JPS62250112A - Gas blowing plug - Google Patents
Gas blowing plugInfo
- Publication number
- JPS62250112A JPS62250112A JP9385486A JP9385486A JPS62250112A JP S62250112 A JPS62250112 A JP S62250112A JP 9385486 A JP9385486 A JP 9385486A JP 9385486 A JP9385486 A JP 9385486A JP S62250112 A JPS62250112 A JP S62250112A
- Authority
- JP
- Japan
- Prior art keywords
- plug body
- plug
- refractory
- heat conduction
- disposed
- 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
- 238000007664 blowing Methods 0.000 title claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 65
- 229910052742 iron Inorganic materials 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 abstract description 12
- 230000006866 deterioration Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 239000011148 porous material Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、容器の底壁または側壁に取付けられ、容鼎内
の溶湯中にガスを吹込んで溶湯のガス撹拌等を行なうガ
ス吹込みプラグに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a gas injection plug that is attached to the bottom wall or side wall of a container and that blows gas into the molten metal in the container to stir the molten metal. Regarding.
（従来の技術）
この種ガス吹込みプラグにおいては、従来、耐火粒子相
互を少量の微粉で結合させたポーラスレンガを耐火物と
して用いたポーラスプラグが多用されていた。(Prior Art) In this type of gas injection plug, porous plugs using porous bricks, in which refractory particles are bonded to each other with a small amount of fine powder, are conventionally used as a refractory.
ところが、近年、耐用向上のために、第２図に示すよう
に、ち密質の耐火物に多数の貫通細孔１を形成してプラ
グ本体２を構成した貫通孔プラグが見直されるようにな
った。この貫通孔プラグのプラグ本体２を構成する耐火
物の材質としては、ＡＱ２０コーＣ，Ｍｇ０−Ｃ等の黒
鉛を含んだものが溶融金Ｉ２！（溶鋼）とのぬれ性に優
れている点（黒鉛は液体をはじき易い。）で注目されて
いる。However, in recent years, in order to improve durability, as shown in Figure 2, through-hole plugs in which the plug body 2 is formed by forming a large number of through-holes 1 in a dense refractory material have been reviewed. . The refractory material constituting the plug body 2 of this through-hole plug is molten gold I2!, which contains graphite such as AQ20 Co-C and Mg0-C. It is attracting attention for its excellent wettability with (molten steel) (graphite easily repels liquids).
（発明が解決しようとする問題点）
しかしながら、含炭素質の耐火物は熱伝導性が良いため
、プラグ使用時の赤熱度が高くなり、耐火物を囲む鉄皮
３，４の劣化、鉄皮３と鉄皮４との溶接部５の劣化、お
よび鉄皮４とガス導入管６との溶接部７の劣化が生じ易
く、その結果として、損耗により耐用が限られるのでは
なく、その鉄皮３，４からのガスリーク発生によって耐
用が限られていた。第３図に、ＶＡＤ （Ｖａｃｕｕａ
＋ ＡｒｃＤｅｇａｓｓｉｎｇ）操業の３チヤージ目に
生じた鉄皮劣化状態を示す。(Problem to be solved by the invention) However, since carbon-containing refractories have good thermal conductivity, the degree of redness increases when the plug is used, leading to deterioration of the iron shells 3 and 4 surrounding the refractory, and 3 and the steel shell 4, and the weld 7 between the steel shell 4 and the gas introduction pipe 6. Its service life was limited due to gas leaks from parts 3 and 4. Figure 3 shows the VAD (Vacuua
+ArcDegassing) Shows the state of deterioration of the iron shell that occurred during the third charge of operation.
そこで、第４図に示すように、含黒鉛耐火物（含炭素質
耐火物）に貫通細孔１１を形成してなるプラグ本体１２
の周側面部に八β２０３を９０％含むスリーブ状の耐火
物（低熱伝導性耐火物）１３を配設し、その周囲に鉄皮
１４，１５を設けた構成の貫通孔プラグが提案された。Therefore, as shown in FIG. 4, a plug body 12 is formed by forming through holes 11 in a graphite-containing refractory (carbon-containing refractory).
A through-hole plug has been proposed in which a sleeve-shaped refractory (low thermal conductivity refractory) 13 containing 90% of 8β203 is disposed on the peripheral side surface of the refractory, and iron skins 14 and 15 are provided around the sleeve-shaped refractory 13.
この貫通孔プラグにおいては、ＶＡＤ操業の４チヤージ
目にガスリークが生じた。また、その使用後量について
調べたところ、第２図に示すものと比較して、側面鉄皮
１４の酸化・劣化、側面鉄皮１４の頂部の溶損・亀裂に
ついては大幅に減少していたが、側面鉄皮１４と底面鉄
皮１５との溶接部１６、底面鉄皮１５とガス供給管１７
との溶接部１８の劣化により亀裂が生じ、また底面鉄皮
１５も酸化していた。なお、この使用後量を回収する時
、プラグ下部の押えレンガを外した時点での底面鉄皮１
５は完全に赤熱しており、その時点で８００℃以上であ
った。したがって、使用時は１１００℃以上であったと
推察される。In this through-hole plug, a gas leak occurred during the fourth charge of VAD operation. In addition, when we investigated the amount after use, we found that the oxidation and deterioration of the side iron skin 14 and the erosion and cracking of the top of the side iron skin 14 were significantly reduced compared to those shown in Figure 2. However, the welded part 16 between the side iron skin 14 and the bottom iron skin 15, the bottom iron skin 15 and the gas supply pipe 17
Deterioration of the welded part 18 caused cracks, and the bottom iron skin 15 was also oxidized. In addition, when collecting this amount after use, the bottom iron skin 1 at the time when the holding brick at the bottom of the plug is removed.
No. 5 was completely red hot and the temperature was 800° C. or higher at that point. Therefore, it is presumed that the temperature was 1100°C or higher during use.
本発明は前記事情にもとづいてなされたもので、その目
的とするところは、鉄皮の劣化・損傷を防止することが
できるガス吹込みプラグを提供することにある。The present invention was made based on the above-mentioned circumstances, and an object thereof is to provide a gas injection plug that can prevent deterioration and damage to the iron shell.
（問題点を解決するための手段）
本発明は、前記問題点を解決するために、下面側から上
面側に貫通する多数の貫通細孔を有した含炭素質耐火物
からなるプラグ本体の少なくとも下面側および側面側に
鉄皮を配設したガス吹込みプラグにおいて、前記鉄皮と
前記プラグ本体との間に、低熱伝導性耐火物からなる熱
伝導阻止部材を配設したことを特徴とするものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides at least one plug body made of a carbon-containing refractory having a large number of through holes penetrating from the lower surface side to the upper surface side. A gas blowing plug in which a steel shell is provided on the lower surface side and the side surface side, characterized in that a heat conduction blocking member made of a low thermal conductive refractory is disposed between the steel shell and the plug body. It is something.
（作用）
低熱伝導性耐火物からなる熱伝導阻止部材の介在によっ
て、熱伝導性の良い含炭素質耐火物からなるプラグ本体
からの熱を鉄皮に伝わり難くする。(Function) The interposition of the heat conduction blocking member made of a low heat conductive refractory makes it difficult for heat from the plug body made of a carbon-containing refractory with good heat conductivity to be transmitted to the iron skin.
（実施例）
以下、本発明の一実施例を第１図を参照しながら説明す
る。(Example) An example of the present invention will be described below with reference to FIG.
第１図中２１は底面側から上面側に貫通する多数の貫通
細孔２２を有した円錐台状のプラグ本体であり、このプ
ラグ本体２１は含炭素質耐火物で形成されている。この
プラグ本体２１の底面側および周側面側には低熱伝導性
耐火物からなる熱伝導阻止部材２３が配設されている。Reference numeral 21 in FIG. 1 is a truncated conical plug body having a large number of through holes 22 penetrating from the bottom side to the top side, and this plug body 21 is made of a carbonaceous refractory. A heat conduction blocking member 23 made of a low heat conductive refractory is disposed on the bottom side and the circumferential side of the plug body 21.
この熱伝導阻止部材２３は、１０００℃における熱伝導
率が２．５ｋｃａｌ／ ｍｈｒ’ｃ以下のものであり、
プラグ本体２１の底面側に配置される円錐台状の多孔質
耐火物２４と、プラグ本体２１の周側面側に配置される
スリーブ状のち密質耐火物２５とで構成されている。な
お、プラグ本体２１の底面とち密質耐火物２５の上面と
の間にはスペーサ２６が介在され、これにより均圧室２
７が形成されている。This heat conduction blocking member 23 has a thermal conductivity of 2.5 kcal/mhr'c or less at 1000°C,
It is composed of a truncated cone-shaped porous refractory 24 disposed on the bottom side of the plug body 21 and a sleeve-shaped dense refractory 25 disposed on the circumferential side of the plug body 21. Note that a spacer 26 is interposed between the bottom surface of the plug body 21 and the top surface of the dense refractory 25, so that the pressure equalization chamber 2
7 is formed.
また、熱伝導阻止部材２３の周側面側および底面側には
、シール鉄皮２８が配設されている。Further, a sealing iron skin 28 is provided on the circumferential side and the bottom side of the heat conduction blocking member 23.
このシール鉄皮２８は、熱伝導阻止部材２３０周ａ面側
に配設ざルる側面鉄皮２９と、熱伝導阻止部材２８の底
面側に配設される底面鉄皮３０とで構成され、側面鉄皮
２９と底面鉄皮３０とは溶接部３１により接合されてい
る。底面鉄皮３０は熱伝導阻止部材２３の底面から離間
して配設されており、これにより底面鉄皮３０と熱伝導
阻止部材２３の底面との間に均圧室３２が形成されてい
る。This seal skin 28 is composed of a side skin 29 disposed on the side a of the circumference of the heat conduction blocking member 230, and a bottom steel skin 30 disposed on the bottom side of the heat conduction blocking member 28. The side iron skin 29 and the bottom iron skin 30 are joined by a welded portion 31. The bottom iron skin 30 is arranged apart from the bottom surface of the heat conduction blocking member 23, thereby forming a pressure equalizing chamber 32 between the bottom iron skin 30 and the bottom surface of the heat conduction blocking member 23.
また、底面鉄皮３０には均圧室３２内にガスを導入する
ガス導入管３３が溶接部３４により接続されている。Further, a gas introduction pipe 33 for introducing gas into the pressure equalization chamber 32 is connected to the bottom iron skin 30 by a welded portion 34 .
このように構成されたガス吹込みプラグとしての貫通孔
プラグは取鍋の底壁あるいはＩｌｌ壁に取付けられ、ガ
ス導入！３３から均圧室３２内に吹込みガスが導入され
る。この導入されたガスは多孔質耐火物２４を通って均
圧室２７に導入され、ざらにプラグ本体２１の貫通細孔
２２を通うて取鋼内の溶鋼中に吹込まれ、これによって
ｍＭの撹拌等が行われる。The through-hole plug as a gas blowing plug configured in this way is attached to the bottom wall or Ill wall of the ladle, and gas is introduced! Blow gas is introduced into the pressure equalization chamber 32 from 33 . This introduced gas is introduced into the pressure equalization chamber 27 through the porous refractory 24, and is roughly blown into the molten steel in the tapped steel through the through holes 22 of the plug body 21, thereby stirring the mm. etc. will be carried out.
このプラグ使用状態においては、プラグ本体２１の先端
が溶鋼に接しているが、このプラグ本体２１は溶融金属
とのぬれ性に優れている含炭素質耐火物で形成されてい
るため、溶鋼をはじき易い。したがって、貫通細孔２２
に溶鋼が浸入して貫通細孔２２が閉塞されるということ
がない。When this plug is in use, the tip of the plug body 21 is in contact with the molten steel, but since the plug body 21 is made of a carbon-containing refractory that has excellent wettability with molten metal, it repels the molten steel. easy. Therefore, the through hole 22
There is no possibility that molten steel will infiltrate and block the through pores 22.
一方、プラグ本体２１の先端が溶鋼に接していることか
ら、溶鋼からの熱が熱伝導性の良い含炭素質耐火物から
なるプラグ本体２１に伝えられることになる。しかしな
がら、プラグ本体２１と鉄皮２８との間には、低熱伝導
性耐火物からなる熱伝導阻止部材２３が介在されている
ので、プラグ本体２１からの熱が鉄皮２８に伝わり難い
。したがって、鉄皮２８の劣化・損傷を防止することを
防止することができる。On the other hand, since the tip of the plug body 21 is in contact with the molten steel, heat from the molten steel is transferred to the plug body 21 made of a carbonaceous refractory with good thermal conductivity. However, since the heat conduction blocking member 23 made of a low thermally conductive refractory is interposed between the plug body 21 and the iron skin 28, the heat from the plug body 21 is difficult to be transmitted to the iron skin 28. Therefore, deterioration and damage to the iron skin 28 can be prevented.
次に実験例を説明する。Next, an experimental example will be explained.
（実験例１）
プラグ本体２１は、ＡＪ２２０３が７５％、Ｃが１５％
含有され、かつ１０００°Ｃにおける熱伝導率が１１．
０ｋｃａｌ／ｍｈｒ℃、高さが２０Ｏｎ＋ｍである耐火
物で、ち茫質耐火物２５は、Ａ２２０３が９０％含有さ
れ、かつ１０００℃における熱伝導率が１．８ｋｃａｌ
／”ｌｌｌｈｒ℃である耐火物で、
多孔質耐火物２４は、Ａ２２０３が９１％含有され、か
ツ１０００℃における熱伝導率が０．８ｋｃａ１７’ｍ
ｈｒ’ｃ高さが１００＋ｕである耐火物で、スペーサ２
６は、八２２０３が８５％含有され、かつ高さが３＋＋
＋ｓ＋である耐火モルタルで、側面鉄皮２９は、厚さ０
．８ｍｍの５ｔＪＳ３０４で、
底面鉄皮３ｏは、厚さ４．５ｍｍの５Ｓ４１で、溶接部
３１．３４の材質は、５ＵＳ３０９で、それぞれ構成し
たところ、ＶＡＤ （ｆｉ高温度１６２０℃、ガス吹込
み時間３０分）操業にて１０チヤージ使用可能であった
。この場合、ガスリークの発生はなく、回収時における
押えレンガを外したときの赤熱度は低く、６００〜７０
０℃と推察される。(Experiment Example 1) The plug body 21 is made of 75% AJ2203 and 15% C.
and has a thermal conductivity of 11.
A refractory with a temperature of 0 kcal/mhr°C and a height of 20 On+m, the somber refractory 25 contains 90% A2203 and has a thermal conductivity of 1.8 kcal at 1000°C.
Porous refractory 24 contains 91% A2203 and has a thermal conductivity of 0.8kca17'm at 1000℃.
Spacer 2 is made of refractory material with an hr'c height of 100+u.
6 contains 85% of 82203 and has a height of 3++
+s+ refractory mortar, side iron skin 29 has a thickness of 0
．． The bottom steel shell 3o was made of 5S41 with a thickness of 4.5mm, and the material of the welded part 31.34 was made of 5US309. 10 charges could be used during operation. In this case, there is no gas leak, and the degree of redness is low when the holding brick is removed during recovery, with a temperature of 600 to 70.
It is estimated to be 0℃.
また、プラグ本体２１の残存寸法は １８０＋１１０１
であった。Also, the remaining dimensions of the plug body 21 are 180+1101
Met.
（実験例２）
プラグ本体２１は、Ｍｇｏが７６％、Ｃ、Ｉ’）（１９
，５％含有され、かつ１０００℃における熱伝導率が１
３．０ｋｃａｌ、／ ｍｈｒ’Ｃ１高さが２００ｍｍで
ある耐火物で構成し、
ち密質耐火物２５は、Ａｊ２ｚＯ３が９６％含有され、
かつ１０００℃における熱伝導率が２．３ｋｃａｌ／ｍ
ｈ ｒ ’Ｃである耐火物であって、プラグ本体２１
の周面および多孔質耐火物２５の周面にパラフィンを薄
くコートしておき、これを中心体として外周部にキャス
タブルを流し込み、その後乾燥したものである。(Experiment Example 2) The plug body 21 contains 76% Mgo, C, I') (19
, 5%, and the thermal conductivity at 1000°C is 1.
3.0 kcal, / mhr'C1 It is composed of a refractory with a height of 200 mm, and the dense refractory 25 contains 96% Aj2zO3,
And the thermal conductivity at 1000℃ is 2.3kcal/m
The plug body 21 is a refractory which is h r 'C.
The peripheral surface of the porous refractory material 25 and the peripheral surface of the porous refractory material 25 are thinly coated with paraffin, and castable is poured around the outer periphery using this as a center body, followed by drying.
その他の多孔質耐火物２４、スペーサ２６、側面鉄皮２
９、底面鉄皮３０、溶接部３１．３４の材質、および使
用条件は実験例１と同様としたところ、プラグは使用後
も良好（プラグ本体２１の残存寸法２００ｍｍ ）であ
った。実験例１より若干鉄皮２８の劣化は大であったが
、更に２〜３チヤージは使用可能と思われた。Other porous refractories 24, spacers 26, side iron skins 2
9. The materials of the bottom iron skin 30, the welded parts 31 and 34, and the conditions of use were the same as in Experimental Example 1, and the plug remained in good condition even after use (the remaining size of the plug body 21 was 200 mm). Although the deterioration of the iron skin 28 was slightly greater than in Experimental Example 1, it seemed possible to use it for 2 to 3 more charges.
なお、実験例１、実験例２ともに細孔径は０．２ｍｍと
したが、予めプラグ本体２１の頂部も鉄皮（厚さ２ｎ＋
ｌｌ１）で囲うようにしたプラグにおいては、細孔径を
０．３ｍｍとしたところ、良好の結果が１ｑられた。こ
れは初期酸化を防ぐために行われたものであるが、結果
的に受鋼の際、溶鋼がこの頂部の鉄皮を溶かすのに熱を
とられ細孔へ入る溶鋼の粘性を高めたものと考えられる
。２チヤージ目以降は頂部を覆うように鉄板を２〜３枚
投入したところ、５チヤージまで使用することができた
。In addition, although the pore diameter was set to 0.2 mm in both Experimental Examples 1 and 2, the top of the plug body 21 was also made of iron skin (thickness 2n+
In the plug surrounded by ll1), good results were obtained when the pore diameter was set to 0.3 mm. This was done to prevent initial oxidation, but as a result, when receiving the steel, the molten steel was heated as it melted the iron skin at the top, increasing the viscosity of the molten steel entering the pores. Conceivable. After the 2nd charge, I put 2 to 3 iron plates to cover the top and was able to use it up to 5 charges.
（発明の効巣）
以上説明したように本発明によれば、底面側から上面側
に貫通する多数の貫通細孔を有した含炭素質耐火物から
なるプラグ本体と、このプラグ本体の少なくとも底面側
および側面側に配設される鉄皮と、この鉄皮と前記プラ
グ本体との間に介在される低熱伝導性耐火物からなる熱
伝導阻止部材とを具漏したから、低熱伝導性耐火物から
なる熱伝導阻止部材の介在によって、熱伝導性の良い含
炭素質耐火物からなるプラグ本体からの熱を鉄皮に伝わ
り難くすることができ、以て、鉄皮の劣化・損傷を防止
することができる等の優れた効果を奏する。(Effects of the Invention) As explained above, according to the present invention, there is provided a plug body made of a carbonaceous refractory having a large number of through holes penetrating from the bottom side to the top side, and at least the bottom side of the plug body. Since the iron skin disposed on the sides and the side surface side and the heat conduction blocking member made of a low thermal conductive refractory interposed between the iron skin and the plug body are omitted, the low thermal conductive refractory is By interposing the heat conduction blocking member made of a heat conduction prevention member, it is possible to make it difficult for the heat from the plug body made of a carbon-containing refractory with good thermal conductivity to be transmitted to the steel shell, thereby preventing deterioration and damage of the steel shell. It has excellent effects such as:
第１因は本発明の一実施例を示すガス吹込みプラグの断
面図、第２５ｉｉＩは従来のガス吹込みプラグを示す断
面図、第３図は従来のガス吹込みプラグの使用後の状態
を示す斜視図、第４図は本発明に先行して提案されたガ
ス吹込みプラグである。
２１・・・プラグ本体、２２・・・貫通細孔、２８・・
・鉄皮、２３・・・熱伝導阻止部材、２４・・・多孔質
耐火物、２５・・・ち密質耐火物。
出願人代理人 弁理士 鈴江武彦
第１図The first factor is a cross-sectional view of a gas blowing plug showing an embodiment of the present invention, No. 25iii is a cross-sectional view showing a conventional gas blowing plug, and Fig. 3 shows the state of the conventional gas blowing plug after use. The perspective view shown in FIG. 4 is a gas blowing plug proposed prior to the present invention. 21...Plug body, 22...Through hole, 28...
- Iron skin, 23... Heat conduction blocking member, 24... Porous refractory, 25... Dense refractory. Applicant's agent Patent attorney Takehiko Suzue Figure 1
Claims (3)
した含炭素質耐火物からなるプラグ本体と、このプラグ
本体の少なくとも底面側および側面側に配設される鉄皮
と、この鉄皮と前記プラグ本体との間に介在される低熱
伝導性耐火物からなる熱伝導阻止部材とを具備したこと
を特徴とするガス吹込みプラグ。(1) A plug body made of a carbonaceous refractory having a large number of through holes penetrating from the bottom side to the top side, an iron skin disposed at least on the bottom side and side sides of the plug body, and A gas injection plug comprising a heat conduction blocking member made of a low heat conductive refractory interposed between the iron shell and the plug body.
が２．５ｋｃａｌ／ｍｈｒ℃以下であることを特徴とす
る特許請求の範囲第１項記載のガス吹込みプラグ。(2) The gas blowing plug according to claim 1, wherein the heat conduction blocking member has a thermal conductivity of 2.5 kcal/mhr°C or less at 1000°C.
れる多孔質耐火物と、プラグ本体の側面側に配置される
ち密質耐火物とで構成したことを特徴とする特許請求の
範囲第１項記載のガス吹込みプラグ。(3) Claims characterized in that the heat conduction blocking member is composed of a porous refractory disposed on the bottom side of the plug body and a dense refractory disposed on the side surface side of the plug body. The gas injection plug described in item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9385486A JPS62250112A (en) | 1986-04-23 | 1986-04-23 | Gas blowing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9385486A JPS62250112A (en) | 1986-04-23 | 1986-04-23 | Gas blowing plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62250112A true JPS62250112A (en) | 1987-10-31 |
Family
ID=14094002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9385486A Pending JPS62250112A (en) | 1986-04-23 | 1986-04-23 | Gas blowing plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62250112A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05140662A (en) * | 1991-01-28 | 1993-06-08 | Tokyo Yogyo Co Ltd | Refractory for gas blowing |
| WO2004079019A3 (en) * | 2003-03-06 | 2004-11-11 | Techcom Imp Exp Gmbh | Gas bubbling element and corresponding gas bubbling system |
-
1986
- 1986-04-23 JP JP9385486A patent/JPS62250112A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05140662A (en) * | 1991-01-28 | 1993-06-08 | Tokyo Yogyo Co Ltd | Refractory for gas blowing |
| WO2004079019A3 (en) * | 2003-03-06 | 2004-11-11 | Techcom Imp Exp Gmbh | Gas bubbling element and corresponding gas bubbling system |
| JP2006519930A (en) * | 2003-03-06 | 2006-08-31 | テクコム・インポート・エクスポート・ゲーエムベーハー | Gas purging element (GASBUBLINGELEMENT) and corresponding gas purging system |
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