JPH0328485B2 - - Google Patents
Info
- Publication number
- JPH0328485B2 JPH0328485B2 JP28711386A JP28711386A JPH0328485B2 JP H0328485 B2 JPH0328485 B2 JP H0328485B2 JP 28711386 A JP28711386 A JP 28711386A JP 28711386 A JP28711386 A JP 28711386A JP H0328485 B2 JPH0328485 B2 JP H0328485B2
- Authority
- JP
- Japan
- Prior art keywords
- plug
- gas blowing
- gas
- brick
- graphite sheet
- 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
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、使用後の引き抜き脱却が容易にで
きるようにしたガス吹込用プラグのセツト方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for setting a gas blowing plug that can be easily pulled out and removed after use.
（従来の技術）
従来、溶融金属の撹拌、脱ガスあるいは非金属
介在物の除去にガス吹込用プラグが用いられてい
る。このガス吹込用プラグは、本体が多孔質、貫
通孔あるいはスリツトなどを設けた耐火物からな
つており、側壁には全体あるいは一部が鉄皮でお
おわれ、下部にはガス導入管が接続されている。
そして溶融金属用容器の底部あるいは側壁下部に
設けられた受レンガ、場合によつては受レンガの
内側に施工された受スリーブレンガ内に、耐火モ
ルタルを介在してセツトされていた。(Prior Art) Conventionally, a gas blowing plug has been used to stir molten metal, degas it, or remove nonmetallic inclusions. The main body of this gas blowing plug is porous and made of refractory material with through holes or slits, the side wall is entirely or partially covered with iron shell, and the gas introduction pipe is connected to the bottom. There is.
The molten metal is then set in a receiving brick provided at the bottom or lower side wall of the molten metal container, or in some cases in a receiving sleeve brick constructed inside the receiving brick, with refractory mortar interposed therebetween.
（発明が解決しようとする問題点）
この従来のセツト方法では、ガス吹込用プラグ
の耐用限界までの使用後における新品との取替
え、つまり引抜き作業に、耐火モルタルの接着性
が高温使用による焼結性増加で、強固になり、焼
き付くという現象が多くみられた。そのため、溶
融金属用容器の開口側からのドン突きによる方法
や強力な引抜き機の利用によらざるを得なく、そ
れだけに多くの作業時間や労力、コストなどを必
要としていた。(Problems to be Solved by the Invention) In this conventional setting method, when replacing a gas blowing plug with a new one after it has reached its service life limit, that is, when pulling it out, the adhesiveness of the refractory mortar is sintered due to high-temperature use. The phenomenon of becoming stronger and becoming burned-in was often observed as the temperature increased. Therefore, it is necessary to use a method of punching the molten metal container from the open side or use a powerful drawing machine, which requires a lot of work time, labor, and cost.
この発明は、従来の方法がもつ以上の問題点を
解消させ、引抜きが容易にできるようにしたガス
吹込用プラグのセツト方法を提供することを目的
とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a method for setting a gas blowing plug which eliminates the problems of the conventional method and allows easy removal.
（問題点を解決するための手段）
この目的を達成するために、この発明は次のよ
うな構成となつている。以下図面について説明す
る。(Means for Solving the Problems) In order to achieve this object, the present invention has the following configuration. The drawings will be explained below.
すなわち、ガス吹込用プラグ１０と受レンガ４
０［受スリーブレンガ４１も含む］とのセツト構
造で、ガス吹込用プラグ１０の耐用限界位置より
下のか所に、主原料として天然黒鉛を用い、その
天然黒鉛を酸処理して急熱、膨脹させて圧縮成形
して得られるところの黒鉛シート２０を装着介在
させることによつてなされている。なお黒鉛シー
ト２０の装着あるいは介在方法は、あらかじめガ
ス吹込用プラグ１０の外面あるいは受レンガ４０
の内面に接着材などで装着一体化したものを用い
る方法や、使用現場において、はめ合わせてセツ
トする方法がある。 That is, the gas blowing plug 10 and the receiving brick 4
0 [including the receiving sleeve brick 41], natural graphite is used as the main raw material at a location below the service life limit position of the gas injection plug 10, and the natural graphite is treated with acid to rapidly heat and expand. This is accomplished by attaching and interposing a graphite sheet 20 obtained by compression molding. Note that the graphite sheet 20 is attached or interposed in advance on the outer surface of the gas blowing plug 10 or on the receiving brick 40.
There are two methods: one is to use an adhesive that is attached to the inner surface of the container, and the other is to fit and set it at the site of use.
この発明は、黒鉛シート２０が耐火モルタル３
０の焼付き現象を阻害するのを応用したものであ
る。なお装着介在位置の限定理由は、耐用限界以
上の位置にセツトすると、ガス吹込用プラグ１０
の溶損とともに黒鉛シート２０も溶融金属との接
触が起こり、酸化等によつて消失したり、多数回
使用時の酸洗作業により溶融金属の侵入を許すと
いう支障をきたすことになる。 In this invention, the graphite sheet 20 is a refractory mortar 3.
This is an application of inhibiting the 0 burn-in phenomenon. The reason for the limitation of the installation position is that if it is set at a position exceeding the service life limit, the gas blowing plug 10
At the same time as the graphite sheet 20 comes into contact with the molten metal, it may disappear due to oxidation or the like, or the molten metal may enter the graphite sheet 20 during the pickling process when used many times.
実施例 １
この発明の第１実施例を第１図を参照しながら
説明する。ガス吹込用プラグ１０は高アルミナ多
孔質耐火物で上径φ66mm、下径φ133mm、高さ200
mmの寸法で、1.2mmの鉄皮１１で包囲し、下部に
ガス導入パイプ１２を接続してなるもので、この
ガス吹込用プラグ１０の外側壁部に、耐用限界位
置Ｈ（100mm）に合わせて、上から100mm〜200mmの
間に、0.3mm厚みの100％の膨脹黒鉛よりなる黒鉛
シート２０を接着材にて貼り付けた。この黒鉛シ
ート２０付きのガス吹込用プラグ１０を50トン
VOD用取鍋の敷レンガ５０の内部に施工された
受レンガ４０に耐火モルタル３０を塗布してセツ
トした。Example 1 A first example of the present invention will be described with reference to FIG. The gas injection plug 10 is made of high alumina porous refractory material with an upper diameter of 66 mm, a lower diameter of 133 mm, and a height of 200 mm.
mm in size, it is surrounded by a 1.2 mm steel shell 11, and a gas introduction pipe 12 is connected to the bottom of the gas injection plug 10. Then, a graphite sheet 20 made of 100% expanded graphite and having a thickness of 0.3 mm was attached between 100 mm and 200 mm from the top using an adhesive. 50 tons of this gas blowing plug 10 with graphite sheet 20
Refractory mortar 30 was applied to the receiving brick 40 constructed inside the paving brick 50 of the VOD ladle and set.
取鍋精錬は、温度1680℃、１回平均処理時間
390分を２回処理して本来の耐用限界を超えた。
そこで取替作業を、ガス導入用パイプ１２を持つ
て人力によつて引つぱつたところ、残厚95mmで引
抜きができた。 Ladle refining is performed at a temperature of 1680℃ and an average processing time of one time.
After 390 minutes of treatment twice, the original durability limit was exceeded.
Therefore, when we carried out the replacement work by holding the gas introduction pipe 12 and pulling it out manually, we were able to pull it out with a remaining thickness of 95 mm.
実施例 ２
この発明の第２実施例を第２図を参照しながら
説明する。ガス吹込用プラグ１０は、Al2O392
％、SiO23％、Cr2O33％の組成を有する材質で、
0.6mmφの細貫通孔を利用してガス吹きをするも
ので、外壁は鉄皮１１で包囲し、ガス導入用パイ
プ１２を接続して寸法は上径90mm、下径150mm、
高さ262mmなるものである。Embodiment 2 A second embodiment of the present invention will be described with reference to FIG. The gas blowing plug 10 is made of Al 2 O 3 92
%, SiO 2 3%, Cr 2 O 3 3%,
Gas is blown using a small through hole of 0.6 mmφ, and the outer wall is surrounded by a steel skin 11 and a gas introduction pipe 12 is connected to it, and the dimensions are 90 mm in upper diameter, 150 mm in lower diameter,
The height is 262mm.
そしてこの方法は120トンLF用取鍋の敷レンガ
５０受レンガ４０の中に施工された受スリーブレ
ンガ４１の内面に、酸化処理黒鉛80％にアルミナ
粉20％の混合物を成形してなる黒鉛シート２０
を、この場合の耐用限界高さH2（130mm）に合わ
せて、厚さ１mm品を貼り付けた。次にガス吹込用
プラグ１０の外周に、耐火モルタル３０を塗布し
て挿入セツトした。 And this method is a graphite sheet made by molding a mixture of 80% oxidized graphite and 20% alumina powder on the inner surface of the receiving sleeve brick 41 constructed in the paving brick 50 and receiving brick 40 of the ladle for 120 tons LF. 20
A 1 mm thick product was attached to match the serviceable height H 2 (130 mm) in this case. Next, refractory mortar 30 was applied to the outer periphery of the gas blowing plug 10, and the plug was inserted and set.
LF取鍋精錬は、温度1630℃、平均処理時間50
分を４回処理して耐用限界に至つた。そこで取替
作業をガス導入用パイプ１２を簡易式引抜機で引
張つたところ、残厚140mmで容易に引抜きができ
た。 LF ladle refining has a temperature of 1630℃ and an average processing time of 50
After 4 treatments, it reached its end of life. Therefore, the replacement work was carried out by pulling the gas introduction pipe 12 using a simple drawing machine, and it was easily pulled out with a remaining thickness of 140 mm.
（発明の効果）
この発明によるガス吹込用プラグのセツト方法
では、耐用限界を過ぎた使用後の引抜き作業は実
施例ではいずれもドン突きや大型引抜き機を利用
することなく、人力あるいは簡易引抜き機で簡単
にできた。またガス吹込用プラグの耐用限界に至
らない時点での引抜き作業の必要な場合でも、従
来の焼結力を少なくとも耐用限界位置以下では、
黒鉛シートの介在分が緩和することになるもの
で、この発明は産業上優れた効果をもたらすもの
である。(Effects of the Invention) In the method for setting a gas blowing plug according to the present invention, the pulling operation after use beyond the service life limit is performed manually or by simple pulling without using a hammer or a large pulling machine. It was easy to do. In addition, even if it is necessary to pull out the gas blowing plug before it reaches its service life limit, the conventional sintering force can be kept at least below the service life limit position.
Since the intervening portion of the graphite sheet is relaxed, this invention brings about excellent industrial effects.
第１図はこの発明の第１実施例を示す縦断面
図、第２図は同第２実施例を示す縦断面図であ
る。
１０……ガス吹込用プラグ、１１……鉄皮、１
２……ガス導入用パイプ、２０……黒鉛シート、
３０……耐火モルタル、４０……受レンガ、４１
……受スリーブレンガ、５０……敷レンガ。
FIG. 1 is a longitudinal sectional view showing a first embodiment of the invention, and FIG. 2 is a longitudinal sectional view showing the second embodiment. 10...Plug for gas blowing, 11...Iron shell, 1
2... Gas introduction pipe, 20... Graphite sheet,
30... Fireproof mortar, 40... Brickwork, 41
...Sleeve brick, 50...Slab brick.
Claims (1)
にてセツトする方法において、ガス吹込用プラグ
の耐用限界位置以下で、ガス吹込用プラグあるい
は受レンガの側壁部に、黒鉛シートを装着してな
ることを特徴とするガス吹込用プラグのセツト方
法。1. In the method of setting a gas injection plug to a receiving brick with refractory mortar, it is necessary to attach a graphite sheet to the side wall of the gas injection plug or receiving brick below the service life limit position of the gas injection plug. Features: How to set a gas blowing plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28711386A JPS63140028A (en) | 1986-12-02 | 1986-12-02 | Setting method for plug for gas blowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28711386A JPS63140028A (en) | 1986-12-02 | 1986-12-02 | Setting method for plug for gas blowing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63140028A JPS63140028A (en) | 1988-06-11 |
| JPH0328485B2 true JPH0328485B2 (en) | 1991-04-19 |
Family
ID=17713228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28711386A Granted JPS63140028A (en) | 1986-12-02 | 1986-12-02 | Setting method for plug for gas blowing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63140028A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2690500B2 (en) * | 1988-04-27 | 1997-12-10 | 黒崎窯業株式会社 | How to install a refractory block |
| CH699948A2 (en) * | 2008-11-17 | 2010-05-31 | Stopinc Ag | Container for molten metal, and a method for an interchangeable connection of a refractory porous plug or a refractory sleeve. |
-
1986
- 1986-12-02 JP JP28711386A patent/JPS63140028A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63140028A (en) | 1988-06-11 |
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