JPH0677012B2 - Protective tube for molten metal immersion - Google Patents
Protective tube for molten metal immersionInfo
- Publication number
- JPH0677012B2 JPH0677012B2 JP61227493A JP22749386A JPH0677012B2 JP H0677012 B2 JPH0677012 B2 JP H0677012B2 JP 61227493 A JP61227493 A JP 61227493A JP 22749386 A JP22749386 A JP 22749386A JP H0677012 B2 JPH0677012 B2 JP H0677012B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- molten metal
- inorganic
- protective tube
- resistant
- 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 - Lifetime
Links
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は製鋼所などにおいて炉内の溶融金属に計測装置
を浸漬して、温度,酸素濃度,カーボン濃度の測定や試
料採取などを行う際に、計測装置とそれに接続するリー
ド線とを高熱から保護するために使用する保護管に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for measuring temperature, oxygen concentration, carbon concentration, sampling, etc. by immersing a measuring device in a molten metal in a furnace in a steel mill or the like. The present invention relates to a protective tube used to protect a measuring device and lead wires connected to the measuring device from high heat.
一般に溶融金属の温度測定などは温度約1500〜1700℃の
溶融金属中に計測装置を5〜10秒間浸漬して行われる。
従来、この温度測定にはクラフト紙管に計測装置を収納
した測定用ランスが用いられていたが、クラフト紙管は
含有される水分や有機分などの高温における急激な気化
により溶融金属の飛散するいわゆるスプラッシュが発生
しやすいので作業者が危険にさらされることがあり、し
かも短時間で焼失するので計測装置が十分保護されず、
信頼できる測定ができなかった。Generally, the temperature of molten metal is measured by immersing the measuring device in molten metal having a temperature of about 1500 to 1700 ° C. for 5 to 10 seconds.
Conventionally, a lance for measurement in which a measuring device is housed in a kraft paper tube has been used for this temperature measurement, but the kraft paper tube scatters molten metal due to rapid vaporization of contained water and organic components at high temperatures. The so-called splash is likely to cause the worker to be at risk, and since it burns out in a short time, the measuring device is not sufficiently protected,
We couldn't make reliable measurements.
このため、クラフト紙管の外側にアスベスト紙やセラミ
ック繊維シートを巻回積層して、耐熱性と断熱性を有す
る層を設けることによりスプラッシュの発生を押えるこ
とが検討された。しかしながら、アスベストは高温にお
いて結晶水を放出することからスプラッシュの発生を十
分に防止することができず、そのうえアスベストの粉塵
や繊維が人体に害を及ぼすことから取り扱いにも問題が
あった。一方、セラミック繊維シートはそのままでは溶
融金属が浸透しやすいので、シリカゾル,アルミナゾル
などの無機接着剤層をセラミック繊維シート層間、また
は保護管の表面に設けているが、これらの無機接着剤層
は脆い上に高温時に収縮しやすく、とくに溶融金属の浸
透を防止するのに十分な程度まで無機接着剤層を厚くす
ると破損しやすくなるので、未だ実用に供するには至っ
ていなかった。Therefore, it has been considered to suppress the occurrence of splash by winding and stacking asbestos paper or a ceramic fiber sheet on the outside of the kraft paper tube to provide a layer having heat resistance and heat insulation. However, since asbestos releases water of crystallization at high temperatures, it is not possible to sufficiently prevent the generation of splashes, and asbestos dust and fibers are harmful to the human body, which is a problem in handling. On the other hand, since the molten metal easily penetrates the ceramic fiber sheet as it is, an inorganic adhesive layer such as silica sol or alumina sol is provided between the ceramic fiber sheet layers or on the surface of the protective tube, but these inorganic adhesive layers are fragile. Above all, it has not yet been put to practical use because it easily shrinks at high temperature, and in particular, if the inorganic adhesive layer is thick enough to prevent the permeation of the molten metal, it will be easily damaged.
本発明は上記従来技術の欠点を解消すべくなされたもの
であり、溶融金属に浸漬した時に、溶融金属の浸透を防
止し、測定に要するのに十分な時間,内部の計測装置及
びリード線を高熱から保護することのできる保護管を提
供することを目的とする。The present invention has been made to solve the above-mentioned drawbacks of the prior art. When immersed in molten metal, the molten metal is prevented from permeating, and the internal measuring device and the lead wire are kept for a sufficient time required for measurement. The purpose is to provide a protective tube that can be protected from high heat.
本発明は無機繊維シートが紙管に巻回積層されてなる溶
融金属浸漬用保護管において、該無機繊維シートの層間
に耐熱性無機粉末とフィルム形成能を有する粘土鉱物と
無機接着剤とを含む耐熱遮蔽層が形成されていることを
特徴とする溶融金属浸漬用保護管である。The present invention relates to a protective tube for dipping a molten metal in which an inorganic fiber sheet is wound and laminated on a paper tube, and contains heat-resistant inorganic powder, a clay mineral having a film-forming ability, and an inorganic adhesive between layers of the inorganic fiber sheet. A protective tube for dipping molten metal, characterized in that a heat-resistant shielding layer is formed.
本発明に使用する無機繊維シートは、断熱性を持たせる
ために見掛密度0.1〜0.5g/cm3のものが適しており、例
えば、無機繊維のフエルトや無機繊維を無機系または有
機系の接着剤で結合したシートなどが用いられるが、無
機繊維をフィルム形成能を有する粘土鉱物で結合したシ
ートは、強度,可撓性,ノンスプラッシュ性を同時に満
足することができるのでとくに好ましい。The inorganic fiber sheet used in the present invention is suitable to have an apparent density of 0.1 to 0.5 g / cm 3 in order to have a heat insulating property, and, for example, a felt or an inorganic fiber of an inorganic fiber is an inorganic or organic type. A sheet or the like bonded with an adhesive is used, but a sheet in which inorganic fibers are bonded with a clay mineral capable of forming a film is particularly preferable because it can simultaneously satisfy strength, flexibility, and non-splash property.
無機繊維にはシリカ系繊維,アルミナ系繊維,シリカ−
アルミナ系繊維,炭化ケイ素繊維,ロックウール,ガラ
ス繊維などの耐熱性に優れ、公定水分率はほぼ0%であ
る繊維が単独もしくは組み合わせて使用される。Inorganic fibers include silica-based fibers, alumina-based fibers, silica-
Fibers such as alumina fibers, silicon carbide fibers, rock wool, and glass fibers having excellent heat resistance and an official moisture regain of almost 0% are used alone or in combination.
また、上記のフィルム形成能を有する粘土鉱物には、含
水マグネシウムケイ酸塩を主成分とするセピオライトや
含水マグネシウム・アルミニウムケイ酸塩を主成分とす
るアタパルジャイトなどの複鎖状構造の粘土鉱物である
ホルマイト系鉱物,ソジウムモンモリロナイトやヘクト
ライトなどのモンモリロナイト系鉱物,膨潤性フッ素雲
母などが使用される。これら粘土鉱物は水中において粉
末や繊維の分散性を高めることができ、しかも乾燥によ
り固結する性質をもつので、シート形成の際に有効な結
合剤として働く。また、これらの粘土鉱物は有機系接着
剤の様に焼失したり、スプラッシュの原因となったりす
ることはなく、シリカゾル,アルミナゾルなどの無機接
着剤の様に乾燥後、脆くなることもないので無機繊維シ
ートの結合剤として好適である。フィルム形成能を有す
る粘土鉱物を使用する場合、無機繊維シートに必要な強
度を得るためには、少なくとも5重量%の粘土鉱物が含
まれていた方がよいが、粘土鉱物があまり多くなるとシ
ートが緻密になり過ぎて断熱層としての働きが低下する
ため30重量%は越えない方がよい。Further, the clay mineral having a film-forming ability is a clay mineral having a double-chain structure such as sepiolite containing hydrous magnesium silicate as a main component or attapulgite containing hydrous magnesium aluminum silicate as a main component. Formite-based minerals, montmorillonite-based minerals such as sodium montmorillonite and hectorite, and swelling fluoromica are used. These clay minerals can enhance the dispersibility of powders and fibers in water, and have the property of being solidified by drying, and therefore, they work as an effective binder when forming a sheet. Also, these clay minerals do not burn out like organic adhesives or cause splash, and they do not become brittle after drying like inorganic adhesives such as silica sol and alumina sol. It is suitable as a binder for fiber sheets. When using a clay mineral having a film-forming ability, it is preferable that at least 5% by weight of the clay mineral is contained in order to obtain the strength required for the inorganic fiber sheet, but if the clay mineral is too much, the sheet becomes Since it becomes too dense and the function as a heat insulating layer decreases, it is better not to exceed 30% by weight.
なお、無機繊維シートには耐熱性を向上させるために耐
熱性無機粉末が含まれていてもよい。The inorganic fiber sheet may contain a heat resistant inorganic powder in order to improve heat resistance.
上述の無機繊維シートは、クラフト紙などからなる紙管
に巻回積層されるが、その層間には耐熱性無機粉末とフ
ィルム形成能を有する粘土鉱物と無機接着剤とを含む耐
熱遮蔽層が形成される。The above-mentioned inorganic fiber sheet is wound and laminated on a paper tube made of kraft paper or the like, and a heat-resistant shield layer containing heat-resistant inorganic powder, a clay mineral having film-forming ability, and an inorganic adhesive is formed between the layers. To be done.
耐熱遮蔽層に使用される耐熱性無機粉末としては、アル
ミナ,シリカ,ムライト,コージュライト,マグネシ
ア,チタニア,ジルコニア,ジルコン,酸化クロム,炭
化ケイ素,チッ化ケイ素,チッ化ホウ素,リン酸アルミ
ニウム,ドロマイトクリンカーなどの粉末が適している
が、遮蔽性を高めるためには、使用する粉末の少なくと
も50%はその粒径が10μm以下であることが望ましい。The heat-resistant inorganic powder used for the heat-resistant shield layer is alumina, silica, mullite, cordierite, magnesia, titania, zirconia, zircon, chromium oxide, silicon carbide, silicon nitride, boron nitride, aluminum phosphate, dolomite. Powders such as clinker are suitable, but in order to enhance the shielding property, it is desirable that at least 50% of the powders used have a particle size of 10 μm or less.
また、フィルム形成能を有する粘土鉱物には含水マグネ
シウムケイ酸塩を主成分とするセピオライトや含水マグ
ネシウム・アルミニウムケイ酸塩を主成分とするアタパ
ルジャイトなどの複鎖状構造の粘土鉱物であるホルマイ
ト系鉱物,ソジウムモンモリロナイトやヘクトライトな
どのモンモリロナイト系鉱物,膨潤性フッ素雲母などが
使用されるが、このうちとくにセピオライトは非常に微
細な繊維状をなし、粉末の保持性が高く、結合力に優れ
るので好適に用いられる。Clay minerals with film-forming ability are formite-based minerals that are double-chain-structured clay minerals such as sepiolite containing hydrous magnesium silicate as a main component and attapulgite containing hydrous magnesium aluminum silicate as a main component. , Montmorillonite minerals such as sodium montmorillonite and hectorite, and swelling fluoromica are used. Among them, sepiolite has extremely fine fibrous shape, high powder retention and excellent binding strength. It is preferably used.
一方、無機接着剤にはシリカゾル,アルミナゾル,ケイ
酸塩,リン酸塩などが使用されるが、特に無機繊維シー
トにシリカ系やアルミナ系の繊維を使用する場合、高温
時に酸やアルカリに浸食されるので、無機接着剤にはで
きるだけ中性に近いシリカゾルやアルミナゾルを用いる
のが好ましい。On the other hand, silica sol, alumina sol, silicate, phosphate, etc. are used for the inorganic adhesive. Especially when silica-based or alumina-based fiber is used for the inorganic fiber sheet, it is eroded by acid or alkali at high temperature. Therefore, it is preferable to use silica sol or alumina sol which is as neutral as possible for the inorganic adhesive.
耐熱遮蔽層を耐熱性無機粉末とフィルム形成能を有する
粘土鉱物と無機接着剤とで構成するのは、無機繊維シー
ト間の結合に用いられる無機接着剤に耐熱性無機粉末を
加えることにより、耐熱性と溶融金属の浸透を妨げる遮
蔽性とを持たせ、更にフィルム形成能を有する粘土鉱物
を加えることにより、粉末の保持力を高めると共に耐熱
遮蔽層の強度を向上させるためである。The heat-resistant shielding layer is composed of heat-resistant inorganic powder, a clay mineral having film-forming ability, and an inorganic adhesive because the heat-resistant inorganic powder is added to the inorganic adhesive used for bonding between the inorganic fiber sheets. This is because by adding a clay mineral having a property of preventing the penetration of molten metal and having a film-forming ability, the holding power of the powder is increased and the strength of the heat-resistant shielding layer is improved.
従って、耐熱遮蔽層には十分な耐熱性と遮蔽性とを得る
ために耐熱性無機粉末が少なくとも50重量%は含まれて
いた方がよく、また、耐熱遮蔽層の強度を向上させ、高
温にさらされた際に亀裂や破損を生じにくくするため
に、フィルム形成能を有する粘土鉱物が少なくとも2%
以上、好ましくは5〜20%含まれていた方がよく、更に
無機繊維シート間の結合を十分なものとするために、無
機接着剤が少なくとも2%以上、好ましくは5〜40%含
まれていた方がよい。Therefore, in order to obtain sufficient heat resistance and shielding properties, the heat-resistant shielding layer should contain at least 50% by weight of the heat-resistant inorganic powder, and the strength of the heat-resistant shielding layer should be improved so that the heat-resistant shielding layer can be exposed to high temperatures. At least 2% clay mineral with film-forming ability to prevent cracking and damage when exposed
As described above, preferably 5 to 20% is contained, and further, in order to sufficiently bond the inorganic fiber sheets, the inorganic adhesive is contained at least 2% or more, preferably 5 to 40%. It's better.
本発明の溶融金属浸漬用保護管は無機繊維シートの片面
に、耐熱性無機粉末とフィルム形成能を有する粘土鉱物
と無機接着剤とを水に分散せしめた溶液を塗布し、紙管
に巻回して3〜8層の積層管とした後、乾燥することに
より得られる。この時、フィルム形成能を有する粘土鉱
物は耐熱性無機粉末を均一に分散させる作用と、溶液を
増粘させて無機繊維シートに塗布するのに適度な粘度に
する作用と、溶液の粘着性を増す作用とをなす。このた
め、従来は困難であった無機接着剤中に粉末を均一分散
せしめることや、スプラッシュの原因となる有機系増粘
剤を使用せずに粘度をあげる事が、フィルム形成能を有
する粘土鉱物により容易になす事ができるので、表面塗
工が容易にできて加工性が向上し、しかも層中の物質の
結合力も増すので厚みのある均一な耐熱遮蔽層が形成で
きるのである。The protective tube for molten metal immersion of the present invention is coated on one surface of an inorganic fiber sheet with a solution in which a heat-resistant inorganic powder, a clay mineral having a film-forming ability and an inorganic adhesive are dispersed in water, and wound around a paper tube. It is obtained by forming a laminated tube of 3 to 8 layers and then drying. At this time, the clay mineral having a film-forming ability has an effect of uniformly dispersing the heat-resistant inorganic powder, an effect of increasing the viscosity of the solution to an appropriate viscosity for applying to the inorganic fiber sheet, and an adhesive property of the solution. It acts to increase. For this reason, it is a clay mineral having film-forming ability to uniformly disperse the powder in an inorganic adhesive, which has been difficult in the past, and to increase the viscosity without using an organic thickener that causes splash. Since it can be easily formed, the surface coating can be easily performed, the workability is improved, and the binding force of the substance in the layer is also increased, so that a thick and uniform heat-resistant shield layer can be formed.
なお、耐熱遮蔽層は無機繊維シート間の結合力を向上さ
せるために、無機繊維シート内に入り込んでいる方がよ
く、耐熱遮蔽層の厚みの1/10以上は無機繊維シート中に
含浸されていることが望ましい。Incidentally, the heat-resistant shield layer is preferably inserted into the inorganic fiber sheet in order to improve the bonding force between the inorganic fiber sheets, and 1/10 or more of the thickness of the heat-resistant shield layer is impregnated in the inorganic fiber sheet. Is desirable.
また、十分な溶融金属の遮蔽効果を得るために耐熱遮蔽
層の総重量は無機繊維シートの重量より大きい方がよ
く、少なくとも200g/m2はあった方がよいが、取り扱い
上、重くしすぎないために600g/m2は越えない方がよ
い。Further, in order to obtain sufficient molten metal shielding effect, the total weight of the heat-resistant shielding layer is preferably larger than the weight of the inorganic fiber sheet, and at least 200 g / m 2 is better, but it is too heavy for handling. It is better not to exceed 600g / m 2 because it does not exist.
繊維径2〜3μmのシリカ・アルミナ繊維90部とセピオ
ライト10部とアクリル系接着剤2部とを水中で撹拌して
分散液とし、これを抄造した後、アクリル系接着剤2部
を付与して乾燥し、目付150g/m2,厚さ0.6mmの無機繊維
シートを形成した。次いでこの無機繊維シートに耐熱遮
蔽層を形成すべく、下記、配合〜の水性分散体を30
0g/m2(固形分付着量)コーティング加工し、この面が
内側となるように紙管に5回平巻きし、管状に成形後、
最後に硬仕上げのためにシリカゾルの液中に浸漬し、乾
燥して保護管を得た。90 parts of silica / alumina fibers having a fiber diameter of 2 to 3 μm, 10 parts of sepiolite and 2 parts of an acrylic adhesive are stirred in water to form a dispersion liquid, which is made into paper, and then 2 parts of an acrylic adhesive is added. After drying, an inorganic fiber sheet having a basis weight of 150 g / m 2 and a thickness of 0.6 mm was formed. Next, in order to form a heat-resistant shielding layer on this inorganic fiber sheet, the following aqueous dispersions of
0g / m 2 (amount of solid content) coated, rolled flatly on a paper tube 5 times with this side facing inward, molded into a tube,
Finally, for hard finishing, it was immersed in a liquid of silica sol and dried to obtain a protective tube.
ただし、配合〜の水性分散体を用いた保護管を実施
例1〜3、の水性分散体を用いた保護管を比較例1と
する。 However, the protective tubes using the aqueous dispersions of the formulations 1 to 3 are referred to as Examples 1 to 3, and the protective tube using the aqueous dispersions of Examples 1 to 3 is referred to as Comparative Example 1.
上記保護管の先端に石英ガラス管を有する測温用カート
リッジを取付け、次いで保護管内を通したリード線を測
温用カートリッジのリード線接続部に接続して消耗型ラ
ンス熱電対を作成し、この熱電対を1650℃の溶鋼中に浸
漬してからスプラッシュが発生するまでの時間(以下
「浸漬可能時間」という)を測定した。浸漬可能時間の
測定値は各々5本の保護管を用意して5回の測定を行
い、その平均値で示した。A temperature measuring cartridge having a quartz glass tube is attached to the tip of the protective tube, and then the lead wire passing through the protective tube is connected to the lead wire connecting portion of the temperature measuring cartridge to create a consumable lance thermocouple. The time from the immersion of the thermocouple in molten steel at 1650 ° C until the occurrence of splash (hereinafter referred to as "immersable time") was measured. Regarding the measured value of the dipable time, 5 protective tubes were prepared for each, and the measurement was performed 5 times, and the average value was shown.
実施例1〜3の保護管は溶融金属の浸透がよく防止され
ており、浸漬可能時間も通常測定に要する5〜10秒間を
越えているため、使用中のスプラッシュの発生について
何ら問題がなかった。一方、比較例1の保護管は耐熱遮
蔽層に亀裂が生じやすく、浸漬可能時間も10秒前後と短
いため、使用中にスプラッシュの発生する危険があっ
た。The protective tubes of Examples 1 to 3 were well prevented from permeating the molten metal, and the dipable time exceeded the 5 to 10 seconds required for normal measurement, so there was no problem with the occurrence of splash during use. . On the other hand, in the protective tube of Comparative Example 1, cracks were likely to occur in the heat-resistant shielding layer, and the dipping time was as short as about 10 seconds, so there was a risk of splashing during use.
本発明の溶融金属浸漬用保護管は耐熱性に優れた素材か
ら構成されると共に、無機繊維シートからなる断熱層と
耐熱遮蔽層とが交互に積層された構造からなるので、溶
融金属の浸透を防止すると同時に高熱が紙管や内部の計
測装置に伝わるのを防止する働きがある。とくに本発明
の保護管では、耐熱遮蔽層が耐熱性無機粉末とフィルム
形成能を有する粘土鉱物と無機接着剤とを含むため、厚
く、強度のある層が形成できるので、溶融金属の遮蔽効
果が高く、かつ高温によりガスが発生して保護管の内圧
が高くなっても破損しにくい。The protection tube for molten metal immersion of the present invention is composed of a material having excellent heat resistance, and has a structure in which a heat insulating layer and a heat resistant shielding layer made of an inorganic fiber sheet are alternately laminated, so that the penetration of molten metal is prevented. At the same time, it has the function of preventing high heat from being transmitted to the paper tube and internal measuring devices. In particular, in the protective tube of the present invention, the heat-resistant shielding layer contains a heat-resistant inorganic powder, a clay mineral having film-forming ability, and an inorganic adhesive, so that a thick and strong layer can be formed, so that the shielding effect of the molten metal is improved. Even if the internal pressure of the protective tube is high due to the high temperature and the generation of gas due to the high temperature, it is not easily damaged.
従って、本発明の保護管を溶融金属に浸漬しても、その
測定時間内にスプラッシュが発生することはなく、作業
者は安全に作業することができ、また保護管内に収納さ
れた測定装置やリード線も高熱から完全に保護されるた
め正確な測定が可能となるのである。Therefore, even if the protective tube of the present invention is immersed in the molten metal, splash does not occur within the measuring time, the worker can safely work, and the measuring device stored in the protective tube and Accurate measurement is possible because the lead wires are also completely protected from high heat.
しかも、本発明の保護管は耐熱遮蔽層にフィルム形成能
を有する粘土鉱物を用いているため、耐熱性無機粉末が
均一に分散されたコーティング層を容易に形成できる。Moreover, since the protective tube of the present invention uses the clay mineral having the film-forming ability for the heat-resistant shield layer, the coating layer in which the heat-resistant inorganic powder is uniformly dispersed can be easily formed.
この様に本発明の保護管は簡便に品質の良いものが製造
でき、溶融金属の温度、カーボン濃度、酸素濃度の測定
や試料採取などに用いる場合、安全かつ容易な作業で精
度の高い測定が行える極めて有用なものである。As described above, the protection tube of the present invention can be easily produced with good quality, and when used for measuring the temperature of molten metal, carbon concentration, oxygen concentration, sampling, etc., it is a safe and easy operation, and highly accurate measurement is possible. It can be extremely useful.
Claims (1)
る溶融金属浸漬用保護管において、該無機繊維シートの
層間に耐熱性無機粉末とフィルム形成能を有する粘土鉱
物と無機接着剤とを含む耐熱遮蔽層が形成されているこ
とを特徴とする溶融金属浸漬用保護管。1. A protective tube for dipping molten metal in which an inorganic fiber sheet is wound and laminated on a paper tube, and a heat-resistant inorganic powder, a clay mineral having a film forming ability, and an inorganic adhesive are provided between layers of the inorganic fiber sheet. A protective tube for dipping molten metal, characterized in that a heat-resistant shielding layer containing is formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61227493A JPH0677012B2 (en) | 1986-09-25 | 1986-09-25 | Protective tube for molten metal immersion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61227493A JPH0677012B2 (en) | 1986-09-25 | 1986-09-25 | Protective tube for molten metal immersion |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6381264A JPS6381264A (en) | 1988-04-12 |
JPH0677012B2 true JPH0677012B2 (en) | 1994-09-28 |
Family
ID=16861750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61227493A Expired - Lifetime JPH0677012B2 (en) | 1986-09-25 | 1986-09-25 | Protective tube for molten metal immersion |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0677012B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2525250B2 (en) * | 1989-08-17 | 1996-08-14 | 金剛紙工株式会社 | Method for improving performance of heat-resistant protective tube and heat-resistant protective tube |
JPH0647861U (en) * | 1992-10-23 | 1994-06-28 | リケン工業株式会社 | Molten Steel Collection Container |
JP2795146B2 (en) * | 1993-11-30 | 1998-09-10 | 日本鋼管株式会社 | Double coated optical fiber for temperature measurement |
US6004031A (en) | 1993-11-30 | 1999-12-21 | Nkk Corporation | Temperature measuring device |
DE10359449B3 (en) * | 2003-12-17 | 2005-03-03 | Heraeus Electro-Nite International N.V. | A sensor carrier tube formed from a mixture of vegetable fiber material, starch and/or protein useful for measuring metal or cryolithic melts, especially cast iron, steel, or copper melts |
CN115246744A (en) * | 2021-12-29 | 2022-10-28 | 浙江理工大学 | Preparation method of refractory heat-insulating silicon carbide nanofiber-montmorillonite ceramic non-woven fabric |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5444629Y2 (en) * | 1974-11-07 | 1979-12-21 | ||
JPS5525618B2 (en) * | 1974-12-26 | 1980-07-07 | ||
JPS53135696A (en) * | 1977-05-02 | 1978-11-27 | Nippon Kokan Kk | Consumptive type probe |
JPS60183838A (en) * | 1984-03-02 | 1985-09-19 | Nec Corp | Frame synchronizing system |
-
1986
- 1986-09-25 JP JP61227493A patent/JPH0677012B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6381264A (en) | 1988-04-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2933143C2 (en) | Lance tube for blowing fresh agent into molten metal | |
JP2010528857A (en) | Corrosion-resistant mounting material, and its production and use | |
JPH09503993A (en) | Coated product made of graphite / alumina refractory material | |
JPWO2017073115A1 (en) | Coating liquid and method for producing refractory having coating layer | |
JPH0677012B2 (en) | Protective tube for molten metal immersion | |
US10590598B2 (en) | Heat-insulating protective member for skid post and method for applying the heat-insulating protective member for skid post | |
JP7225928B2 (en) | Monolithic refractory coating method for ceramic fiber block | |
JP2008281378A (en) | Heat-resistant protection paper tube and heat-resistant protection tube dipped into molten metal, molten metal temperature measuring probe using them, molten metal sample collection probe, and molten metal oxygen concentration measuring probe | |
ES2885102T3 (en) | Refractory lining material containing low biopersistence fibers and its manufacturing process | |
JPH0345152Y2 (en) | ||
JPH02663Y2 (en) | ||
EP0128665A2 (en) | Heat resistant means | |
JPS6021886A (en) | Coating material for ceramic fiber | |
JP6838606B2 (en) | Insulation protection member, its manufacturing method, construction method, furnace member and heating furnace | |
EP1252115A1 (en) | Carbon-containing refractory article having a protective coating | |
JP6675916B2 (en) | Refractory insulation structure | |
JPS6033279A (en) | Refractory coating material and refractories coated therewith | |
JPH08743B2 (en) | SiO2 impregnated hot stove ceramic burner brick | |
US11466605B2 (en) | Mounting mat for an exhaust gas treatment device | |
JPS6296377A (en) | Coating composition | |
JPS6131073B2 (en) | ||
JPS6112969B2 (en) | ||
JPS6114176A (en) | Formless refractories for cast construction | |
JPH02124786A (en) | Immersion pipe for non-ferrous molten metal | |
JPH08103866A (en) | Pouring nozzle of molten metal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |