JPH02219981A - Method for repairing low frequency induction melting furnace - Google Patents
Method for repairing low frequency induction melting furnaceInfo
- Publication number
- JPH02219981A JPH02219981A JP4058689A JP4058689A JPH02219981A JP H02219981 A JPH02219981 A JP H02219981A JP 4058689 A JP4058689 A JP 4058689A JP 4058689 A JP4058689 A JP 4058689A JP H02219981 A JPH02219981 A JP H02219981A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- refractory material
- lining
- former
- homer
- 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.)
- Pending
Links
- 230000006698 induction Effects 0.000 title claims abstract description 9
- 238000002844 melting Methods 0.000 title claims abstract description 7
- 230000008018 melting Effects 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000011819 refractory material Substances 0.000 claims abstract description 13
- 238000009415 formwork Methods 0.000 claims description 2
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 235000019353 potassium silicate Nutrition 0.000 abstract description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000000945 filler Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 102000010029 Homer Scaffolding Proteins Human genes 0.000 description 24
- 108010077223 Homer Scaffolding Proteins Proteins 0.000 description 24
- 230000008439 repair process Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- 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］
本発明は部分的に浸食されに金属溶解用低周波誘導溶解
炉の炉壁耐火物（以下ライニングと称する）を修理する
方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for repairing a partially eroded furnace wall refractory (hereinafter referred to as lining) of a low frequency induction melting furnace for metal melting. .
［従来の技術コ
誘導炉、特に低周波誘導炉は溶解した金属（以下溶Ｉと
称する）が炉の中で強力に撹拌されるので、ライニング
が浸食され単なる高温にさらされたり、スラグによって
浸食される他の炉と異なる。[Conventional technology] In induction furnaces, especially low-frequency induction furnaces, the molten metal (hereinafter referred to as molten I) is strongly stirred in the furnace, so the lining may be eroded and exposed to high temperatures, or eroded by slag. It is different from other furnaces.
即ち誘導炉の電磁的特性から炉内溶湯が撹拌される吠態
は一定の渦的流れをするので、炉壁の特定か所が局部的
に浸食されるため部分的な修理を何回か行ない、その後
浸食の程度によって全体修理がなされる．炉のライニン
グ全体を修理するには、炉の内形に準じた鉄板製の型枠
（以下ホーマーと云う）を作って炉内所定の位置にセラ
１・する。この時の炉体は鉄製の外殻とその内側の主と
して耐火レンガによる内張りとから出来ており、セット
した型枠との閏に一定の間隔が生ずる如く構成されてい
る．この空所に粉子粒状の耐火材料を流下した後ホーマ
ーを煽動するなどして十分に充填する．このホーマーは
修理するか所を覆えば良いが、炉のライニングは溶湯を
保時するためにｍ要であるから、局部的な修理であって
も底部を有する本格的なホーマーを使って第１１！ｌの
如く築炉して来た．炉全体のライニング修理時には炉内
全体をカバーするため炉頂までの第ｍｉｌｌ！ｌに示し
た点線の如き位置までをカバーする長いホーマーを使用
するが、周Ｕ修理に用うるホーマーも余り変わらない構
造である。In other words, due to the electromagnetic characteristics of the induction furnace, the molten metal in the furnace is stirred in a constant vortex flow, so certain parts of the furnace wall were locally eroded, so partial repairs were carried out several times. Then, depending on the degree of erosion, the entire structure will be repaired. To repair the entire lining of a furnace, a mold made of iron plate (hereinafter referred to as a homer) is made to match the internal shape of the furnace, and the mold is placed in a predetermined position inside the furnace. The furnace body at this time was made of an iron outer shell and an inner lining made of mainly refractory bricks, and was constructed so that there was a certain gap between the mold and the set formwork. After pouring powdered refractory material into this space, fill it sufficiently by stirring the homer. This homer can be used to cover the area to be repaired, but since the lining of the furnace is necessary to preserve the molten metal, a full-fledged homer with a bottom can be used even for local repairs. ! I built a furnace like l. When repairing the lining of the entire furnace, the entire inside of the furnace must be covered, so it is necessary to repair the lining up to the top of the furnace. A long homer is used that covers the area as shown by the dotted line shown in 1, but the homer used for circumferential U repair also has a similar structure.
［本発明が解決しようとする問題点コ
底つきホーマーを安ｔして炉底にセットし、炉壁の厚さ
を炉円周全体が一定になる如くするためと、Ｉ洩れ検知
用アンテナをホーマーに接続するために炉底およびその
周辺を面り起こして成形する必要がある。この為には炉
の中に人って作業しなければならないが、炉の稼動率を
あげるためにこの作業は余熱がこもる熱い炉の中に入フ
て人手で１テなわなければならないので、暑さと耐火材
を蕾砕した粉塵がたち込める厳しい作業環境である。[Problems to be solved by the present invention] In order to set the bottomed homer on the bottom of the furnace, to make the thickness of the furnace wall constant over the entire furnace circumference, and to install an antenna for leak detection. In order to connect to the homer, it is necessary to bend and mold the hearth bottom and its surroundings. To do this, a person must work inside the furnace, but in order to increase the operating rate of the furnace, this work must be done manually by entering the hot furnace where residual heat is trapped. The work environment is harsh, with heat and dust that has broken down the refractory materials.
また、このホーマーは鉄板で作られているが使用量が少
ないので手作りであり、かつホーマーの形状によって炉
のライニング厚さが決まるうえ、寸法も正確さが要求さ
れるために高価である。さらに炉壁の厚さをある程度コ
ントロールしたい場合でも、底つき形状のために余り自
由度がなく調節が難しいなど多くの問題点をかかえてい
る。In addition, this homer is made of iron plate, but it is handmade because the amount used is small, and the thickness of the furnace lining is determined by the shape of the homer, and the dimensions must be accurate, so it is expensive. Furthermore, even if it is desired to control the thickness of the furnace wall to some extent, there are many problems such as the bottomed shape does not give much flexibility and adjustment is difficult.
［問題点を解決するための手段］
本発明は上記種々の問題点を解決するためになされたも
のであフて、局部的な炉修理に際し、高価なホーマーを
出来るだけ小型にし、かつ炉内に設置する自由度を大き
くするために、炉壁の浸食が烈しく修理を要する部分に
のみホーマーを用うることを考九たものであり、従って
このホーマーには底部分が省略されている。このホーマ
ーを所ｔの位置にセットするには、炉の中間でホーマー
を支持することが必要であるが、これは炉底が上広がり
の形をしているので、この上締部にひっかかる如くした
（第３図参ｐ！ｉ）、これによって炉壁浸食部分をカバ
ーする如くホーマーをセットすることができた。このホ
ーマーの下端縁部は、例えば水分が多く粘度が高い可塑
性耐火材料を充填し位置を回走して補強すると同時に、
浸食部修理のためにホーマーと炉内張りとの空間に流し
込む粉粒状耐火材料の漏れ出しをも防ぐごとくした。[Means for Solving the Problems] The present invention has been made to solve the various problems mentioned above.The present invention has been made in order to solve the various problems mentioned above. In order to increase the degree of freedom in installation, the homer was designed so that it could be used only in areas of the furnace wall that were severely eroded and required repair, so the bottom part was omitted from this homer. In order to set this homer at position t, it is necessary to support the homer in the middle of the furnace, but since the bottom of the furnace is shaped like an upward spread, it is necessary to support the homer in the middle of the furnace. (see Fig. 3, p!i), which made it possible to set the homer so as to cover the eroded part of the furnace wall. The lower edge of this homer is filled with, for example, a plastic refractory material with high moisture content and high viscosity, and is reinforced by moving around the position.
This also prevents the leakage of powdery refractory material that is poured into the space between the homer and the furnace lining to repair eroded areas.
［実施例］
深さ約１８５０ａ＋−の８を鋳鉄溶解用低周波誘導炉の
炉修を末法によフて実施した例を示す。[Example] An example will be shown in which a low frequency induction furnace for melting cast iron was repaired using the final method.
浸食の著しい部分は第２図に見る如く炉底から約４５０
ｍ５上の垂直下方部分で１２０〜１５０＋ｓ−程度の帯
状をしており、その上下の浸食は緩かである。そこで浸
食の著しい部分を主体に高さ５００ｍｍ直径９５０−■
の円筒状底なしホーマー（＋）を位置決めしてセットし
、底壁テーパ一部（２）にひっかかるホーマーの下端（
３）を、アルミナ系粉状耐火物に水ガラスを混ぜて練り
合わせ可塑性をもたせた詰め物で塗り固め固走したく４
）、炉の内張り（５）とホーマー（１）との隙間には含
Ｂ２Ｏ３シリカ系市販粉粒耐火物を充填して搗き固めた
。炉底部分の大きな凸凹は補修したが積極的な堀返し補
修は行なっていない。鋳鉄戻し屑４ｔと鋼屑４ｔとを逐
次装入し、通電加熱する。その後常法によって溶解し１
５５０’ｃに一時ｒｌ’ｌｅｉ！侍して耐火物の焼結を
行つな、以後通常の球状黒鉛鋳鉄溶ｌを生産したが材質
１作業性、耐火材の浸食状況など全く問題なかった。第
１表は炉１１時の実績である。As shown in Figure 2, the severely eroded area is about 450 meters from the bottom of the hearth.
The vertical lower part above m5 has a band shape of about 120 to 150+s-, and the erosion above and below it is gradual. Therefore, the height of 500mm and the diameter of 950mm are mainly located in the severely eroded areas.
Position and set the cylindrical bottomless homer (+), and the lower end of the homer (
3) is mixed with alumina-based powder refractory and water glass, and then coated with a plastic filling to harden and solidify 4.
), the gap between the furnace lining (5) and the homer (1) was filled with B2O3-containing silica-based commercially available powder refractories, and the mixture was pounded and hardened. The large unevenness at the bottom of the hearth was repaired, but no active digging was done. 4 tons of returned cast iron scraps and 4 tons of steel scraps are sequentially charged and heated with electricity. After that, dissolve it by the usual method.
Temporary rl'lei at 550'c! Since then, we have produced ordinary molten spheroidal graphite cast iron without sintering the refractories, but there were no problems with the material, workability, or corrosion of the refractories. Table 1 shows the results at 11 o'clock in the furnace.
〔効果］
底のない円筒状ホーマーであるから安価である（約１７
２となった〉し軽量で取扱いが楽である。炉底の１１１
簡単に済み、アンテナをセットし直したりホーマーとの
接触を細工したりする必要がない、従って炉内での防暑
作業が著しく短縮され約１７２で済んだ上に、炉脩埋時
開が短いので炉の稼動率が上がり設備の有効利用がはか
れた。[Effect] It is a bottomless cylindrical homer, so it is inexpensive (approximately 17
2), it is lightweight and easy to handle. 111 at the bottom of the hearth
It is easy to do, and there is no need to reset the antenna or modify the contact with the homer. Therefore, the heat protection work inside the furnace is significantly shortened, and it only takes about 172cm, and the opening time when the furnace is buried is short. The operating rate of the furnace has increased and the equipment has been used more effectively.
第１図は従来の修理方法を、また第２図は炉壁の局部浸
食状況を示す炉体断面概略図であり、第３図は本発明の
実施例を示す炉体断面概略図である。
１、円筒状ホーマー ４．アルミナ＋水ガラスの可塑性
物体 ５．炉の内張り ６、補植用耐火材８．１！つき
ホーマー １０． ｍ洩れ検知用アンテナ特許出願人
自動ＸＬ鋳物株式会社
取締役社長 石 川 清 夫
図
ｉ
富１図
集２図FIG. 1 is a schematic sectional view of the furnace body showing a conventional repair method, FIG. 2 is a schematic cross-sectional view of the furnace body showing the state of local erosion of the furnace wall, and FIG. 3 is a schematic cross-sectional view of the furnace body showing an embodiment of the present invention. 1. Cylindrical homer 4. Plastic object of alumina + water glass 5. Furnace lining 6, Refractory material for supplementary planting 8.1! Tsuki Homer 10. Leak Detection Antenna Patent Applicant President of Automatic XL Casting Co., Ltd. Kiyoo Ishikawa Figure I Tomi 1 Figure Collection 2
Claims (1)
で浸食部を覆う如く炉壁中間部にセットしその下縁を可
塑性耐火物質で固定し、かつライニング用耐火物の漏洩
を防止することを特徴とした、低周波誘導溶解炉の炉修
方法。When repairing the lining of a low-frequency induction melting furnace, it is recommended to set a cylindrical formwork in the middle of the furnace wall so as to cover the eroded area, and fix the lower edge with a plastic refractory material to prevent leakage of the lining refractory. A method for repairing low-frequency induction melting furnaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4058689A JPH02219981A (en) | 1989-02-21 | 1989-02-21 | Method for repairing low frequency induction melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4058689A JPH02219981A (en) | 1989-02-21 | 1989-02-21 | Method for repairing low frequency induction melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02219981A true JPH02219981A (en) | 1990-09-03 |
Family
ID=12584604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4058689A Pending JPH02219981A (en) | 1989-02-21 | 1989-02-21 | Method for repairing low frequency induction melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02219981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411435A (en) * | 2013-07-24 | 2013-11-27 | 济南济钢铁合金厂 | Method for repairing furnace lining of intermediate frequency furnace used in steelmaking |
-
1989
- 1989-02-21 JP JP4058689A patent/JPH02219981A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411435A (en) * | 2013-07-24 | 2013-11-27 | 济南济钢铁合金厂 | Method for repairing furnace lining of intermediate frequency furnace used in steelmaking |
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