JPH037469B2 - - Google Patents
Info
- Publication number
- JPH037469B2 JPH037469B2 JP7696788A JP7696788A JPH037469B2 JP H037469 B2 JPH037469 B2 JP H037469B2 JP 7696788 A JP7696788 A JP 7696788A JP 7696788 A JP7696788 A JP 7696788A JP H037469 B2 JPH037469 B2 JP H037469B2
- Authority
- JP
- Japan
- Prior art keywords
- porous plug
- molten metal
- metal
- recess
- ladle
- 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
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は取鍋などの鋳造用溶湯容器内の溶湯中
に不活性ガスを導入するために容器底部に装着さ
れるポーラスプラグに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a porous plug attached to the bottom of a molten metal container for casting, such as a ladle, in order to introduce an inert gas into the molten metal in the container.
取鍋などの鋳造用溶湯容器の底部には溶湯中に
不活性ガスを導入して溶湯を撹拌し、脱ガスや溶
湯成分を調整するためにポーラスプラグが装着さ
れている。
A porous plug is attached to the bottom of a molten metal container for casting, such as a ladle, in order to introduce an inert gas into the molten metal, stir the molten metal, degas it, and adjust the molten metal components.
ところで、取鍋を多数回連続的に使用する場
合、鋳造終了後取鍋からスラグなどを排滓する。
この際、ポーラスプラグの溶湯との接触面には、
薄い地金やスラグが目詰まりの状態で残るので、
次回使用する前にこうした地金やスラグを除去す
る必要がある。このため、取鍋を所定の整備場へ
移動し、パイプから酸素を供給してポーラスプラ
グの保有熱で着火して地金がスラグを溶融又は剥
離させている（酸素洗浄）。 By the way, when the ladle is used continuously many times, slag and the like are removed from the ladle after casting is completed.
At this time, on the contact surface of the porous plug with the molten metal,
Thin metal and slag remain in a clogged state, so
These metals and slag must be removed before next use. For this reason, the ladle is moved to a predetermined maintenance facility, oxygen is supplied from a pipe, and the heat retained in the porous plug ignites it, causing the metal to melt or peel off the slag (oxygen cleaning).
しかし、スラグなどを排滓した後、取鍋整備場
に移動するまでの間にポーラスプラグ先端部の薄
い地金が冷却して黒色の地金となると、地金は赤
熱した状態でないと酸素と反応しないため、着火
不良となつて充分な酸素洗浄を行うことができな
い。このような着火不良は、特にポーラスプラグ
の使用回数が初回目から３回目ころまでで、溶損
が少ない場合に生じやすい。また、ポーラスプラ
グ側で燃焼するものが少ないと、酸素を供給する
ためのパイプが多く燃焼してしまい作業が困難に
なるという問題があつた。
However, after the slag etc. are discharged and before the ladle is moved to a repair shop, the thin metal at the tip of the porous plug cools and becomes black, and the metal must be in a red-hot state to absorb oxygen. Since it does not react, ignition failure occurs and sufficient oxygen cleaning cannot be performed. Such ignition failure is particularly likely to occur when the porous plug is used from the first to the third time and there is little melting damage. In addition, if there is little combustion on the porous plug side, there is a problem that a large amount of the pipe for supplying oxygen will be burned, making the work difficult.
本発明は上記問題点を解決するためになされた
ものであり、酸素洗浄の際に着火不良がなく、パ
イプの燃焼量を少なくすることができるポーラス
プラグを提供することを目的とする。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a porous plug that does not cause ignition failure during oxygen cleaning and can reduce the amount of combustion in a pipe.
本発明のポーラスプラグは、鋳造用溶湯容器内
の溶湯中に不活性ガスを導入するために容器底部
に装着されるポーラスプラグにおいて、ポーラス
プラグ本体の溶湯との接触面に地金を溜める凹部
を設けたことを特徴とするものである。
The porous plug of the present invention is a porous plug that is attached to the bottom of a molten metal container for introducing an inert gas into the molten metal in the casting container, and has a concave portion on the surface of the porous plug body that contacts the molten metal to collect metal. It is characterized by the fact that it has been provided.
本発明において、ポーラスプラグ本体の溶湯と
の接触面に設けられる凹部は、地金を溜めること
ができればよく、その形状は特に限定されるもの
ではない。例えば、開孔面における凹部の形状
は、円形、三角形、正方形、長方形、多角形、十
字形、星形などいずれでもよい。また、深さ方向
の凹部の形状については、一定の断面積を有する
ものでもよいし、断面積が深さに応じて変化する
ものでもよい。なお開孔部の大きさは20〜35mm、
深さは15〜20mmであることが望ましい。 In the present invention, the recess provided in the contact surface of the porous plug main body with the molten metal is not particularly limited in its shape as long as it can store the metal. For example, the shape of the recess on the aperture surface may be circular, triangular, square, rectangular, polygonal, cross-shaped, star-shaped, or the like. Furthermore, the shape of the recess in the depth direction may have a constant cross-sectional area, or may have a cross-sectional area that changes depending on the depth. The size of the opening is 20 to 35 mm.
It is desirable that the depth is 15-20 mm.
また、本発明においては、凹部に地金を溜めや
すくするために、凹部内にセラミツクフオームな
どを充填してもよい。 Further, in the present invention, the recess may be filled with ceramic foam or the like in order to facilitate the accumulation of metal in the recess.
このようなポーラスプラグによれば、溶湯との
接触面の凹部に地金が多く溜まるため、保有熱量
が多く、鋳込が終了してスラグなどを排滓した
後、取鍋整備場へ移動する間に急速に冷却するこ
とがない。また、凹部に地金が溜まることにより
熱伝導率が高くなるため、酸素洗浄の際に着火し
やすくなる。また、地金が燃焼するため、酸素を
供給するパイプの燃焼量は少なく、パイプを長い
状態で使用することができ、酸素洗浄作用が困難
になることはない。
According to such porous plugs, a large amount of metal accumulates in the recesses of the contact surface with the molten metal, so it retains a large amount of heat, and after casting is completed and slag etc. are removed, it is moved to a ladle maintenance shop. There is no rapid cooling in between. Furthermore, as the metal accumulates in the recesses, the thermal conductivity increases, making it easier to ignite during oxygen cleaning. Furthermore, since the bare metal is burned, the amount of combustion in the pipe supplying oxygen is small, and the pipe can be used in a long state, so that the oxygen cleaning effect is not difficult.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
電融アルミナ、電融ムライトにバインダーを添
加し、水を1.5〜2.0重量％加えて20分間混練し
た。この原料を地金を溜めるための凹部及び内部
ポーラスプラグに対応する凸部を有する金型に充
填し、フローテイング式自動オイルプレスにより
ポーラスプラグ本体を成形した。この成形体の水
分量が0.5％以下となるように、80〜120℃で12時
間以上乾燥した後、焼成してポーラスプラグ本体
を製造した。このポーラスプラグ本体にアルミナ
コート剤を塗布した。 A binder was added to fused alumina and fused mullite, 1.5 to 2.0% by weight of water was added, and the mixture was kneaded for 20 minutes. This raw material was filled into a mold having a concave portion for storing metal and a convex portion corresponding to the internal porous plug, and a porous plug body was formed using a floating automatic oil press. The molded body was dried at 80 to 120° C. for 12 hours or more so that the moisture content was 0.5% or less, and then fired to produce a porous plug body. An alumina coating agent was applied to the body of this porous plug.
なお、ポーラスプラグ本体を製造するにあたつ
ては、凹部と同一形状を有し、焼失性材料からな
る入れ子を作製しておき、この入れ子を金型内の
所定位置に設置し、原料を充填して入れ子ととも
に成形し、焼成時に消失させる方法を用いてもよ
い。 When manufacturing the porous plug body, a nest made of burnable material and having the same shape as the recess is prepared, and this nest is placed at a predetermined position in the mold and filled with raw material. Alternatively, a method may be used in which the resin is molded together with a nest and then disappeared during firing.
得られたポーラスプラグ本体１は第１図に示す
ように、底面の直径が138mm、上面の直径が90mm、
高さが350mmの円錐台形状をなし、その上面（溶
湯との接触面）には直径20mm、深さ15mmの地金を
溜めるための凹部２が、またその下面には内部ポ
ーラスプラグを取付けるための凹部３がそれぞれ
設けられている。 As shown in Figure 1, the obtained porous plug body 1 has a bottom diameter of 138 mm, a top diameter of 90 mm,
It has a truncated cone shape with a height of 350 mm, and the upper surface (the surface that contacts the molten metal) has a recess 2 with a diameter of 20 mm and a depth of 15 mm for storing metal, and the lower surface is for attaching an internal porous plug. recesses 3 are provided respectively.
このポーラスプラグ本体１の物性は、通気率２
cm3・cm／cm2・sec・cmH2O、見掛気孔率30.1％、
かさ比重2.51、圧縮強さ180Kgｆ／cm2、熱間線膨
張率（at1000℃）0.64％であつた。また、化学分
析値は、Al2O390.5％、SiO27％であつた。 The physical properties of this porous plug body 1 are as follows: air permeability 2
cm 3・cm/cm 2・sec・cmH 2 O, apparent porosity 30.1%,
The bulk specific gravity was 2.51, the compressive strength was 180 Kgf/cm 2 , and the coefficient of hot linear expansion (at 1000°C) was 0.64%. Further, chemical analysis values were 90.5% Al 2 O 3 and 7% SiO 2 .
次に、第２図に示すように、ポーラスプラグ本
体１に内部ポーラスプラグ４を取付け、アルミナ
モルタル（バインダーとしてリン酸アルミニウム
を添加）を介してガス吹込み管が設けられた鉄皮
５にセツトした。更に、緻密質の外周スリーブを
形成するために、アルミナセメントにリン酸ソー
ダ水溶液を６％添加し、オムニミキサーにて混練
した。この混練土を振動機により充填した後、バ
ツチ式マイクロ波乾燥装置により水和反応を促進
し、短時間で硬化させて外周スリーブ６を形成し
た。 Next, as shown in Fig. 2, the internal porous plug 4 is attached to the porous plug body 1, and set in the iron shell 5 provided with the gas blowing pipe via alumina mortar (aluminum phosphate is added as a binder). did. Furthermore, in order to form a dense outer peripheral sleeve, 6% aqueous sodium phosphate solution was added to the alumina cement, and the mixture was kneaded using an omnimixer. After this mixed soil was filled using a vibrator, the hydration reaction was promoted using a batch type microwave dryer and the mixture was hardened in a short time to form the outer circumferential sleeve 6.
実際に、第２図図示のポーラスプラグを装着し
た取鍋と、従来のポーラスプラグ（地金を溜める
ための凹部が設けられていないもの）を装着した
取鍋とをそれぞれ連続的に使用し、毎回の溶鋼鋳
込終了後の酸素洗浄時のポーラスプラグへの着火
状態を調べた。 In fact, a ladle equipped with the porous plug shown in Fig. 2 and a ladle equipped with a conventional porous plug (without a recess for storing metal) were used consecutively, respectively. The ignition status of the porous plug during oxygen cleaning after each molten steel pouring was investigated.
その結果、従来のポーラスプラグでは、使用初
回目から３回目までは着火不良が生じ、着火のた
めには種火が必要であつた。なお、４回目以降は
着火不良は生じなかつた。これに対して、第２図
図示のポーラスプラグでは、着火不良は全く生じ
なかつた。 As a result, with conventional porous plugs, ignition failure occurred from the first to the third use, and a pilot flame was required for ignition. Note that no ignition failure occurred after the fourth time. In contrast, with the porous plug shown in FIG. 2, no ignition failure occurred at all.
なお、本発明においては、凹部内に地金を溜め
やすくするために、第３図に示すように凹部内に
例えばセラミツクフオーム７を充填してもよい。 In the present invention, in order to facilitate the accumulation of metal in the recess, the recess may be filled with, for example, ceramic foam 7, as shown in FIG.
以上詳述したように本発明のポーラスプラグに
よれば、酸素洗浄の際に着火不良がなく、パイプ
の燃焼量を少なくすることができるなど顕著な効
果を奏するものである。
As detailed above, the porous plug of the present invention has remarkable effects such as no ignition failure during oxygen cleaning and the amount of combustion in the pipe can be reduced.
第１図は本発明の実施例におけるポーラスプラ
グ本体の斜視図、第２図は本発明の実施例におけ
るポーラスプラグの縦断面図、第３図は本発明の
他の実施例におけるポーラスプラグの縦断面図で
ある。
１……ポーラスプラグ本体、２……凹部、４…
…内部ポーラスプラグ、５……鉄皮、６……外周
スリーブ、７……セラミツクフオーム。
FIG. 1 is a perspective view of a porous plug main body in an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of a porous plug in an embodiment of the present invention, and FIG. 3 is a longitudinal cross-section of a porous plug in another embodiment of the present invention. It is a front view. 1...porous plug body, 2...recess, 4...
...Internal porous plug, 5...Iron skin, 6...Outer sleeve, 7...Ceramic foam.
Claims (1)
入するために容器底部に装着されるポーラスプラ
グにおいて、ポーラスプラグ本体の溶湯との接触
面に地金を溜める凹部を設けたことを特徴とする
ポーラスプラグ。1. A porous plug that is attached to the bottom of a molten metal container for introducing inert gas into the molten metal in a casting molten metal container, characterized in that a recessed portion for storing metal is provided on the surface of the porous plug body that comes in contact with the molten metal. porous plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7696788A JPH01249260A (en) | 1988-03-30 | 1988-03-30 | porous plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7696788A JPH01249260A (en) | 1988-03-30 | 1988-03-30 | porous plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01249260A JPH01249260A (en) | 1989-10-04 |
| JPH037469B2 true JPH037469B2 (en) | 1991-02-01 |
Family
ID=13620557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7696788A Granted JPH01249260A (en) | 1988-03-30 | 1988-03-30 | porous plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01249260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0266797A2 (en) | 1986-11-07 | 1988-05-11 | Fuji Photo Film Co., Ltd. | Method of processing silver halide color photographic material and photographic color developing composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0721561Y2 (en) * | 1989-12-27 | 1995-05-17 | 川崎炉材株式会社 | Gas blow plug |
| JP5225635B2 (en) * | 2007-08-23 | 2013-07-03 | 東京窯業株式会社 | Gas injection plug |
-
1988
- 1988-03-30 JP JP7696788A patent/JPH01249260A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0266797A2 (en) | 1986-11-07 | 1988-05-11 | Fuji Photo Film Co., Ltd. | Method of processing silver halide color photographic material and photographic color developing composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01249260A (en) | 1989-10-04 |
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