JP2755891B2 - Repair method for refractory lining of molten metal container - Google Patents
Repair method for refractory lining of molten metal containerInfo
- Publication number
- JP2755891B2 JP2755891B2 JP5153122A JP15312293A JP2755891B2 JP 2755891 B2 JP2755891 B2 JP 2755891B2 JP 5153122 A JP5153122 A JP 5153122A JP 15312293 A JP15312293 A JP 15312293A JP 2755891 B2 JP2755891 B2 JP 2755891B2
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- molten metal
- metal container
- ladle
- remaining
- 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
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融金属容器の内張り
不定形耐火物の補修方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a refractory lining of a molten metal container.
【０００２】[0002]
【従来の技術】近年、取鍋やタンディッシュなど溶融金
属容器の内張り耐火物として、簡便な施工により作業労
働負荷の軽減を図るために、流し込み不定形耐火物の使
用が増大している。更に、使用後の残存不定形耐火物に
継ぎ足し補修を行い、耐火物の有効使用率の向上が図ら
れている。2. Description of the Related Art In recent years, cast refractory has been increasingly used as a refractory for lining a molten metal container such as a ladle or a tundish in order to reduce the work load by simple construction. Further, repair is performed by adding to the remaining irregular shaped refractory after use to improve the effective use rate of the refractory.
【０００３】前述の残存不定形耐火物に対する継ぎ足し
補修については、一般に使用中に継ぎ足し部の剥落など
によるトラブルを回避するため、残存不定形耐火物表層
のスラグの浸潤などによる変質層を除去した後、継ぎ足
し用不定形耐火物を流し込み、残存不定形耐火物と一体
化を図る方法が採用されており、特開平１−107091号公
報には、上記の残存不定形耐火物表層の変質層を除去す
る効率的な装置が開示されている。[0003] In addition to the above-mentioned repairing of the remaining amorphous refractory, generally, in order to avoid troubles such as peeling off of the extended portion during use, an altered layer due to infiltration of slag or the like in the surface layer of the remaining amorphous refractory is removed. In addition, a method of pouring in a refractory refractory for replenishment and integrating the refractory refractory with the remaining refractory has been adopted. An efficient device is disclosed.
【０００４】ところで、不定形耐火物の継ぎ足し補修に
ついては、残存耐火物と継ぎ足し補修耐火物との接着力
が重要であり、その接着力が不足の場合には、比較的使
用初期に継ぎ足し部のはく離が生じて補修後の耐火物の
寿命が著しく低下したり、継ぎ足し部のはく離によって
注湯部の閉塞などのトラブルが生じる危険性もある。こ
の残存部と継ぎ足し部の接着方法に関しては、特開平２
−224867号公報に、珪酸ソーダ系のモルタルを塗布する
方法が開示されている。[0004] In addition, in the replenishment and repair of irregular shaped refractories, the adhesive strength between the refractory and the replenished repair refractory is important. If the adhesive strength is insufficient, the replenishment portion is relatively relatively early in use. There is also a risk that peeling will occur and the life of the refractory after repair will be significantly reduced, and troubles such as clogging of the pouring portion will occur due to peeling of the refill. Regarding a method of bonding the remaining portion and the replenished portion, see Japanese Unexamined Patent Application Publication No.
Japanese Patent Application No. 224867 discloses a method of applying a sodium silicate mortar.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、特開平
１−107091号公報に開示された装置を使用して残存不定
形耐火物表層の変質層を除去した後、不定形耐火物を継
ぎ足し補修する方法では、残存不定形耐火物表層の変質
層を余計に除去してしまい、継ぎ足し補修するための不
定形耐火物の量が多量に必要であり、不定形耐火物のコ
ストが却って増加してしまうだけでなく、該装置の設備
費も多額であるという問題がある。However, after removing the altered layer of the surface layer of the remaining amorphous refractory by using the apparatus disclosed in Japanese Patent Application Laid-Open No. 1-107091, a method of adding and repairing the amorphous refractory is used. In this case, the extraneous layer on the surface layer of the remaining refractory is excessively removed, and a large amount of the refractory is required to be added and repaired, and the cost of the refractory increases only. In addition, there is a problem that the equipment cost of the device is large.
【０００６】また、特開平２−224867号公報に開示され
ている珪酸ソーダ系のモルタルを残存不定形耐火物の表
面に塗布する方法では、使用中に残存部表層のスラグ浸
潤などによって生成した低融点化合物と反応し、全く異
質な層を形成させるなど、残存部と継ぎ足し部との境界
では異質の耐火物層が存在することになり、その境界部
からはく離などのトラブルが発生するため好ましくない
という問題がある。In the method disclosed in Japanese Patent Application Laid-Open No. 2-224867, in which sodium silicate mortar is applied to the surface of a residual amorphous refractory, a low mortar formed by slag infiltration of the residual surface layer during use. It reacts with the melting point compound and forms a completely different layer, such that a different refractory layer is present at the boundary between the remaining portion and the extension portion, and trouble such as separation from the boundary portion occurs, which is not preferable. There is a problem.
【０００７】本発明は前記課題を解決した溶融金属容器
の内張り不定形耐火物の補修方法を提供することを目的
とする。An object of the present invention is to provide a method for repairing a refractory lining of a molten metal container which solves the above-mentioned problems.
【０００８】[0008]
【課題を解決するための手段】本発明は、溶融金属容器
の内張り不定形耐火物を補修する際に、残存不定形耐火
物表層の変質層部を除去しないで、該残存不定形耐火物
表層部に耐火材料を含まない無機塩のペーストを塗布し
た後、新たな不定形耐火物を流し込むことを特徴とする
溶融金属容器の内張り不定形耐火物の補修方法である。SUMMARY OF THE INVENTION The present invention provides a method for repairing an irregular refractory lining of a molten metal container without removing a deteriorated layer portion of the remaining irregular refractory surface layer. A method for repairing a refractory lining of a molten metal container, characterized by applying a new refractory after applying an inorganic salt paste containing no refractory material to a portion.
【０００９】以下に本発明の構成を説明する。図１は取
鍋の鉄皮１の内面の残存不定形耐火物２の表層部に、無
機塩のペースト４を塗布した後、新たな不定形耐火物５
および５ａを流し込み施工した取鍋の不定形耐火物施工
断面図である。The configuration of the present invention will be described below. FIG. 1 shows a case where a paste 4 of an inorganic salt is applied to the surface layer of the remaining amorphous refractory 2 on the inner surface of the iron shell 1 of the ladle, and then a new amorphous refractory 5
And FIG. 5B is a cross-sectional view of a ladle in which an irregular-shaped refractory has been poured and constructed.
【００１０】[0010]
【作 用】ところで、残存不定形耐火物２の表層部と継
ぎ足し部の接着に関して、低温域での接着剤としてペイ
ント、グリスに代表される有機塩のペーストを塗布する
方法があるが、塗布被膜が有機塩のものでは200 ℃付近
の温度ですでに気化し、それ以上の温度での接着機能を
有さない。[Operation] By the way, with regard to the adhesion between the surface layer portion and the reinforced portion of the residual amorphous refractory 2, there is a method of applying a paste of an organic salt typified by paint or grease as an adhesive at a low temperature range. However, in the case of organic salt, it is already vaporized at a temperature of around 200 ° C. and has no adhesive function at a temperature higher than 200 ° C.
【００１１】従って燐酸塩、水ガラスなどに代表される
無機塩のペーストを塗る方法に着目した。この方法であ
れば無機塩の塗布被膜は500 ℃付近で軟化溶解し残存部
と継ぎ足し部の接着を促進する。また、1000℃以上の高
温では残存部のスラグ浸潤により生成した低融点化合物
が軟化溶融し、継ぎ足し部との焼結を促進し強固な接着
機能を果たす。Accordingly, attention has been paid to a method of applying a paste of an inorganic salt represented by a phosphate, water glass, or the like. According to this method, the coating film of the inorganic salt softens and dissolves at around 500 ° C., and promotes adhesion between the remaining portion and the joint portion. At a high temperature of 1000 ° C. or higher, the low-melting point compound produced by slag infiltration in the remaining portion softens and melts, and promotes sintering with the replenished portion to perform a strong bonding function.
【００１２】本発明法によれば、溶融金属容器の内張り
不定形耐火物を補修する際に、残存不定形耐火物表層の
変質層部を除去しないで、該残存不定形耐火物表層部に
無機塩のペーストを塗布した後、新たな不定形耐火物を
流し込む作業を行うので、補修部と継ぎ足し部とがはく
離せず、溶融金属容器の内張り耐火物の寿命の延長が可
能となる。According to the method of the present invention, when repairing the amorphous refractory lining of a molten metal container, the altered layer portion of the surface layer of the remaining amorphous refractory is not removed, and the surface layer of the remaining amorphous refractory is removed. After the salt paste is applied, a work of pouring a new irregular-shaped refractory is performed, so that the repaired portion and the extension portion are not separated, and the life of the refractory lining the molten metal container can be extended.
【００１３】次に、前記本発明の構成を示す図１の取鍋
の不定形耐火物施工断面図について、その施工手順を図
２を用いて具体的に説明する。先ず、図２(a) は取鍋鉄
皮１内の残存不定形耐火物２の底部表面に、地金３が付
着している取鍋断面図であり、図２(b) はその地金３を
取り除いた取鍋断面図である。次に図２(c) の断面図に
示すように、残存不定形耐火物２の表層部に無機塩のペ
ースト４を塗布した。図２(d) は取鍋底部の残存不定形
耐火物２に塗布した無機塩のペースト４の上に新たな不
定形耐火物５を流し込んだ状態を示す。Next, with reference to FIG. 2, the construction procedure of the irregular shaped refractory section of the ladle of FIG. 1 showing the construction of the present invention will be described in detail. First, FIG. 2A is a sectional view of a ladle in which a metal 3 is adhered to the bottom surface of the residual amorphous refractory 2 in the ladle 1 and FIG. It is ladle sectional drawing from which 3 was removed. Next, as shown in the cross-sectional view of FIG. 2C, a paste 4 of an inorganic salt was applied to the surface layer of the remaining amorphous refractory 2. FIG. 2D shows a state in which a new amorphous refractory 5 is poured onto the inorganic salt paste 4 applied to the residual amorphous refractory 2 at the bottom of the ladle.
【００１４】次に、図２(e) のように中子６をセット
し、図２(f) に示すように残存不定形耐火物２と中子６
との間に新たな不定形耐火物５ａを流し込み硬化後中子
６を矢印方向へ引上げ、不定形耐火物の養生および乾燥
・加熱を行う。Next, the core 6 is set as shown in FIG. 2 (e), and the remaining irregular refractory 2 and the core 6 are set as shown in FIG. 2 (f).
After that, a new amorphous refractory 5a is poured, and after hardening, the core 6 is pulled up in the direction of the arrow to cure, dry and heat the amorphous refractory.
【００１５】[0015]
【実施例】以下に本発明の実施例について、表を参照し
て説明する。実施例１として、Ａｌ2Ｏ3 を91％および
ＭｇＯを６％含有したアルミナ系不定形耐火物を100ｔ
取鍋に施工し、使用後該不定形耐火物を回収し切出した
ピースを作製し、該不定形耐火物の表層に無機塩を塗布
した後、継ぎ足し用不定形耐火物として同種の不定形耐
火物を鋳込み、図３に示す試料を作製し、1500℃で３時
間熱処理した後、継ぎ足し部境界での接着強度を測定
し、その結果を表１に示す。Embodiments of the present invention will be described below with reference to the tables. As Example 1, an alumina-based amorphous refractory containing 91% of Al 2 O 3 and 6% of MgO was 100 tons.
Installed in a ladle, collect the irregular shaped refractory after use, make a piece cut out, apply an inorganic salt to the surface layer of the irregular shaped refractory, then add the same type of irregular shaped refractory After casting, the sample shown in FIG. 3 was prepared and heat-treated at 1500 ° C. for 3 hours. Then, the adhesive strength at the boundary of the added portion was measured, and the results are shown in Table 1.
【００１６】[0016]
【表１】 [Table 1]
【００１７】上記の表１から、試料Ａが最高の接着強度
を示し、本発明法に使用する無機塩としては最適である
ことが判明した。次に、実施例２として、Ａｌ2Ｏ3 を9
1％およびＭｇＯを６％含有したアルミナ系不定形耐火
物を100ｔ取鍋に施工し、120 チャージ使用した後、図
２に示した本発明の補修方法に従って、珪酸ソーダ液を
２mm厚に吹き付けた後、同種の不定形耐火物を継ぎ足し
施工した。From Table 1 above, it was found that Sample A exhibited the highest adhesive strength and was most suitable as the inorganic salt used in the method of the present invention. Next, as a second embodiment, the Al 2 O 3 9
An alumina-based amorphous refractory containing 1% and 6% of MgO was applied to a 100-ton ladle, used for 120 charges, and then sprayed with a sodium silicate solution to a thickness of 2 mm according to the repair method of the present invention shown in FIG. Later, the same type of irregular-shaped refractory was added and constructed.
【００１８】その100ｔ取鍋の施工体を養生乾燥加熱し
た後、再使用したが、使用途中で継ぎ足し部のはく離な
どは起こらず、安定した損耗形態を示し、継ぎ足し施工
後122 チャージ使用でき、合計242 チャージ受鋼するこ
とができた。After the cured body of the 100-ton ladle was cured, dried and heated, it was reused. However, peeling of the replenishing portion did not occur during use, showing a stable form of wear. After replenishment, 122 charges could be used. 242 A charge was received.
【００１９】[0019]
【発明の効果】本発明の溶融金属容器内張り不定形耐火
物の補修方法を実施することにより、取鍋の中間補修後
も継ぎ足し不定形耐火物の部分剥落や部分溶損もなくな
り、平均して溶損するので、取鍋寿命が前より遙に延長
し、耐火物の有効利用率がより一層向上し、耐火物のコ
スト削減や、中間補修時の変質層の除去作業も省け、作
業工数も遙に削減できる。By implementing the method for repairing irregular shaped refractories lining a molten metal container according to the present invention, even after the intermediate repair of a ladle, the irregular shaped refractories can be prevented from being partially stripped or partially melted, and on average. Because of erosion, the ladle life is much longer than before, the effective utilization rate of refractories is further improved, the cost of refractories is reduced, and the work of removing the deteriorated layer during intermediate repairs is eliminated, and the number of man-hours is reduced. Can be reduced.
【００２０】なお、本発明は取鍋だけでなく、タンディ
ッシュや他の溶融金属容器にも適用が可能である。The present invention is applicable not only to ladles but also to tundishes and other molten metal containers.
【図１】本発明法の取鍋の不定形耐火物施工断面図であ
る。FIG. 1 is a cross-sectional view of a ladle according to the present invention, in which a refractory is formed in an irregular shape.
【図２】本発明法の施工手順を示す説明図である。FIG. 2 is an explanatory view showing a construction procedure of the method of the present invention.
【図３】本発明法における試料の作製図である。FIG. 3 is a view showing the preparation of a sample in the method of the present invention.
１ 鉄皮 ２ 残存不定形耐火物 ３ 残存地金 ４ 無機塩のペーストの被膜 ５ 取鍋の敷部に継ぎ足し施工した不定形耐火物 ５ａ取鍋の壁部に継ぎ足し施工した不定形耐火物 ６ 中子 DESCRIPTION OF SYMBOLS 1 Iron shell 2 Remaining amorphous refractory 3 Remaining ingot 4 Inorganic salt paste coating 5 Irregular refractory added to ladle pad 5a Irregular refractory added to ladle wall 6 Medium Child
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 41/02 B22D 11/10 310 F27D 1/16──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B22D 41/02 B22D 11/10 310 F27D 1/16
Claims (1)
修する際に、残存不定形耐火物表層の変質層部を除去し
ないで、該残存不定形耐火物表層部に耐火材料を含まな
い無機塩のペーストを塗布した後、新たな不定形耐火物
を流し込むことを特徴とする溶融金属容器の内張り不定
形耐火物の補修方法。When repairing an amorphous refractory lining of a molten metal container, an inorganic layer containing no refractory material in the surface layer of the residual amorphous refractory without removing a deteriorated layer of the surface layer of the residual amorphous refractory. A method for repairing a refractory lining of a molten metal container, wherein a new refractory is poured after a salt paste is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5153122A JP2755891B2 (en) | 1993-06-24 | 1993-06-24 | Repair method for refractory lining of molten metal container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5153122A JP2755891B2 (en) | 1993-06-24 | 1993-06-24 | Repair method for refractory lining of molten metal container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH079118A JPH079118A (en) | 1995-01-13 |
| JP2755891B2 true JP2755891B2 (en) | 1998-05-25 |
Family
ID=15555462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5153122A Expired - Lifetime JP2755891B2 (en) | 1993-06-24 | 1993-06-24 | Repair method for refractory lining of molten metal container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2755891B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695329A (en) * | 2017-09-18 | 2018-02-16 | 北京利尔高温材料股份有限公司 | A kind of carbon-free ladle wall application process |
| CN108204743A (en) * | 2017-12-28 | 2018-06-26 | 攀枝花钢城集团有限公司 | A kind of method for repairing and mending of rotary kiln refractory material layer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122659A (en) * | 1987-11-06 | 1989-05-15 | Kawasaki Steel Corp | Protection of permanent lining internal insulation of molten metal container |
| JP2766660B2 (en) * | 1989-02-23 | 1998-06-18 | 川崎炉材株式会社 | Repair method of molten metal container |
| JPH04110594A (en) * | 1990-08-31 | 1992-04-13 | Kawasaki Steel Corp | Method of repairing refractory lining with padding |
-
1993
- 1993-06-24 JP JP5153122A patent/JP2755891B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079118A (en) | 1995-01-13 |
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