JPH0735291B2 - Porous plug for blowing gas - Google Patents
Porous plug for blowing gasInfo
- Publication number
- JPH0735291B2 JPH0735291B2 JP1332856A JP33285689A JPH0735291B2 JP H0735291 B2 JPH0735291 B2 JP H0735291B2 JP 1332856 A JP1332856 A JP 1332856A JP 33285689 A JP33285689 A JP 33285689A JP H0735291 B2 JPH0735291 B2 JP H0735291B2
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- porous
- carbon
- gas
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、耐用性に優れたガス吹き込み用ポーラスプラ
グに関するものである。TECHNICAL FIELD The present invention relates to a gas-blowing porous plug having excellent durability.
溶融金属の温度調整・成分の均一化・非金属介在物の除
去などを目的として、溶融金属に不活性ガスを吹き込む
ことが行われている。これに使用されるガス吹き込み用
ポーラスプラグは、図に示すとおりガス透過性のポーラ
ス質耐火物１と、緻密質耐火物よりなる外周耐火物２か
ら構成される。例えば、特開昭49-97705号公報、実開昭
52-127010号公報、実開昭57-122751号公報、実開昭59-4
7647号公報などに見られるとおりである。BACKGROUND ART An inert gas is blown into a molten metal for the purpose of adjusting the temperature of the molten metal, homogenizing the components, removing non-metallic inclusions, and the like. The gas-blowing porous plug used for this is composed of a gas-permeable porous refractory 1 and a peripheral refractory 2 made of a dense refractory as shown in the figure. For example, Japanese Patent Laid-Open No. 49-97705 and Shokai Sho
No. 52-127010, No. 57-122751, No. 59-4
As seen in the 7647 publication.
その材質は、ポーラス質耐火物１、外周の緻密質耐火物
２ともに、アルミナ質、ムライト質、マグネシア質、ス
ピネル質などが一般的である。また、特開昭55-18556号
公報には、カーボン含有耐火物が提案されている。The material is generally alumina, mullite, magnesia, spinel, etc. for both the porous refractory 1 and the dense refractory 2 on the periphery. Further, JP-A-55-18556 proposes a carbon-containing refractory material.
ポーラス質耐火物は、ガス噴出で溶鋼・スラグの浸透が
防止されることに加え、材質改善によって、ポーラス質
にもかかわらず、最近では外周耐火物より耐食性が優れ
るようになった。外周耐火物は、ポーラス質耐火物を包
囲して周囲からのガス漏れを防止する役割と、ポーラス
耐火物および羽口れんがの保護的役割を持つが、ポーラ
ス耐火物より先に溶損されることで、その効果が十分に
発揮されていない。Porous refractories, in addition to preventing permeation of molten steel and slag by gas injection, have recently become better in corrosion resistance than peripheral refractories despite their porous nature. The outer peripheral refractory has a role of surrounding the porous refractory and preventing gas leakage from the surroundings, and a protective role of the porous refractory and tuyere brick, but it is melted before the porous refractory. However, the effect is not fully exerted.
そこで、外周耐火物の組織の緻密化が図られている。し
かし、組織の緻密化は耐スポーリング性を低下させ、ハ
クリによる損耗やキレツ発生により、羽口れんがおよび
ポーラス耐火物の損傷をきたすだけでなく、ガス漏れを
招く。Therefore, the structure of the outer peripheral refractory is densified. However, the densification of the structure lowers the spalling resistance, and not only the tuyere brick and the porous refractory are damaged due to wear and cracks caused by peeling, but also gas leakage is caused.
また、ポーラスプラグを溶融金属容器にセットした場
合、従来のポーラスプラグはその周囲れんがと融着しや
すい欠点がある。このため、ポーラスプラグの交換作業
に時間を要し、溶鋼容器の稼働率低下の一因となってい
た。Further, when the porous plug is set in a molten metal container, the conventional porous plug has a drawback that it is easily fused with the surrounding bricks. For this reason, it takes a long time to replace the porous plug, which is one of the causes of lowering the operating rate of the molten steel container.
本発明は、以上の欠点を解決したポーラスプラグを提供
すること目的としている。An object of the present invention is to provide a porous plug that solves the above drawbacks.
本発明は、重量割合で、カーボン１〜40％、残部が耐火
性骨材を主材とした配合物よりなる焼成または不焼成の
カーボン含有耐火物を外周耐火物とし、その内部にガス
透過性のポーラス質耐火物を設けたガス吹き込み用ポー
ラスプラグである。The present invention is a peripheral or refractory carbon-containing refractory which is a fired or non-fired carbon-containing refractory consisting of a composition containing 1 to 40% by weight of carbon and the remainder being refractory aggregate as a main material. Is a porous plug for gas injection provided with a porous refractory material.
本発明において、ポーラスプラグの中央部分に設けるポ
ーラス質耐火物は従来材質と特に変わりない。本発明は
このポーラス質耐火物と、外周耐火物として使用するカ
ーボン含有耐火物との組合せに特徴がある。In the present invention, the porous refractory provided in the central portion of the porous plug is not different from conventional materials. The present invention is characterized by a combination of this porous refractory and a carbon-containing refractory used as a peripheral refractory.
カーボン含有耐火物は、カーボンによる作用によって耐
食性および耐スポーリング性が向上し、外周耐火物とし
てガス漏れ防止の効果をいかんなく発揮することができ
る。The carbon-containing refractory has improved corrosion resistance and spalling resistance due to the action of carbon, and can exert the effect of preventing gas leakage as an outer peripheral refractory.
前記のとおり、ポーラスプラグの材質として、カーボン
含有耐火物が特開昭55-18556号公報によって既に公知で
ある。しかし、同公報でのカーボン含有耐火物は本発明
のように外周耐火物ではなく、ポーラス質耐火物として
の材質である。As described above, as a material for the porous plug, a carbon-containing refractory material is already known from Japanese Patent Laid-Open No. 55-18556. However, the carbon-containing refractory in the publication is not a peripheral refractory as in the present invention but a material as a porous refractory.
ポーラス質耐火物はカーボンの含有によって耐食性が向
上する反面、ガス透過性に劣る。これは、カーボンの粒
子表面の摩擦係数が小さいために成形物の充填性が増
し、耐火物組織が緻密化するためである。また、カーボ
ン原料には純度の高いりん状黒鉛が使用されることが多
いが、りん状黒鉛は偏平状であり、ガス透過阻止の遮断
壁として作用する。また、カーボンの酸化防止にSiなど
の金属粉が添加されることがあるが、これが金属炭化物
を生成して耐火物組織を緻密化し、ガス透過性をさらに
低下させる。Porous refractory has improved corrosion resistance due to the inclusion of carbon, but has poor gas permeability. This is because the carbon particles have a small friction coefficient on the surface of the particles, so that the filling property of the molded product is increased and the refractory structure is densified. Highly pure phosphorus-like graphite is often used as the carbon raw material, but the phosphorus-like graphite is flat and acts as a barrier for gas permeation. In addition, a metal powder such as Si may be added to prevent carbon from being oxidized, but this forms metal carbide to densify the refractory structure and further reduce gas permeability.
これに対し本発明は、ポーラス質耐火物にカーボンを含
有させず、外周耐火物にカーボン含有耐火物を使用した
もので、ポーラスプラグとしてのガス透過性を低下させ
ることがない。また、外周耐火物に含有されるカーボン
が溶鋼・スラグに濡れ難く、しかも反応性がきわめて低
いことで、ポーラスプラグはその周囲れんがとの融着が
防止され、ポーラスプラグの交換が容易となる。On the other hand, according to the present invention, the porous refractory does not contain carbon and the outer refractory uses carbon-containing refractory, so that the gas permeability of the porous plug is not lowered. Further, since the carbon contained in the outer peripheral refractory is difficult to wet the molten steel and the slag, and the reactivity is extremely low, the porous plug is prevented from being fused with the surrounding brick, and the porous plug can be easily replaced.
さらに、外周耐火物にカーボン含有耐火物を使用したこ
とで、ガス漏れ防止にきわめて効果的なものとなる。こ
れはカーボン含有耐火物が耐食性、耐スポール性に優れ
ているだけではなく、カーボン含有によって耐火組織が
緻密化すること、およびカーボン含有耐火物の熱膨張が
小さいためにその内部に位置するポーラス質耐火物の膨
張を受けとめて、その両者間の接合部に隙間が生じ難い
ことにある。Furthermore, the use of carbon-containing refractory as the outer peripheral refractory makes it extremely effective in preventing gas leakage. This is because not only the carbon-containing refractory is excellent in corrosion resistance and spall resistance, but also because the refractory structure is densified due to the carbon-containing refractory and the thermal expansion of the carbon-containing refractory is small, the porous material located inside it This is because it is difficult to form a gap in the joint portion between the refractory and the refractory due to the expansion.
外周耐火物としてのカーボン含有耐火物は、重量割合で
カーボン１〜40％、残部が耐火性骨材を主材とした配合
物より製造される。カーボンの具体例は、りん状黒鉛、
土状黒鉛、ピッチコークス、カーボンブラック、キッシ
ュグラファイトなどから選ばれる一種または二種以上と
する。中でも黒鉛度が高く、高耐食性のりん状黒鉛が好
ましい。カーボンの割合は、１％未満では耐食性、耐ス
ポーリング性および融着防止に効果がなく、40％を超え
ると耐酸化性の面から好ましくない。The carbon-containing refractory material as the outer peripheral refractory material is produced from a composition containing 1 to 40% by weight of carbon and the balance being refractory aggregate. Specific examples of carbon include phosphorous graphite,
One or more selected from earth graphite, pitch coke, carbon black, quiche graphite and the like. Among them, phosphorous graphite having a high degree of graphitization and high corrosion resistance is preferable. If the carbon content is less than 1%, it is not effective in corrosion resistance, spalling resistance and fusion prevention, and if it exceeds 40%, it is not preferable in terms of oxidation resistance.
残部を占める耐火性骨材は、焼結または電融のマグネシ
ア、アルミナ、スピネル（MgO・Al2O3）などから選ばれ
る一種または二種以上が好ましい。また、必要により、
酸化防止、焼結促進などを目的として、クロム鉱、炭化
物、珪化物、ほう化物、粘土、金属粉などから選ばれる
一種または二種以上を適当量添加してもよい。The refractory aggregate occupying the balance is preferably one or more selected from sintered or electro-fused magnesia, alumina, spinel (MgO.Al 2 O 3 ), and the like. Also, if necessary,
An appropriate amount of one or more selected from chromium ore, carbides, silicides, borides, clays, metal powders and the like may be added for the purpose of preventing oxidation and promoting sintering.
金属シリコンおよびまたは金属アルミニウムなどの金属
粉を外掛け１〜10％添加すると、これらが金属炭化物を
生成して外周耐火物のガス透過性がさらに低下し、ガス
漏れ防止が一層効果的なものとなる。When metallic powder such as metallic silicon and / or metallic aluminum is added to the outer portion of 1 to 10%, metal carbides are generated, and the gas permeability of the outer peripheral refractory is further reduced, and gas leakage prevention is more effective. Become.
外周耐火物の製造は、以上の配合物にピッチ、樹脂など
の結合剤を外掛けで２〜５％程度添加し、混練後、外周
耐火物の形状である筒状に成形する。To manufacture the outer peripheral refractory, a binder such as pitch or resin is added to the above-mentioned compound by about 2 to 5% by external coating, and after kneading, the peripheral refractory is formed into a tubular shape.
外周耐火物を不焼成品にする場合、例えば500℃以下の
温度で乾燥する。焼成品にする場合は、例えば800〜120
0℃程度の温度で焼成する。この焼成には、酸化防止の
ためにコークスブリーズを用いたサヤ詰め、あるいは炉
内へ不活性ガスを導入するなどの還元雰囲気下で行うの
が好ましい。When the peripheral refractory is made into a non-fired product, it is dried at a temperature of 500 ° C. or lower, for example. When making a baked product, for example, 800 to 120
Bake at a temperature of about 0 ° C. It is preferable that this firing is carried out in a reducing atmosphere such as filling with a sheath using a coke breeze to prevent oxidation or introducing an inert gas into the furnace.
ポーラス質耐火物の製造において、ガス流通路の形成は
従来方法と変わりない。例えば、耐火性骨材の中間粒径
の粒子を除いて粒子間の空隙をガス流通路にする方法、
有機質繊維を混入しておき、耐火物の焼成時の加熱で有
機質繊維を焼失させてガス流通路を形成する方法あるい
は可燃物の消失によるスリット状のガス流通路を形成す
る方法などがある。なお、耐火性骨材の中間粒径の粒子
を除いて製造する場合は、球状の耐火性骨材を用いると
ガス透過性がより大きなものとなる。In the production of porous refractories, the formation of gas flow passages is no different from conventional methods. For example, a method of removing the medium-sized particles of the refractory aggregate to make the voids between the particles a gas flow path,
There is a method of mixing organic fibers and burning the refractory to burn off the organic fibers to form a gas flow passage, or a method of forming a slit-shaped gas flow passage due to the disappearance of combustible substances. When the refractory aggregate is manufactured by removing particles having an intermediate particle diameter, the gas permeability is further increased by using the spherical refractory aggregate.
ポーラス質耐火物は、材質的には耐食性と耐スポーリン
グ性を兼ね備えたアルミナ質の焼成品が最も好ましい
が、他にもマグネシア質、スピネル質、ムライト質、ジ
ルコン質、ジルコニア質などがある。The porous refractory material is most preferably an alumina fired product having both corrosion resistance and spalling resistance, but other materials include magnesia, spinel, mullite, zircon, and zirconia.
本発明では、カーボン含有耐火物よりなる外周耐火物の
内部に前記ポーラス質耐火物を設けたことで、仮りにポ
ーラス質耐火物にキレツが生じても、そのキレツが外周
耐火物に伝播せず、ガス漏れ防止により優れた効果があ
る。In the present invention, by providing the porous refractory inside the outer refractory made of carbon-containing refractory, even if a break occurs in the porous refractory, the break does not propagate to the outer refractory. Also, it has an excellent effect in preventing gas leakage.
外周耐火物とポーラス質耐火物との間にはモルタルを介
在することが好ましい。また、外周耐火物の側面は、溶
融金属容器へセットしやすくするために図のようにテー
パーを設け、ポーラスプラグ全体の形状を截円錐形にす
る。ポーラス耐火物の形状は限定されないが、ポーラス
プラグを溶融金属容器に実際にセットする場合には、図
のように側面および下面をメタルケース３で覆うと共
に、メタルケース３の下面にガス導入管４を接続する。
ポーラス耐火物１とメタルケース３との間には、不活性
ガスがポーラス質耐火物１の下面全体から導入するよう
に、空隙５を設けておくことが好ましい。また、外周耐
火物とメタルケースを同時に成形すると両者の密着性が
増し、ガス漏れ防止に効果的である。It is preferable to interpose mortar between the peripheral refractory material and the porous refractory material. In addition, the side surface of the outer peripheral refractory is provided with a taper to facilitate setting in the molten metal container, and the overall shape of the porous plug is a truncated cone shape. The shape of the porous refractory is not limited, but when the porous plug is actually set in the molten metal container, the side surface and the lower surface are covered with the metal case 3 as shown in the figure, and the gas introduction pipe 4 is provided on the lower surface of the metal case 3. Connect.
A void 5 is preferably provided between the porous refractory 1 and the metal case 3 so that the inert gas is introduced from the entire lower surface of the porous refractory 1. Further, if the outer peripheral refractory and the metal case are molded at the same time, the adhesion between them is increased, which is effective in preventing gas leakage.
耐火物部分を底面φ220mm、上面φ165mm、高さ200mmの
截円錐台形とし、そのうち外周耐火物の厚さを35mmにし
たポーラスプラグにおいて、本発明実施例とその比較例
を第１表に示す。ポーラス質耐火物は、アルミナ質（通
気率1.0cc・cm/cm2・sec・cm・H2O）またはマグネシア
質（通気率0.96cc・cm/cm2・sec・cm・H2O）の焼成品と
した。Table 1 shows Examples and Comparative Examples of the present invention in a porous plug in which the refractory portion has a truncated cone shape with a bottom surface of 220 mm, a top surface of 165 mm, and a height of 200 mm, of which the outer peripheral refractory material has a thickness of 35 mm. Porous refractories are made of alumina (air permeability 1.0 cc · cm / cm 2 · sec · cm · H 2 O) or magnesia (air permeability 0.96 cc · cm / cm 2 · sec · cm · H 2 O) It was a baked product.
また、実機試験では図に示すようにメタルケースおよび
ガス導入管を取り付けた後、300屯の溶鋼取鍋に装着し
て試験した。試験結果を第２表に示す。Also, in the actual machine test, after mounting the metal case and the gas introduction pipe as shown in the figure, the test was carried out by mounting it on a molten steel ladle of 300 tons. The test results are shown in Table 2.
実施例１〜13および比較例14,15 不焼成品の外周耐火物は、第１表に示す配合物をミキサ
ーで25分間混練した後、300屯フリクションプレスにて
成形し、ついで150℃×16時間の加熱乾燥を行った。Examples 1 to 13 and Comparative Examples 14 and 15 Non-fired peripheral refractories were obtained by kneading the compounds shown in Table 1 with a mixer for 25 minutes, molding them with a 300 ton friction press, and then 150 ° C. × 16. Heat drying was performed for an hour.
焼成品は、さらにこれを還元雰囲気下で1000℃×６時間
の焼成を行った。The calcined product was further calcined at 1000 ° C. for 6 hours in a reducing atmosphere.
比較例16 ポーラス質耐火物の外周に第１表に示す配合物組織のキ
ャスタブル耐火物を鋳込み成形した。乾燥は、250℃×1
0時間で行った。Comparative Example 16 A castable refractory having the composition of the composition shown in Table 1 was cast around the outer periphery of the porous refractory. 250 ° C x 1 for drying
It went in 0 hours.
本発明の実施例より得られたポーラスプラグは、いずれ
も耐食性、耐スポーリング性に優れている。また、実機
試験においてはガス漏れがまったく見られなかった。し
たがって、その耐用回数は、従来タイプ比較例16に比べ
て1.5倍以上であった。さらに、溶鋼取鍋からの取り外
しは、融着がないために極めて容易であった。The porous plugs obtained from the examples of the present invention are excellent in corrosion resistance and spalling resistance. Moreover, no gas leakage was observed in the actual machine test. Therefore, the service life was 1.5 times or more as compared with the conventional type comparative example 16. Further, the removal from the molten steel ladle was extremely easy because there was no fusion.
これに対し比較例15は、外周耐火物の炭素含有量が多す
ぎるために耐酸化性に劣り、ポーラス質耐火物に比べて
外周耐火物の溶損速度が大きくなった。On the other hand, Comparative Example 15 was inferior in oxidation resistance because the outer peripheral refractory had too much carbon content, and had a higher dissolution rate of the outer peripheral refractory than the porous refractory.
従来品に相当する比較例16は外周耐火物の鋳込み成形に
より、ポーラス質耐火物と外周耐火物を一体化したもの
である。ポーラス質耐火物に発生したキレツが外周耐火
物に伝播し、ガス漏れが生じた。Comparative Example 16 corresponding to the conventional product is one in which the porous refractory and the peripheral refractory are integrated by casting of the peripheral refractory. The cracks generated in the porous refractory propagated to the peripheral refractory, causing gas leakage.
比較例14は、外周耐火物が耐食性、耐スポーリング性に
劣り、ガス漏れが著しかった。また、融着によって溶鋼
取鍋からの取り外しが容易でなかった。In Comparative Example 14, the outer peripheral refractory was inferior in corrosion resistance and spalling resistance, and gas leakage was remarkable. Moreover, it was not easy to remove the molten steel from the ladle by fusion.
〔発明の効果〕 本発明により得られるポーラスプラグの効果を列挙すれ
ばつぎのとおりである。 [Effects of the Invention] The effects of the porous plug obtained by the present invention are listed below.
（１）外周耐火物がカーボン含有耐火物であることで耐
食性および耐スポーリング性が向上し、ガス漏れ防止の
効果が大きい。(1) Since the outer peripheral refractory material is a carbon-containing refractory material, the corrosion resistance and spalling resistance are improved, and the effect of preventing gas leakage is great.
（２）耐火物はカーボンの含有によって耐食性が向上す
る反面、ガス透過性に劣るが、本発明ではカーボン含有
耐火物を外周耐火物に使用したので、ポーラスプラグと
してのガス透過性を低下させることがない。(2) Although the refractory has improved corrosion resistance due to the inclusion of carbon, it is inferior in gas permeability, but since the carbon-containing refractory is used as the outer peripheral refractory in the present invention, the gas permeability as a porous plug should be reduced. There is no.
（３）外周耐火物がカーボン含有耐火物であることによ
り、ポーラスプラグはその周囲れんがとの融着が防止さ
れ、ポーラスプラグの交換が容易となる。(3) Since the outer peripheral refractory is a carbon-containing refractory, the porous plug is prevented from being fused with the surrounding bricks, and the porous plug can be easily replaced.
（４）外周耐火物は熱膨張が小さいカーボン含有耐火物
であり、ポーラス質耐火物の膨張を受けとめ、両者間の
接合部が密着し、その接合部からのガス漏れが防止され
る。(4) The outer peripheral refractory is a carbon-containing refractory having a small thermal expansion, receives the expansion of the porous refractory, and the joint between the two adheres to each other to prevent gas leakage from the joint.
図は、実機試験器を示す。 1:ポーラス耐火物 2:外周耐火物 3:メタルケース 4:ガス導入管 5:空隙 The figure shows an actual tester. 1: Porous refractory 2: Perimeter refractory 3: Metal case 4: Gas inlet pipe 5: Void
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２１Ｃ 5/48 Ｄ 7/072 Ｐ Ｃ０４Ｂ 35/44 １０１ (72)発明者 小宮 敏明 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 土成 昭弘 兵庫県高砂市荒井町新浜１―３―１ ハリ マセラミック株式会社内 (72)発明者 下林 修 兵庫県高砂市荒井町新浜１―３―１ ハリ マセラミック株式会社内 (72)発明者 田路 孝 兵庫県高砂市荒井町新浜１―３―１ ハリ マセラミック株式会社内 (56)参考文献 特開 昭57−55387（ＪＰ，Ａ) 実願 昭60−159434号（公開 昭62− 70156号）の願書に添付した明細書及び図 面の内容を撮影したマイクロフィルム（Ｊ Ｐ，Ｕ) 実願 昭63−5262号（公開 平１− 109800号）の願書に添付した明細書及び図 面の内容を撮影したマイクロフィルム（Ｊ Ｐ，Ｕ)─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C21C 5/48 D 7/072 P C04B 35/44 101 (72) Inventor Toshiaki Komiya Oita City, Oita Prefecture Daiji Nishinosu No. 1 Nippon Steel Co., Ltd. Oita Steel Co., Ltd. (72) Inventor Akihiro Donari 1-3-1 Niihama, Niihama, Arai Town, Takasago, Hyogo Prefecture (72) Inventor Osamu Shimobayashi Takasago, Hyogo Prefecture 1-3-1 Niihama, Arai-cho, Ibaraki (72) Inventor Takashi Taji 1-3-1 Niihama, Niihama, Arai-cho, Takasago-shi, Hyogo (56) Reference JP-A-57-55387 ( JP, A) A microfilm (J) of the specification and drawings attached to the application of Japanese Patent Application No. 60-159434 (publication No. 62-70156). , U) real gun Sho 63-5262 (microfilm taken the application form to the accompanying specification and content of the Drawing of the publication flat 1- 109800) (J P, U)
Claims (2)
火性骨材を主材とした配合物よりなる焼成または不焼成
のカーボン含有耐火物を外周耐火物とし、その内部にガ
ス透過性のポーラス質耐火物を設けたガス吹き込み用ポ
ーラスプラグ。1. A fired or non-fired carbon-containing refractory made of a compounding composition containing 1 to 40% by weight of carbon and the remainder being refractory aggregate as a main material is a peripheral refractory, and gas permeation into the inside thereof. Porous plug for gas injection with a porous refractory material.
ネルより選ばれる一種または二種以上である請求項１記
載のガス吹き込み用ポーラスプラグ。2. The porous plug for gas blowing according to claim 1, wherein the refractory aggregate is one or more selected from alumina, magnesia and spinel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1332856A JPH0735291B2 (en) | 1989-12-25 | 1989-12-25 | Porous plug for blowing gas |
| KR1019900021394A KR910012268A (en) | 1989-12-25 | 1990-12-21 | Porous plug for gas blowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1332856A JPH0735291B2 (en) | 1989-12-25 | 1989-12-25 | Porous plug for blowing gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03193813A JPH03193813A (en) | 1991-08-23 |
| JPH0735291B2 true JPH0735291B2 (en) | 1995-04-19 |
Family
ID=18259570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1332856A Expired - Fee Related JPH0735291B2 (en) | 1989-12-25 | 1989-12-25 | Porous plug for blowing gas |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0735291B2 (en) |
| KR (1) | KR910012268A (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5755387A (en) * | 1980-09-17 | 1982-04-02 | Toshiba Ceramics Co | Porous refractory for blowing gas |
| JPS6046168A (en) * | 1983-08-22 | 1985-03-12 | Tokyo Electric Co Ltd | Facsimile method conversion device |
| JPS60159434A (en) * | 1984-01-31 | 1985-08-20 | Showa Mfg Co Ltd | Damping force adjustable shock absorber |
| JPS62185822A (en) * | 1986-02-10 | 1987-08-14 | Nippon Kokan Kk <Nkk> | Gas blowing plug |
| JPS635262A (en) * | 1986-06-25 | 1988-01-11 | Sumitomo Chem Co Ltd | Quantitative analysis of dibutyl hydrogenphosphate and monobutyl dihydrogenphosphate in nuclear fuel re-treatment solvent |
-
1989
- 1989-12-25 JP JP1332856A patent/JPH0735291B2/en not_active Expired - Fee Related
-
1990
- 1990-12-21 KR KR1019900021394A patent/KR910012268A/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03193813A (en) | 1991-08-23 |
| KR910012268A (en) | 1991-08-07 |
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