JPS62176668A - Erosion preventing method for refractory body at hot spot part of lf ladle - Google Patents
Erosion preventing method for refractory body at hot spot part of lf ladleInfo
- Publication number
- JPS62176668A JPS62176668A JP1794586A JP1794586A JPS62176668A JP S62176668 A JPS62176668 A JP S62176668A JP 1794586 A JP1794586 A JP 1794586A JP 1794586 A JP1794586 A JP 1794586A JP S62176668 A JPS62176668 A JP S62176668A
- Authority
- JP
- Japan
- Prior art keywords
- ladle
- slag
- refactory
- hot spot
- porous plug
- 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
- 238000000034 method Methods 0.000 title claims description 4
- 230000003628 erosive effect Effects 0.000 title abstract description 5
- 239000002893 slag Substances 0.000 claims abstract description 22
- 239000011261 inert gas Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims abstract description 4
- 239000011819 refractory material Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000007664 blowing Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は取鍋精錬に係り、特に取鍋のホットスポット部
耐火物の溶損を防止するのに好適な方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to ladle refining, and particularly to a method suitable for preventing melting loss of refractories at hot spots in a ladle.
従来取鍋精錬を行う際には、特開昭５０−４３３１１３
号公報に記載されているように、下部から不活性ガスを
吹込み、その攪拌力によりスラグの異常加熱を抑制し、
スラグライン部耐火物の溶損を防止してきたが、電極に
近い部分（アークスポット部）のスラグが局所的に高温
となったり、下部ポーラスの位置が偏芯している場合に
は、攪拌の不均一より反ポーラス側のスラグが局所的に
高温になり。Conventionally, when performing ladle refining, Japanese Patent Application Laid-Open No. 50-433113
As described in the publication, inert gas is blown from the bottom and its stirring power suppresses abnormal heating of the slag.
We have tried to prevent melting of the refractories in the slag line, but if the slag near the electrode (arc spot) becomes locally hot or if the lower porous position is eccentric, stirring may be difficult. The slag on the anti-porous side becomes locally hot due to the non-uniformity.
いわゆるホットスポット部の耐火物の溶損が著しいこと
が多かった。In many cases, the refractories in so-called hot spots suffered significant erosion.
［発明の目的〕
本発明の目的は、ホットスポット部のスラグライン耐火
物下方の側壁にポーラスプラグを設置し不活性ガスを吹
込むことにより、その攪拌力によりホットスポット部の
耐火物の溶損を防止する方法を提供することにある。[Object of the Invention] The object of the present invention is to install a porous plug on the side wall below the slag line refractories in the hot spot portion and blow inert gas, thereby preventing melting and damage of the refractory in the hot spot portion due to the stirring force. The purpose is to provide a method to prevent this.
ホットスポット部の溶損部止には、該部分のスラグが局
所的に高温となるのを防ぐことが効果的である。そこで
本発明では、ホットスポット部のスラグライン下方側壁
にポーラスプラグを設置し不活性ガスを吹込むことによ
り、ホットスポット部のスラグを十分攪拌させると同時
に、耐火物とスラグの接触面積を少なくさせ、耐火物の
溶損を防止するようにしたものである。In order to prevent melt damage in hot spot areas, it is effective to prevent the slag in these areas from becoming locally heated. Therefore, in the present invention, by installing a porous plug on the lower side wall of the slag line in the hot spot area and blowing inert gas into it, the slag in the hot spot area is sufficiently stirred, and at the same time, the contact area between the refractory and the slag is reduced. , which is designed to prevent melting and damage of refractories.
以下図面により本発明の一実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
図は本発明によるＬＦ取鍋の縦断面図である。The figure is a longitudinal cross-sectional view of an LF ladle according to the present invention.
ＬＦ取鍋１は耐火物２及びスラグライン用耐火物３で内
張されている。この取鍋内に溶１ｆＩ６とその上面にス
ラグ７が溶融しており、下部ポーラスプラグ５より不活
性ガスを吹込みながら電極４により加熱を行う。更にス
ラグライン耐火物３の下方の耐火物２中に側面よりポー
ラスプラグ８を設置し不活性ガスを吹込むことにより、
ポーラスプラグ８の上方ではスラグの攪拌が行われ、当
該部分のスラグライン用耐火物の溶損が防止される。The LF ladle 1 is lined with a refractory 2 and a slag line refractory 3. A melt 1fI6 and a slag 7 are melted on the upper surface of the ladle, and heating is performed by an electrode 4 while blowing an inert gas through a lower porous plug 5. Furthermore, by installing a porous plug 8 from the side into the refractory 2 below the slag line refractory 3 and blowing inert gas,
The slag is stirred above the porous plug 8 to prevent melting and loss of the slag line refractories in this area.
側面よりのポーラスプラグ８の径方向の設置位置は、電
極４の最至近距離部または下部ポーラス５の中心点をは
さんだ反対側の位置で、耐火物の溶損が大きいいわゆる
ホットスポット部の直下が望ましい。The radial installation position of the porous plug 8 from the side is the closest part of the electrode 4 or the opposite side of the center point of the lower porous 5, directly under the so-called hot spot where the refractory is severely damaged. is desirable.
本発明によれば、ＬＦ取鍋のホットスポット部の耐火物
の溶損が減少するので、従来２５回程度使用した後スラ
グライン部の耐火物を交換していたものが、３５回以上
使用可能となり、耐火物の寿命を大巾に延ばす効果があ
る。According to the present invention, since the erosion of the refractory in the hot spot part of the LF ladle is reduced, the refractory in the slag line part of the LF ladle, which had to be replaced after about 25 uses, can be used more than 35 times. This has the effect of greatly extending the life of refractories.
図は本発明によるＬＦ取鍋の縦断面図である。 The figure is a longitudinal cross-sectional view of an LF ladle according to the present invention.
Claims (1)
部下方側壁にポーラスプラグを設置し、加熱精錬中にそ
のポーラスプラグより不活性ガスを吹き込み攪拌するこ
とにより、ホットスポット部のスラグの局所的温度上昇
を抑制し、また耐火物とスラグの接触面積を少なくして
耐火物の溶損を防止することを特徴とするＬＦ取鍋のホ
ットスポット部耐火物の溶損防止法。1. In the LF ladle, a porous plug is installed on the side wall below the hot spot of the slag line, and during heating and refining, inert gas is blown through the porous plug and stirred, thereby increasing the local temperature of the slag at the hot spot. A method for preventing melting of refractories at hot spots of LF ladle, which is characterized by suppressing melting of refractories at hot spots of LF ladle and reducing the contact area between the refractories and slag to prevent melting of the refractories.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1794586A JPS62176668A (en) | 1986-01-31 | 1986-01-31 | Erosion preventing method for refractory body at hot spot part of lf ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1794586A JPS62176668A (en) | 1986-01-31 | 1986-01-31 | Erosion preventing method for refractory body at hot spot part of lf ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62176668A true JPS62176668A (en) | 1987-08-03 |
Family
ID=11957912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1794586A Pending JPS62176668A (en) | 1986-01-31 | 1986-01-31 | Erosion preventing method for refractory body at hot spot part of lf ladle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62176668A (en) |
-
1986
- 1986-01-31 JP JP1794586A patent/JPS62176668A/en active Pending
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