部損傷部１■部ま
で、火焔θＸεによって溶流充填する。第５図（ｂｌに
おりるＡ部はその充填された溶射層である。その後、進
言の圧入方法と同様に型枠（６）を内張りれんがの内側
に設置し、その空間に注入的（４）より含水耐火物を圧
入して内張りを形成さ−Ｕる（第５図（Ｃ））。After removing the melt, 1IiJ powder is flown into the thermal spray flame to intensively spray overlay on the local TM Ig site. (The operation of the nozzle (5) is not carried out in a fixed state), the molten refractory powder is brought into a super-molten state, and the melt is filled with the flame θXε up to 1 part of the locally damaged area. Part A in Figure 5 (bl) is the filled sprayed layer. After that, the formwork (6) is installed inside the lining brick in the same way as the press-in method of Shingon, and the injection molding (4) is placed in that space. ), the lining is formed by press-fitting the water-containing refractory (Fig. 5(C)).
次に実施例について従来法と比較して説明する。 Next, an example will be described in comparison with a conventional method.
３００１−ン炉容のＲＨ式真空脱ガス装置におむ１て、
／８鋼吸引部は、一般壁面より損耗が著しく、特に浸漬
管の耐用は１６０ｃｈ程度であり、溶鋼上昇管で５０ｃ
ｈ使用した後、下降管で５０ｃｈ使用され、１００ｃｈ
毎に交換される。還流管部は通富４００ｃｈ程度の耐用
であり、４００ｃｈ毎に内張りが再構築されている。In the RH type vacuum degassing equipment with a 3001-inch furnace volume,
/8 The steel suction part has more wear and tear than the general wall surface, especially the immersion pipe has a service life of about 160ch, and the molten steel riser pipe has a lifespan of about 50cm.
After using h, 50ch is used in the downcomer, and 100ch is used.
exchanged every time. The reflux pipe section has a service life of about 400 channels, and the lining is rebuilt every 400 channels.
３００ｃｈ時点で還流管部のれんがが一部脱落した。At the 300th channel, some of the bricks in the reflux pipe part fell off.
この状態で操業を継続すると、他のれんがの脱落を進行
させるばかりでなく、局部損傷部位の侵食進行によって
鉄皮貫通を引き起ごずことになる。If the operation continues in this state, not only will other bricks fall off, but the locally damaged areas will continue to erode, causing penetration of the steel skin.
従来方法では、鋼製の枠を還流管部に設置し、Ａ部２０
３＝９０％、 ５ｉ０２ ＝１０％の耐火キャスクプル
を水分１５％を加えて圧入する。約５肋間の産生時間を
経て操業に入る。補修後、３０ｃｌ＋時点で、局部損傷
部位に存在していた地金の軟化溶融層Ｉ３の進行が鉄皮
にまで至り、溶鋼処理中に真空槽内の／８鋼が漏れた（
第６図）。In the conventional method, a steel frame is installed in the reflux pipe section, and the A section 20
3 = 90%, 5i02 = 10% refractory cask pull with 15% moisture added. Operation begins after approximately 5 intercostals have been produced. After repair, at 30cl+, the softened molten layer I3 of the base metal that existed in the locally damaged area had progressed to the steel skin, and /8 steel in the vacuum chamber leaked during molten steel processing (
Figure 6).
次に本発明の補修実施例について説明する。Next, a repair embodiment of the present invention will be described.
３２０ｃｈ時点で還流管部のれんがが３枚脱落したとき
の実施例について説明する。Ｌ Ｐ Ｇ −４ＯＮ ｍ
／ｌｌｒ、 ０２ ＝２００ Ｎｒｒｒ／ｌｌｒの溶射
火焔によつζ、脱落部位の付着物を約１０分間要して溶
流除去した。An example in which three bricks of the reflux tube part fall off at the 320th channel will be described. LPG-4ONm
/llr, 02 = 200 Nrrr/llr, and the deposits at the fallen site were removed by a thermal spray flame for about 10 minutes.
その後、０．２Ｎ−以下の粒度を有するＭｇ０＝５０％
、Ａｌ１ ｏａ ＝５０％の耐火材粉末を１００ｋｇ／
Ｉ（ｒの供給速度で、脱落部（長さ３００×高さ２５０
ｍｍ）に溶射した。バーナーは損傷部３個所の位置で固
定し、１個所約６分間溶射し、３回繰り返した。最初の
３分間粉末を供給し、残り３分間は溶融耐火粉末を溶流
埋め込むために加熱した。Then Mg0=50% with particle size below 0.2N-
, 100 kg/Al1 oa = 50% refractory powder
At a feed rate of I(r), the falling part (length 300 x height 250
mm). The burner was fixed at three damaged locations, and each location was sprayed for about 6 minutes, repeating three times. The powder was fed for the first 3 minutes, and the remaining 3 minutes were heated to flow embed the molten refractory powder.
損傷部が広いために、溶射後、鋼板枠を還流管内に設置
し、ｌ１１２ｏ３＝９０％、Ｓｉ Ｏ２＝ １０％の耐
火キャスタブルを水分１５％を加えて圧入し、約５時間
養生し、操業に入った。当下部槽は、その後５００ｃｂ
まで使用し、本発明による補修の効果を確認した。下表
はその効果を示すものである。Because the damaged area was large, after thermal spraying, a steel plate frame was installed inside the return pipe, and refractory castable with l112o3 = 90% and SiO2 = 10% was press-fitted with 15% moisture added, and after curing for about 5 hours, operation was resumed. Has entered. This lower tank is then 500cb
The effectiveness of the repair according to the present invention was confirmed. The table below shows the effect.
表
〔発明の効果〕
上述したように本発明の補修方法によれば、内張り材を
冷却することなく接着性の高い緻密質施工体を保ち、耐
用ｃｈが長くて内張りの信頼性を高めることができると
いう効果を奏するものである。Table [Effects of the Invention] As described above, according to the repair method of the present invention, a dense construction body with high adhesiveness can be maintained without cooling the lining material, and the durability of the lining can be increased due to the long service life channel. This has the effect of making it possible.
第１図はＲＨ式真空脱ガス装置の構造を示ずＩｌｉ面図
、第２図は第１図の装置の新炉のときの状態と／８損時
の状態とを比較して示す縦断面図、第３図は第２図のＩ
−１線における横断面図、第４図は従来法による補修方
法を示す断面図、第５図は本発明による補修方法を示す
説明図、第６図は従来法による／８鋼の漏れを説明する
断面図である。
（１）二速流管れんが
（２）：地金付着層
（３）：圧入内張り祠
（４）：圧入管
＋５１ ： ／８射バーナー
（６）：型枠
（１０） ：脱ガス槽
（ＩＩ） ：上部槽
（１２） ：下部槽
（１２Ａ）：還流管部
（１２１３） ：浸漬管
（１３） ：取鍋
Ａ：溶射層
Ｂ：地金の軟化溶融層
第 ２ 図
箔４図 第６図
↑
第５図
（（１） （ｂ） （Ｃ）Figure 1 is a side view showing the structure of the RH type vacuum degassing equipment, and Figure 2 is a vertical cross-section showing the equipment in Figure 1 in a new furnace state and in a /8 loss state. Figure 3 is I of Figure 2.
-1 line cross-sectional view, Figure 4 is a cross-sectional view showing the repair method using the conventional method, Figure 5 is an explanatory diagram showing the repair method according to the present invention, and Figure 6 is an explanation of leakage of /8 steel using the conventional method. FIG. (1) Two-speed flow pipe brick (2): Metal adhesion layer (3): Press-fit lining shrine (4): Press-fit pipe +51: /8 burner (6): Formwork (10): Degassing tank (II) ) : Upper tank (12) : Lower tank (12A) : Reflux pipe section (1213) : Immersion pipe (13) : Ladle A: Thermal spray layer B: Softened molten layer of base metal Figure 2 Figure 4 Foil Figure 6 ↑ Figure 5 ((1) (b) (C)
Claims (1)
ーナーの火焔によって溶流除去した後、溶射バーナーに
より血１火粉末を落射吹付けして損傷部の四部に充填し
、しかる後型枠を用いてキャスタブル１ｔ）ｉ＋火物を
圧入することを特徴とする溶融金属処理容器の内張り補
修方法。1. After removing deposits such as slag 1 base metal from the damaged area of the lining with the flame of a thermal spray burner, spray blood 1 spark powder from the thermal spray burner to fill the four parts of the damaged area, and then mold. A method for repairing the lining of a molten metal processing container, comprising press-fitting a castable 1t)i+ fire using a frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP531084A JPS60149888A (en) | 1984-01-14 | 1984-01-14 | Method of repairing lining of molten-metal treating vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP531084A JPS60149888A (en) | 1984-01-14 | 1984-01-14 | Method of repairing lining of molten-metal treating vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60149888A true JPS60149888A (en) | 1985-08-07 |
| JPS622237B2 JPS622237B2 (en) | 1987-01-19 |
Family
ID=11607696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP531084A Granted JPS60149888A (en) | 1984-01-14 | 1984-01-14 | Method of repairing lining of molten-metal treating vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60149888A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02190418A (en) * | 1989-01-19 | 1990-07-26 | Nkk Corp | Method for exchanging degassing vessel |
| JPH02106451U (en) * | 1989-02-07 | 1990-08-23 | ||
| JP2007313539A (en) * | 2006-05-25 | 2007-12-06 | Nippon Steel Corp | Refining vessel repair method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744728A (en) * | 1980-08-27 | 1982-03-13 | Honda Motor Co Ltd | Motor cycle equipped with supercharged engine |
| JPS57166487A (en) * | 1981-04-06 | 1982-10-13 | Kawasaki Steel Co | Flame spraying repair for opening of refining vessel |
| JPS586869A (en) * | 1981-07-02 | 1983-01-14 | Mitsubishi Electric Corp | Control of rewinding of coil material |
-
1984
- 1984-01-14 JP JP531084A patent/JPS60149888A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744728A (en) * | 1980-08-27 | 1982-03-13 | Honda Motor Co Ltd | Motor cycle equipped with supercharged engine |
| JPS57166487A (en) * | 1981-04-06 | 1982-10-13 | Kawasaki Steel Co | Flame spraying repair for opening of refining vessel |
| JPS586869A (en) * | 1981-07-02 | 1983-01-14 | Mitsubishi Electric Corp | Control of rewinding of coil material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02190418A (en) * | 1989-01-19 | 1990-07-26 | Nkk Corp | Method for exchanging degassing vessel |
| JPH02106451U (en) * | 1989-02-07 | 1990-08-23 | ||
| JP2007313539A (en) * | 2006-05-25 | 2007-12-06 | Nippon Steel Corp | Refining vessel repair method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS622237B2 (en) | 1987-01-19 |
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