JP2768785B2 - Method of lining and repair of molten steel pot - Google Patents
Method of lining and repair of molten steel potInfo
- Publication number
- JP2768785B2 JP2768785B2 JP3482290A JP3482290A JP2768785B2 JP 2768785 B2 JP2768785 B2 JP 2768785B2 JP 3482290 A JP3482290 A JP 3482290A JP 3482290 A JP3482290 A JP 3482290A JP 2768785 B2 JP2768785 B2 JP 2768785B2
- Authority
- JP
- Japan
- Prior art keywords
- brick
- molten steel
- steel pot
- slag
- floor
- 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 54
- 239000010959 steel Substances 0.000 title claims description 54
- 238000000034 method Methods 0.000 title claims description 26
- 230000008439 repair process Effects 0.000 title description 32
- 239000011449 brick Substances 0.000 claims description 91
- 239000002893 slag Substances 0.000 claims description 34
- 230000008595 infiltration Effects 0.000 claims description 15
- 238000001764 infiltration Methods 0.000 claims description 15
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000004901 spalling Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 33
- 238000005266 casting Methods 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、転炉で吹錬され出鋼する溶鋼を次工程、例
えば、連続鋳造設備に搬送する前に清浄化の溶鋼処理を
行う為に使用される取鍋、特に溶鋼鍋のライニング方法
及び補修方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a process for cleaning molten steel which is blown and output from a converter in the next step, for example, before being transferred to a continuous casting facility. The present invention relates to a lining method and a repairing method for a ladle, particularly a molten steel ladle used for a ladle.
（従来技術） 取鍋、特に溶鋼鍋は、転炉で吹錬され出鋼する溶鋼を
次工程の、例えば、連続鋳造設備へ搬送する為に使用さ
れているが、その構成は第２図の断面図に示される通
り、溶鋼鍋（10）の底部にスタンプ（11）に囲まれた敷
部煉瓦（12）、側壁には一般壁煉瓦（13）、スラグライ
ン部煉瓦（14）、フリーボード部煉瓦（15）、又底部の
敷部煉瓦（12）の一部には滓を排出する排滓口（16）を
配設した構造が一般的である。(Prior Art) A ladle, especially a molten steel ladle, is used to transport molten steel blown out in a converter and tapped to the next step, for example, to a continuous casting facility. As shown in the cross-sectional view, the floor brick (12) surrounded by the stamp (11) at the bottom of the molten steel pot (10), the general wall brick (13) on the side wall, the slag line brick (14), and the freeboard Generally, a structure is provided in which a drain port (16) for discharging slag is provided in a part brick (15) and a part of the bottom brick (12).
そして、スラグライン部煉瓦（14）及びフリーボード
部煉瓦（15）は、焼成アルミナ煉瓦、不焼成アルミナ煉
瓦、カーボン煉瓦等が主として使用されている。従来、
上記溶鋼鍋は溶鋼を単に搬送する為に使用されている取
鍋とは異なり、最近ではその連続鋳造等の次工程に搬送
される直前において清浄化の為の溶鋼処理が行われてい
る。As the slag line section brick (14) and the free board section brick (15), fired alumina bricks, unfired alumina bricks, carbon bricks and the like are mainly used. Conventionally,
Unlike the ladle used to simply transport molten steel, the molten steel ladle has recently been subjected to a molten steel treatment for cleaning immediately before being transported to the next process such as continuous casting.
この為、溶鋼鍋内壁にライニングされた耐火物への負
荷が大きく、当該耐火物の溶損が著しく、耐用寿命が短
縮されると共に補修の頻度が多く、結果として製鋼原単
価に占める耐火物原単価は無視できぬ程大きくなってい
る。For this reason, the load on the refractory lined on the inner wall of the molten steel pot is large, and the refractory melts significantly, shortening the service life and frequently performing repairs. As a result, the refractory material accounts for the steelmaking unit price. Unit prices are so large that they cannot be ignored.
係る事情に鑑み従来では、溶鋼鍋耐火物の材質を高耐
用性の材料に置換したり、耐火物として使用する煉瓦の
単一長さを長尺化して有効に利用できる煉瓦の厚みを増
し、溶鋼鍋寿命の向上を図るようにしていた。In view of such circumstances, conventionally, replacing the material of the molten steel pot refractory with a highly durable material, increasing the thickness of the brick that can be effectively used by lengthening the single length of the brick used as a refractory, The life of the molten steel pot was improved.
使用中の溶鋼鍋の補修を行う場合には、ZrO2質の不定
形耐火物（流し込み材）を流し込み施工する手段が採用
されていた。When repairing a molten steel ladle in use, a means of pouring in a ZrO 2 quality refractory (cast material) was used.
（発明が解決しようとする課題） 前述の如く、溶鋼鍋寿命の向上を図る手段として行わ
れている従来法では、溶鋼鍋耐火物の材質を高耐用性の
材料に置換したり、耐火物として使用する煉瓦の単一長
さを長尺化して有効に利用できる煉瓦の厚みを増した
り、流し込み施工を行ったりしていたが、これらの手段
では次のような問題が残っている。即ち、溶鋼鍋耐火物
の材質を高耐用性の物に置換する手段においては、使用
する耐火物を高耐用性材料（例えば、電蝕AL2O3、高純
度黒鉛、電蝕MgOを使用した煉瓦）に置換すれば、耐火
物の原単価が上昇し、その寿命が向上したとしても煉瓦
の製造原価が著しく高いことの理由から耐火物原単価が
低減されるとは限らない。(Problems to be Solved by the Invention) As described above, in the conventional method which is performed as a means for improving the life of the molten steel ladle, the material of the refractory of the molten steel ladle is replaced with a highly durable material, or the refractory is used as a refractory. Although the length of a single brick to be used has been lengthened to increase the thickness of a brick that can be effectively used, or casting has been performed, these methods have the following problems. That is, in the means of replacing the material of the refractory in a steel ladle with a highly durable material, the refractory to be used is made of a highly durable material (for example, electrolytic corrosion AL 2 O 3 , high-purity graphite, electrolytic corrosion MgO was used. When the brick is replaced with a brick, the unit price of the refractory increases, and even if the life of the refractory is improved, the unit cost of the refractory is not always reduced because the cost of manufacturing the brick is extremely high.
また、煉瓦の単一長さを長尺化して有効に利用できる
煉瓦の厚みを増加させる手段においては、煉瓦単位の厚
みが増加する関係上溶鋼鍋の重量増加を来し、搬送時、
例えば、クレーンで吊持する場合では使用されるクレー
ンの種類によっては吊持出来ない恐れがある。In addition, in the means for increasing the thickness of a brick that can be effectively used by lengthening the single length of the brick, the weight of the molten steel pot increases due to the increase in the thickness of the brick unit, and during transportation,
For example, when suspended by a crane, it may not be possible to suspend depending on the type of the crane used.
このような事情に鑑み、上述の手段とは異なる手段と
して、溶鋼鍋にライニングされる耐火物を定形煉瓦に変
えて不定形耐火物を流し込み材として用いる手段が最近
では採用され、耐火物原単価の低減を図っている。In view of such circumstances, as a means different from the above-mentioned means, a method of changing a refractory lined in a molten steel pot into a fixed brick and using an irregular refractory as a casting material has recently been adopted, and the refractory unit price has been adopted. Is being reduced.
この耐火物として不定形耐火物（以下、流し込み材と
言う。）を流し込み材料として用いる手段は、定形に形
成された耐火煉瓦を溶鋼鍋内壁にライニングする手段と
異なり、例えば、ジルコン質、高AL2O3等の材料の流し
込み材を、溶鋼鍋内壁に構成した型枠内に流し込んで補
修する流し込み施工手段であるが、この手段によって補
修された耐火物では、加熱、冷却による膨張・収縮の原
因によって使用中に罅割れが起こる。The means for using an irregular-shaped refractory (hereinafter, referred to as a pouring material) as the pouring material is different from a means for lining a refractory brick formed into a fixed shape on the inner wall of a molten steel pot. This is a casting method for repairing pouring materials such as 2 O 3 by pouring them into a formwork formed on the inner wall of the molten steel pot.However, refractories repaired by this means can prevent expansion and contraction due to heating and cooling. Cracks occur during use depending on the cause.
この為、この罅割れ部に地金差しを起こし、究極的に
は溶鋼漏れが生ずる。For this reason, a metal ingot is formed in the cracked portion, and ultimately leakage of molten steel occurs.
更に、前述の流し込み施工に使用される流し込み材は
一般に使用されている高耐用性材料による定形煉瓦に比
較して耐溶鋼摩耗性が低く、溶鋼鍋の精錬容器として使
用した時には溶鋼鍋の耐用寿命が短くなる。Furthermore, the cast material used in the above-mentioned casting work has a lower resistance to molten steel wear than conventional shaped bricks made of highly durable materials, and the service life of the molten steel pot when used as a refining vessel for the molten steel pot Becomes shorter.
また、近年定形煉瓦として使用されている含炭素系煉
瓦ではスラグ浸潤が殆ど起こらないのに反し、流し込み
施工による場合ではスラグ浸潤が起こり易い。In addition, while carbon-containing bricks used as standard bricks in recent years hardly cause slag infiltration, slag infiltration is likely to occur when casting bricks.
従って、使用中にスラグ付着部と流し込み材本体との
区別が判然とせず、溶鋼鍋の耐用寿命の終期を判断する
ことが困難となり、補修する時期の見極めも困難となっ
ていた。Therefore, it is not clear how to distinguish the slag-attached part from the cast material body during use, making it difficult to determine the end of the service life of the molten steel pot and to determine the time to repair.
従来の溶鋼鍋の補修方法としては、当該溶鋼鍋内壁に
ライニングされた耐火物全てを交換する大修理と、特定
部分、例えば、フリーボード部やスラグライン部の煉瓦
のみを交換する中修理、損傷部分の耐火煉瓦のみを交換
する小修理とに区分されている。Conventional methods for repairing molten steel pots include major repairs in which all refractories lined on the inner wall of the molten steel pot are replaced, and repairs and damages during replacement of only specific parts, for example, bricks in the freeboard section or slag line section. It is divided into small repairs where only the refractory bricks are replaced.
ところが大修理では耐火物原単価を増大させるので、
頻繁に施工することは芳しくなく、又小修理は耐用性が
１〜３回と低いために実施効果が極めて低い。However, major repairs increase the refractory price,
Frequent construction is not good, and small repairs have extremely low durability and are not very effective.
従って、溶鋼鍋の補修する際の製鋼原単価に占める耐
火物原単価を低減させるには、中修理を如何に経済的に
行うかが重要な問題として残る。Therefore, in order to reduce the unit price of refractories in the unit price of steelmaking when repairing a molten steel ladle, it remains as an important issue how to perform middle repair economically.
本発明は上述の観点に鑑み発明されたものであって、
その目的とするところは溶鋼鍋の耐用寿命を向上させる
為の補修手段として、中修理を経済的に行う溶鋼鍋のラ
イニング方法及び補修方法を提供することにある。The present invention has been invented in view of the above viewpoint,
It is an object of the present invention to provide a lining method and a repair method of a molten steel pot for performing medium repair economically as repair means for improving the service life of the molten steel pot.
（課題を解決するための手段） 本発明は前述の目的を達成する為に、溶鋼鍋のライニ
ング方法として、溶鋼鍋の一般壁部又は／及び敷部にAL
2O3−Ｃ系煉瓦、AL2O3−MgO−Ｃ系煉瓦等の耐構造スポ
ーリング性に強い煉瓦を、スラグライン部及びフリーボ
ードには不焼成MgO質煉瓦をライニングすると共に前記
一般壁部又は／及び敷部における煉瓦の表面に１〜2mm
のスラグ浸潤層を形成せしめた後、該一般壁部又は／及
び敷部に高AL2O3質又はZrO2・SiO2等の流し込み材を所
定の厚みにライニングするようにしたことを特徴とする
溶鋼鍋のライニング方法及び一般壁部又は／及び敷部に
おける煉瓦の表面に少なくとも１〜2mmの厚みのスラグ
浸潤層を形成せしめた後、該一般壁部又は／及び敷部に
高AL2O3質又はZrO2・SiO2等の不定形耐火物を所定の厚
みにライニングするようにした溶鋼鍋の補修方法を採用
したものである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a method for lining a molten steel pot, the method comprising:
A brick having strong structural spalling resistance, such as a 2 O 3 -C-based brick and an AL 2 O 3 -MgO-C-based brick, and a slag line portion and a free board lined with an unfired MgO brick and the general wall 1 to 2 mm on the surface of the brick at the floor or / and floor
After the slag infiltration layer is formed, a high AL 2 O 3 material or a casting material such as ZrO 2 · SiO 2 is lined on the general wall or / and the floor to a predetermined thickness. After forming a slag infiltration layer having a thickness of at least 1 to 2 mm on the surface of a brick in a lining method of a molten steel pot and a general wall or / and a floor, high AL 2 O is applied to the general wall or / and the floor. This method employs a method for repairing a molten steel pot in which an irregular refractory such as tri-metal or ZrO 2 · SiO 2 is lined to a predetermined thickness.
（作 用） 上述のように本発明の溶鋼鍋のライニング方法又は補
修方法によれば、スラグライン部、フリーボード部の各
煉瓦は交換するようにしたが、一般壁部、敷部の各煉瓦
については流し込み材を流し込み施工するようにした。(Operation) As described above, according to the method for lining or repairing a molten steel pot of the present invention, the bricks in the slag line portion and the free board portion are replaced, but the bricks in the general wall portion and the floor portion are replaced. As for, the casting material was poured in and poured.
これは一般壁部をも交換する場合には大修理になると
の理由からである。即ち、一般壁部の煉瓦の残存厚みが
小さく、予想使用回数が低い時には大修理となるが、中
修理時迄の取鍋使用回数が大きいと予測される時には中
修理が不可能となり、耐火物原単価が大幅に増大する。This is because a major repair will be required if the general wall is also replaced. That is, when the remaining thickness of the brick on the general wall is small and the expected number of uses is low, the repair is large, but when the number of uses of the ladle until the middle repair is expected to be large, the repair is impossible, and the refractory The original unit price increases significantly.
そこで、一般壁部の損傷が激しいと予測される場合に
は、上記スラグライン部等の耐火物に余命があっても時
期を早めて中修理を実施していた所以からである。Therefore, when it is predicted that the general wall portion is severely damaged, the reason is that even if the refractory such as the slag line portion has a life expectancy, the mid-term repair was carried out earlier.
次に、一般壁部の修理施工にアルミナ質等の流し込み
材を採用し、流し込み施工するのは、含炭素系定形耐火
煉瓦を使用している場合、使用後、耐火物のスラグ浸潤
層が１〜2mmと非常に薄い為、補修する際にスラグ浸潤
層をはつらなくとも鉄製スタッドを煉瓦内に打ち込むこ
とができ、又当該耐火物には浸潤層が存在するので、そ
の表面は粗く、ざらざらして流し込み材と耐火物とのな
じみが良く、強固に接着できる。Next, a cast material such as alumina is used for the repair work of the general wall, and the cast work is performed when the carbon-containing fixed refractory brick is used. Because it is very thin, up to 2 mm, iron studs can be driven into the brick without repairing the slag infiltration layer when repairing, and the refractory has an infiltration layer, so its surface is rough and rough. The refractory material and the cast material are well compatible and can be firmly bonded.
そこで、中修理時にはスラグライン部、フリーボード
部及び敷部の各耐火物は交換するようにし、更に、一般
壁部は新鍋時の煉瓦の厚みと同じ厚みとなるように流し
込み施工を実施するようにした。この結果、一般壁部の
寿命は延びて大修理期間中に中修理を従来の１回より２
回にすることができた。Therefore, at the time of medium repair, each refractory of the slag line part, free board part and floor part should be replaced, and furthermore, the general wall part will be poured so as to have the same thickness as the brick thickness at the time of the new pot I did it. As a result, the service life of the general wall is extended, and during the major repair period, the medium repair is performed two times more than the conventional one.
Could be times.
そして、２回目の中修理では耐火物表面の流し込み材
は全て溶損して消失する為、通常の継ぎ足し補修のよう
にスラグ変質部をスラグドレッサー等ではつり作業を施
す必要もない。In the second repair, the cast material on the surface of the refractory is completely melted away and disappears. Therefore, it is not necessary to suspend the deteriorated slag portion with a slag dresser or the like as in the case of ordinary rehabilitation.
また、流し込み部本体の背面部には含炭素系煉瓦を配
置させているので、流し込み部本体に罅割れが起り、地
金差しが起こっても支障がない。In addition, since the carbon-containing bricks are arranged on the back of the main body of the pouring portion, cracks occur in the main portion of the pouring portion, so that there is no problem even if a metal ingot occurs.
（実施例） 以下、本発明の補修方法の実施例を第１図の断面図に
基づき記述する。(Embodiment) Hereinafter, an embodiment of the repair method of the present invention will be described based on the cross-sectional view of FIG.
第１図は90T溶鋼鍋の断面を表わした構成図である
が、図中の符号（１）は溶鋼鍋（10）の底部にスタンプ
（７）に囲まれた敷部煉瓦、（２）は一般壁煉瓦、
（３）はスラグライン部煉瓦、（４）はフリーボード部
煉瓦、又（５）は流し込み材（６）を流し込み施工する
型枠であり、（８）は底部の敷部煉瓦（１）の一部に穿
孔した排滓口である。FIG. 1 is a configuration diagram showing a cross section of a 90T molten steel pot, where reference numeral (1) denotes a floor brick surrounded by a stamp (7) at the bottom of a molten steel pot (10), and (2) denotes a brick. General wall brick,
(3) is a slag line part brick, (4) is a free board part brick, (5) is a mold for casting a casting material (6), and (8) is a bottom part brick (1). It is a waste port that is partly perforated.
また、敷部煉瓦（１）及び一般壁部煉瓦（２）にはAL
2O3−Ｃ系煉瓦、AL2O3−MgO−Ｃ質煉瓦等の耐構造スポ
ーリング性に強い煉瓦を、また、精錬スラグに対する耐
蝕性を考慮してスラグイン部煉瓦（３）及びフリーボー
ド部煉瓦（４）にはMgO−Ｃ質煉瓦を使用している。AL is used for the floor brick (1) and the general wall brick (2).
Brick which is strong in structural spalling resistance such as 2 O 3 -C type brick, AL 2 O 3 -MgO-C brick and slag-in part brick (3) and free board in consideration of corrosion resistance to refining slag The brick (4) is made of MgO-C brick.
溶鋼鍋の基本構成は以上の通りであるが、溶鋼鍋をラ
イニングする際の施工手順を説明すると、先ず、前記の
通りの各煉瓦のライニングを終え、その後、溶滓を溶鋼
鍋内に注入する。Although the basic configuration of the molten steel pot is as described above, the construction procedure when lining the molten steel pot will be described.First, the lining of each brick as described above is completed, and then the slag is poured into the molten steel pot. .
溶滓が注入されゝば、前記敷部煉瓦（１）及び／又は
一般壁部煉瓦（２）の表面には１〜2mm程度のスラグ浸
潤層が形成される。When the slag is injected, a slag infiltration layer of about 1 to 2 mm is formed on the surface of the floor brick (1) and / or the general wall brick (2).
その後、溶鋼鍋内から溶滓を排出し、流し込み施工す
る型枠（６）を使用して流し込み材（AL2O3−MgO）を一
般壁部（２）及び／又は敷部煉瓦（１）に流し込み施工
を行う。Then, the slag is discharged from the molten steel pot, and the casting material (AL 2 O 3 -MgO) is poured into the general wall portion (2) and / or the floor brick (1) using the formwork (6) for casting. Perform casting work.
以上のようにして溶鋼鍋のライニングを行うが、溶鋼
鍋（10）内に溶滓が注入されゝば、スラグ浸潤層は昇温
して半溶融状態となり、一般壁部（２）及び／又は敷部
煉瓦（１）と流し込み材（６）とは完全に融合する。The lining of the molten steel pot is performed as described above. However, if the slag is poured into the molten steel pot (10), the slag infiltration layer is heated to a semi-molten state, and the general wall (2) and / or The floor brick (1) and the casting material (6) are completely fused.
以上のように構築された溶鋼鍋を大修理後40回使用し
た時点で中修理を施した結果、最溶損部の一般壁部煉瓦
（２）では厚み90mmの煉瓦が50mm損傷し、残存厚みが40
mm程度であった。When the molten steel pot constructed as described above was used 40 times after the major repair, it was repaired as a result. As a result, the 90 mm thick brick was damaged 50 mm in the most eroded general wall brick (2), and the remaining thickness was reduced. Is 40
mm.
また、一般壁部煉瓦（２）の最溶損部以外の所でも10
〜20mmの範囲に渡って損傷していた。更に、立上がり部
130mmの部分Ａでは５〜10mmの範囲で損傷していた。In addition, even in places other than the most eroded part of general wall brick (2),
Damaged over a range of ~ 20mm. Furthermore, the rising part
The portion A of 130 mm was damaged in the range of 5 to 10 mm.
この事実に基づき上記損傷部分の一般壁部煉瓦（２）
に型枠（５）掛けを施して原寸（90mm）の厚みになるよ
うに流し込み材（６）を流し込んで施工した。Based on this fact, the above-mentioned damaged wall brick (2)
Then, a casting material (6) was poured into the mold so as to have a thickness of the original size (90 mm).
このようにして構築した溶鋼鍋を再度継続使用したと
ころ、使用回数が31回までは全体的に流し込み材（６）
の付着が認められたが、使用回数が35回になると流し込
み材の付着が認められなかった。この為、使用回数が40
回で再度中修理を実施した。この時の一般壁部煉瓦
（２）の最溶損部の煉瓦残厚は約30mmの状態となってい
た。When the molten steel pot constructed in this manner was used again and again, the casting material was totally poured up to 31 times (6)
However, when the number of times of use was 35, adhesion of the pouring material was not observed. For this reason, the frequency of use is 40
The middle repair was carried out once again. At this time, the remaining thickness of the most eroded portion of the general wall brick (2) was about 30 mm.
以上の状態の溶鋼鍋を前述の通りに施工を施し、40回
の使用を行い中修理を行った時点で使用を止め、煉瓦の
残存厚みを測定した結果、一般壁部煉瓦（２）の最溶損
部の煉瓦残厚みが約20mmとなり、全体的には30mm程度に
薄くなったので大修理を行った。The molten steel pot in the above condition was constructed as described above, and was used 40 times. When the repair was performed, the use was stopped and the remaining thickness of the brick was measured. The remaining thickness of the brick in the eroded area was about 20 mm, and the overall thickness was reduced to about 30 mm.
この大修理では、従来では耐用寿命が80回の使用回数
が限度であったのが、本発明のライニング法又は補修方
法によれば使用回数が120回まで延長できた。Conventionally, in the major repair, the service life was limited to the number of uses of 80 times, but according to the lining method or the repair method of the present invention, the number of uses could be extended to 120 times.
（発明の効果） 本発明は、前述の如く，スラグライン部、フリーボー
ド部及び敷部の各耐火物は交換するようにし，一般壁部
及び／又は敷部の各煉瓦の溶損部には流し込み材を流し
込み施工してライニングするようにしたので、含炭素系
定形耐火煉瓦を使用している場合、使用後、煉瓦のスラ
グ浸潤層が１〜2mmと非常に薄い為、補修する際にスラ
グ浸潤層をはつらなくとも鉄製スタッドを煉瓦内に打ち
込むことができ、又当該煉瓦には浸潤層が存在するの
で、その表面は粗く、ざらざらして流し込み材と煉瓦と
のなじみが良く、強固に接着できた。(Effects of the Invention) As described above, the present invention makes it possible to replace each refractory in the slag line portion, the freeboard portion and the floor portion, and to replace the erosion portion of each brick in the general wall portion and / or the floor portion. Since the cast material is poured and lined, the slag infiltration layer of the brick is very thin after use, when using a carbon-containing fixed type refractory brick. The iron stud can be driven into the brick without breaking the infiltration layer, and the brick has an infiltration layer, so the surface is rough and rough, so that the pouring material and the brick fit well and are strong. I was able to adhere.
そして、この結果、一般壁部耐火物の寿命は延びて大
修理期間中に中修理を従来の１回より２回にすることが
できた。As a result, the service life of the general wall refractory was extended, and the number of medium repairs during the major repair period could be reduced to twice from the conventional one.
そして、２回目の中修理では耐火物表面の流し込み材
は全て溶損して消失する為、通常の継ぎ足し補修のよう
にスラグ変質部をスラグドレッサー等ではつり作業を施
す必要もない。In the second repair, the cast material on the surface of the refractory is completely melted away and disappears. Therefore, it is not necessary to suspend the deteriorated slag portion with a slag dresser or the like as in the case of ordinary rehabilitation.
また、流し込み施工部の背面部には含炭素系煉瓦を配
置させているので、流し込み施工部に罅割れが起り、地
金差しが起こっても支障がない。In addition, since the carbon-containing bricks are arranged on the back side of the pouring section, cracks occur in the pouring section, so that there is no problem even if a metal ingot occurs.
以上要するに、本発明のライニング方法によれば、耐
火物原単価の低減化を図ることができると共に耐用寿命
の延長が図れる等々の効果を有する。In short, according to the lining method of the present invention, it is possible to reduce the unit cost of the refractory material and to extend the service life of the refractory.
第１図は本発明の補修方法を施す溶鋼鍋を示す断面図、
第２図は一般的な溶鋼鍋構造を示す断面図である。 （１）……敷部煉瓦、（２）……一般壁煉瓦、（３）…
…スラグライン部煉瓦、（４）……フリーボード部煉
瓦、（５）……流し込み材用型枠、（６）……流し込み
材、（７）……スタンプ材、（８）……排滓口、（10）
……溶鋼鍋、FIG. 1 is a sectional view showing a molten steel pot to which the repair method of the present invention is applied.
FIG. 2 is a sectional view showing a general molten steel ladle structure. (1) ... brick brick, (2) ... brick wall, (3) ...
... Slag line part brick, (4) ... Free board part brick, (5) ... Pouring material formwork, (6) ... Pouring material, (7) ... Stamp material, (8) ... Waste Mouth, (10)
...... Molten steel pot,
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ２７Ｄ 1/16 Ｆ２７Ｄ 1/16 Ｖ (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 41/02 B22D 11/10 310 C21C 5/44 C21C 7/00 F27D 1/00,1/16──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 identification code FI F27D 1/16 F27D 1/16 V (58) Field surveyed (Int. Cl. 6 , DB name) B22D 41/02 B22D 11 / 10 310 C21C 5/44 C21C 7/00 F27D 1 / 00,1 / 16
Claims (3)
−Ｃ系煉瓦、AL2O3−MgO−Ｃ系煉瓦等の耐構造スポーリ
ング性に強い煉瓦を、スラグライン部及びフリーボード
には不焼成MgO−Ｃ質煉瓦をライニングすると共に前記
一般壁部又は／及び敷部における煉瓦の表面にスラグ浸
潤層を形成せしめた後、該一般壁部又は／及び敷部に高
AL2O3質又はZrO2・SiO2等の不定形耐火物を所定の厚み
にライニングするようにしたことを特徴とする溶鋼鍋の
ライニング方法。(1) AL 2 O 3 is applied to a general wall portion and / or a floor portion of a molten steel pot.
-C bricks, AL 2 O 3 -MgO-C bricks and other bricks that are resistant to structural spalling, slag line sections and free boards are lined with unfired MgO-C bricks and the general wall sections And / or after forming a slag infiltration layer on the surface of the brick at the floor, a high level is applied to the general wall or / and floor.
A method for lining a molten steel pot, characterized in that an amorphous refractory such as AL 2 O 3 or ZrO 2 · SiO 2 is lined to a predetermined thickness.
般壁部又は／及び敷部における煉瓦の表面に形成するス
ラグ浸潤層を、少なくとも１〜2mmの厚みに形成するこ
とを特徴とする溶鋼鍋のライニング方法。2. The method according to claim 1, wherein the slag infiltration layer formed on the surface of the brick in the general wall portion and / or the laying portion has a thickness of at least 1 to 2 mm. And lining method of molten steel pot.
般壁部又は／及び敷部にAL2O3−Ｃ系煉瓦、AL2O3−MgO
−Ｃ系煉瓦等の耐構造スポーリング性に強い煉瓦を、ス
ラグライン部及びフリーボードには不焼成MgO−Ｃ質煉
瓦をライニングすると共に前記一般壁部又は／及び敷部
における煉瓦の表面にスラグ浸潤層を形成せしめた後、
該一般壁部又は／及び敷部における煉瓦の表面に少なく
とも１〜2mmの厚みのスラグ浸潤層を形成せしめた後、
該一般壁部又は／及び敷部に高AL2O3質又はZrO2・SiO2
等の不定形耐火物を所定の厚みにライニングするように
したことを特徴とする溶鋼鍋の補修方法。3. When repairing a molten steel pot, AL 2 O 3 —C-based brick and AL 2 O 3 —MgO are applied to a general wall portion and / or a floor portion of the molten steel pot.
-A brick having strong structural spalling resistance such as -C brick, a non-fired MgO-C brick on a slag line portion and a free board, and a slag on a surface of the brick in the general wall portion and / or the floor portion. After forming the infiltration layer,
After forming a slag infiltration layer having a thickness of at least 1 to 2 mm on the surface of the brick in the general wall or / and the floor,
High AL 2 O 3 quality or ZrO 2 · SiO 2 on the general wall and / or floor
A method for repairing a molten steel ladle, characterized by lining an irregular-shaped refractory, such as, to a predetermined thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3482290A JP2768785B2 (en) | 1990-02-14 | 1990-02-14 | Method of lining and repair of molten steel pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3482290A JP2768785B2 (en) | 1990-02-14 | 1990-02-14 | Method of lining and repair of molten steel pot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03238162A JPH03238162A (en) | 1991-10-23 |
| JP2768785B2 true JP2768785B2 (en) | 1998-06-25 |
Family
ID=12424892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3482290A Expired - Lifetime JP2768785B2 (en) | 1990-02-14 | 1990-02-14 | Method of lining and repair of molten steel pot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2768785B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100515600B1 (en) * | 2000-12-22 | 2005-09-16 | 재단법인 포항산업과학연구원 | Recycling Method of Residual Castables for Teeming Ladle |
| KR100515601B1 (en) * | 2000-12-22 | 2005-09-16 | 재단법인 포항산업과학연구원 | Recycling Method of Residual Castables for Teeming Ladle |
| KR100522347B1 (en) * | 2001-12-22 | 2005-10-18 | 주식회사 포스코 | Recycling method of residual castables using dolomite and slag |
| CN104399959B (en) * | 2014-12-02 | 2016-07-06 | 武汉钢铁(集团)公司 | A kind of masonry construction that can improve ladle bottom life cycle |
| CN104858409A (en) * | 2015-05-15 | 2015-08-26 | 武汉威林科技股份有限公司 | Steel ladle for steelmaking |
| CN105618725A (en) * | 2016-02-22 | 2016-06-01 | 宁夏朗盛精密制造技术有限公司 | Compositely-bricked small-medium-sized steel ladle work lining |
| CN111995408B (en) * | 2020-08-18 | 2022-07-05 | 武汉钢铁集团耐火材料有限责任公司 | Repairing material and repairing method for working layer at bottom of molten iron tank |
| CN112643018A (en) * | 2020-12-09 | 2021-04-13 | 攀枝花钢城集团有限公司 | Method for building long-life ladle bottom of ladle |
-
1990
- 1990-02-14 JP JP3482290A patent/JP2768785B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03238162A (en) | 1991-10-23 |
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