JPH03248026A - Thermocouple protecting pipe characterized by high corrosion resistance for measuring temperature of molten iron - Google Patents
Thermocouple protecting pipe characterized by high corrosion resistance for measuring temperature of molten ironInfo
- Publication number
- JPH03248026A JPH03248026A JP2046347A JP4634790A JPH03248026A JP H03248026 A JPH03248026 A JP H03248026A JP 2046347 A JP2046347 A JP 2046347A JP 4634790 A JP4634790 A JP 4634790A JP H03248026 A JPH03248026 A JP H03248026A
- Authority
- JP
- Japan
- Prior art keywords
- zirconia
- refractory
- molten steel
- molten iron
- based refractory
- 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
- 230000007797 corrosion Effects 0.000 title claims abstract description 17
- 238000005260 corrosion Methods 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 22
- 229910052742 iron Inorganic materials 0.000 title claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 60
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims description 21
- 239000011819 refractory material Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 44
- 239000010959 steel Substances 0.000 abstract description 44
- 229910002804 graphite Inorganic materials 0.000 abstract description 10
- 239000010439 graphite Substances 0.000 abstract description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 description 26
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は特に上面にスラグ層を有する溶鋼の温度を浸漬
して測定する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention particularly relates to an apparatus for measuring the temperature of molten steel having a slag layer on its upper surface by immersion.
［従来の技術］
溶鋼の温度を管理することは、鋳造製品の品質決定要因
のうちでも最も重要な管理要因であるし、又、高炉の出
銑温度を管理することは炉況の判断や溶銑予備処理の反
応制御のための必須の情報である。[Conventional technology] Controlling the temperature of molten steel is the most important control factor among the quality determining factors of cast products, and controlling the tapping temperature of the blast furnace is necessary for determining the furnace condition and controlling the molten metal. This is essential information for pretreatment reaction control.
従って、溶鋼や溶銑の温度を測定することは、操業上の
最重要事項であり、そのため種々の温度測定装置が開発
されている。この場合、連続鋳造のように長時間のｉ造
時間を要する操業では、溶鋼の温度は継続して測定する
ことが望ましいことから、溶鋼にたいして耐食性のある
アルミナグラファイト系保護管に内蔵した熱電対による
浸漬型の測定装置が一般に用いられている。しかし、こ
の種の溶鋼は一般に上面にスラグ層を有しており、その
ため保護管のスラグ層と接触している部分が溶損しやす
く、また、上面にスラグ層がない場合でも、大気との境
界面に発生する酸化鉄等により溶損しやすいと云う問題
がある。Therefore, measuring the temperature of molten steel and hot metal is the most important matter in operation, and various temperature measuring devices have been developed for this purpose. In this case, in operations that require long casting times, such as continuous casting, it is desirable to continuously measure the temperature of the molten steel, so a thermocouple built into an alumina-graphite protective tube, which is resistant to corrosion, is used to measure the temperature of the molten steel. Immersion type measuring devices are commonly used. However, this type of molten steel generally has a slag layer on its top surface, so the parts of the protection tube that are in contact with the slag layer are susceptible to melting damage, and even if there is no slag layer on the top surface, the boundary with the atmosphere There is a problem in that iron oxide etc. generated on the surface easily cause corrosion and damage.
そのため溶鋼の境界面による溶損の対策も種々検討され
ている。Therefore, various countermeasures against erosion caused by the interface of molten steel are being considered.
その−例として、熱電対の保護管の大気と溶鉄との境界
面に対応する位置にプロテクターを設けた温度測定装置
が提案されている（実開平１−１３６４３２号公報、実
開平１−１３６４３３号公報）。As an example of this, a temperature measuring device has been proposed in which a protector is provided at a position corresponding to the interface between the atmosphere and molten iron of a protective tube of a thermocouple (Japanese Utility Model Publication Nos. 1-1-136432 and 1-136433). Public bulletin).
［発明が解決しようとする課！ｆｌ］
しかしながら、上述した温度測定装置は保護管の大気と
溶鉄との境界面に対応する位置に、ホウ化ジルコニウム
（ＺｒＢ２）製のプロテクターをアルミナ・シリカ質シ
ール材を介して保護管に取付けているために、上面にス
ラグ層を有しておる溶鋼を対象とした場合には、スラグ
がアルミナ・シリカ質シール材を侵食して、そこから保
護管を溶損すると云う問題がある。又、この種の温度測
定装置は一般に溶鋼を収納した容器例えばタンデイツシ
ュに蓋を設け、その蓋に細孔を設けて、細孔から温度測
定装置を垂下して、溶鋼内に浸漬して測定している。そ
のためプロテクターを取付けた場合は温度測定装置の上
下操作が煩雑で、必要以上に細孔を大きくしなければな
らない等の問題がある。[The problem that the invention tries to solve! [fl] However, the temperature measurement device described above requires a protector made of zirconium boride (ZrB2) to be attached to the protection tube through an alumina-silica sealing material at a position corresponding to the interface between the atmosphere and the molten iron. Therefore, when using molten steel that has a slag layer on its upper surface, there is a problem that the slag corrodes the alumina-silica sealing material and the protective tube is eroded from there. In addition, this type of temperature measuring device is generally made by providing a lid on a container containing molten steel, such as a tundish, and providing a small hole in the lid, and then suspending the temperature measuring device from the hole and immersing it in the molten steel to measure the temperature. ing. Therefore, when a protector is attached, there are problems such as complicated operation of raising and lowering the temperature measuring device and the need to make the pores larger than necessary.
本発明は、長時間継続して温度測定が出来、また間欠的
にも温度測定が出来、操作の容易な溶鋼温度測定装置を
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 molten steel temperature measuring device that can measure temperature continuously for a long period of time, can also measure temperature intermittently, and is easy to operate.
［課題を解決するための手段］
上記目的を達成するために、本発明は耐火物製保護管に
内蔵した熱電対で、浸漬して溶鋼の温度を測定する装置
において、前記保護管の溶鋼の境界面（スラグライン部
）を含む保護管部をジルコニア系耐火物で形成して一体
構造とした溶鋼温度測定装置とするものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an apparatus for measuring the temperature of molten steel by immersion using a thermocouple built in a refractory protection tube. This is a molten steel temperature measuring device having an integral structure in which a protective tube portion including a boundary surface (slag line portion) is formed of a zirconia-based refractory.
特に溶鋼の境界面がスラグ層との境界面であり、そのス
ラグ層と接触する保護管部をジルコニア系耐火物で形成
して一体構造とした溶鋼温度測定装置とするものである
。In particular, the interface between the molten steel and the slag layer is the interface between the molten steel and the slag layer, and the protective tube portion that comes into contact with the slag layer is made of a zirconia refractory to provide an integrated molten steel temperature measuring device.
［作用］
本発明は溶鋼の境界面で、保護管の接触条件の異なる状
態に対して、その状態に適応した材質を用いて、一体構
造の保護管を形成したものであり、保護管の溶鋼の境界
面を含む保護管部をジルコニア系耐火物としているので
、ジルコニア系耐大物がスラグに対して耐食性が大きい
ことがら、上面にスラグ層を有する溶鋼の場合には、ス
ラグによる保護管の溶損を防止出来る。又、ジルコニア
系耐火物は大気と溶鋼との境界面で発生する酸化鉄、酸
化マンガンに対しても、耐食性が大きいので、同様に保
護管の溶損を防止出来る。[Function] The present invention forms a protection tube with an integral structure using a material adapted to the different contact conditions of the protection tube at the interface between the molten steel and the molten steel of the protection tube. Since the protective tube part including the boundary surface is made of zirconia-based refractories, zirconia-based large-sized materials have high corrosion resistance against slag. Loss can be prevented. Furthermore, since zirconia refractories have high corrosion resistance against iron oxide and manganese oxide generated at the interface between the atmosphere and molten steel, it is possible to similarly prevent erosion of the protective tube.
本発明は保護管全体をジルコニア系耐火物で構成するも
のではない１本発明は工業用の溶鋼温度測定装置を対象
とするものであり、大気、溶融金属に耐食性の大きい安
価なアルミナグラファイト系耐火物等を保護管の残部に
用い、スラグ又は発生する酸化鉄等による溶損の激しい
個所にジルコニア系耐火物を用いる実用的に適した溶鋼
温度測定装置とするものである。In the present invention, the entire protective tube is not made of zirconia-based refractories.1 The present invention is directed to an industrial molten steel temperature measuring device, and uses an inexpensive alumina-graphite refractory material that is highly resistant to corrosion in the atmosphere and molten metal. This is a practically suitable molten steel temperature measurement device that uses zirconia refractories for the remaining parts of the protective tube and uses zirconia refractories for areas where erosion is severe due to slag or generated iron oxide.
ジルコニア系耐火物としては、ＺｒＯ２−Ｃ等を挙げる
ことが出来る。ここではＳｉＣを含まないことが必要で
ある。ＳｉＣを含んだ場合には、スラグに対しての耐食
性を満足することが出来ない。Examples of the zirconia refractories include ZrO2-C. Here, it is necessary that SiC is not included. If SiC is included, corrosion resistance against slag cannot be satisfied.
［実施例〕 以下に本発明の実施例を図によって説明する。[Example〕 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示す図である１図において
１は溶鋼温度測定装置、２はジルコニア系耐火物で形成
した保護管部、３はアルミナグラファイト系耐火物で形
成した保護管部、４は熱電対、５は端子である。FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1 is a molten steel temperature measuring device, 2 is a protection tube made of a zirconia refractory, and 3 is a protection tube made of an alumina graphite refractory. 4 is a thermocouple, and 5 is a terminal.
本発明の溶鋼温度測定装置１は保護管として、溶鋼１１
の境界面Ａを含む先端側の保護管部２をジルコニア系耐
火物で形成し、残部の保護管部３をアルミナグラファイ
ト系耐火物で形成し、その保護管に熱電対４を内蔵して
いる。ここでは熱電対素線が絶縁管の中を通っている。The molten steel temperature measuring device 1 of the present invention uses a molten steel 11 as a protection tube.
The protective tube section 2 on the tip side including the boundary surface A is formed of a zirconia refractory, the remaining protective tube section 3 is formed of an alumina graphite refractory, and a thermocouple 4 is built into the protective tube. . Here, the thermocouple wire passes through an insulated tube.
熱電対４の端子５は端子箱８に配置されており、そこか
ら補償導線を介して、図示しない温度計用計器に接続さ
れている。６は取付は部である。ここでは溶鋼１１の境
界面Ａを含む先端側の保護管部２をジルコニア系耐火物
で形成したが、第２図に示すように、特に溶＃１１１の
境界面Ａがスラグ層１２との境界面であり、そのスラグ
層１２と接触する保護管部２のみをジルコニア系耐火物
で形成し、溶鋼１１に浸漬している保護管部９をアルミ
ナグラファイト系耐火物で形成したものである。この場
合、スラグラインを基準として、＋１００〜１００１程
度をジルコニア系耐火物による保７管部２とすることが
必要である。溶鋼の境界面が変動することによる。ジル
コニア系耐火物としては、ＺｒＯ２−ｃ等を挙げること
が出来る。１３はタンデイツシュ、１４は保温蓋である
。The terminal 5 of the thermocouple 4 is arranged in a terminal box 8, and is connected from there to a thermometer (not shown) via a compensating conductor. 6 is the installation section. Here, the protective tube part 2 on the tip side including the boundary surface A of the molten steel 11 is formed of a zirconia refractory, but as shown in FIG. Only the protective tube portion 2 that contacts the slag layer 12 is made of a zirconia refractory, and the protective tube portion 9 immersed in the molten steel 11 is made of an alumina graphite refractory. In this case, it is necessary to make the storage section 2 of about +100 to +1001 from the slag line a zirconia refractory. This is due to fluctuations in the boundary surface of molten steel. Examples of the zirconia refractories include ZrO2-c. Reference numeral 13 is a tandaitsu, and 14 is a heat-retaining lid.
本発明の溶鋼温度測定装置は連続鋳造におけるタンデイ
ツシュの溶鋼等の温度測定に継続して用いることが出来
る。しかし、タンデイツシュの補修等から、タンデイツ
シュ交換を必要とした場合、溶鋼温度測定装置をそのタ
ンデイツシュの溶鋼から引抜き、他のタンデイツシュの
溶鋼に浸漬して用いることがある。この場合、溶鋼温度
測定装置の保護管は温度変化にも耐えなければならない
、この場合の熱ショックを緩和するために、ジルコニア
系耐火物で形成した保護管部２、アルミナグラファイト
系耐火物で形成した保護管部３との間はこれらの耐火物
の混合した材料で保護管部１０を形成することが出来る
。The molten steel temperature measuring device of the present invention can be continuously used to measure the temperature of molten steel in a tundish during continuous casting. However, when a tundish cane needs to be replaced due to repair or the like, the molten steel temperature measuring device is sometimes pulled out from the molten steel of that tundish and used by immersing it in the molten steel of another tundish. In this case, the protective tube of the molten steel temperature measuring device must withstand temperature changes.In order to alleviate the thermal shock in this case, the protective tube part 2 is made of zirconia-based refractory, and the protective tube part 2 is made of alumina-graphite-based refractory. The protective tube portion 10 can be formed between the protective tube portion 3 and the protective tube portion 3 made of a mixture of these refractories.
本発明の保護管の成型方法の一例として、型枠にＺｒＯ
２−Ｃを充填し、Ａｌ２Ｏ，−ＣとＺ ｒ Ｏ２Ｃｆ）
混合物を充填し、Ａｌ□Ｏ，−Ｃを充填して、ラバープ
レスによって成型することが出来る。同様に、Ａ１□０
．−Ｃを充填し、Ａ１２０１−ＣとＺｒＯ２−ｃの混合
物を充填し、ＺｒＯ２−Ｃを充填し、Ａｌ２Ｏ，−Ｃと
ＺｒＯ２−Ｃ（７）混合物を充填し、Ａｌ２Ｏ，−Ｃを
充填して、ラバープレスによって成型することが出来る
。As an example of the method for molding the protective tube of the present invention, ZrO is used in the mold.
Filled with 2-C, Al2O, -C and Z r O2Cf)
The mixture can be filled with Al□O, -C, and then molded using a rubber press. Similarly, A1□0
．． -C, filled with a mixture of A1201-C and ZrO2-c, filled with ZrO2-C, filled with a mixture of Al2O, -C and ZrO2-C (7), and filled with Al2O, -C. , it can be molded using a rubber press.
この場合の混合物は、（Ｚ ｒ Ｏ２Ｃ） ／（Ａ Ｉ
２０ｓ Ｃ）＝０．２〜５．０とする。The mixture in this case is (Z r O2C) / (A I
20s C)=0.2 to 5.0.
本発明の溶鋼温度測定装置を連続鋳造におけるタンデイ
ツシュの溶鋼の温度測定に用いた場合、従来のアルミナ
グラフディト系耐火物で形成した保護管部の耐用時間は
約４０時間程度であったのに対して、１００〜１３０時
間に延長することが出来な、この場合、溶鋼の上面の浮
遊したスラグは、焼モミのみからなるＳｉＯ□リッチの
スラグを用いた。ここではＺｒＯ２−（：としてＺｒＯ
２８２．０％、Ｃ１０，１％と、ＺｒＯ２−ＣとしてＺ
ｒＯ２７８．０％、Ｃ１８，０％とのものを用いたが、
両者には差異がなかった。しかし、ＺｒＯ２７１，０％
、Ｃ１８，６％、５ｉＣ９３％のものを用いた場合には
約８０時間の耐用時間を得た。これから上記のようなＳ
ｉ ０２リツチのスラグに接触したアルミナグラファ
イト系耐火物の保護管では０１４ｍ＋ｗ／（時間）程度
の溶損スピードに対して、本発明のＺｒＯ２−Ｃでは０
．１５ｍｍ／（時間）以下の溶損スピードであることが
わかる。また、タンデイツシュパウダー（ＣａＯ／Ｓ
１ｏ２＝０．８〜１１．０）を用いた場合でも同様の傾
向を示している。When the molten steel temperature measuring device of the present invention is used to measure the temperature of molten steel in a tandem tube during continuous casting, the service life of the conventional protective tube section made of alumina graphite refractory is about 40 hours. In this case, the floating slag on the upper surface of the molten steel was SiO□-rich slag made only of burnt rice. Here, ZrO2-(: as ZrO
282.0%, C10.1%, and Z as ZrO2-C
The one with rO2 78.0% and C18.0% was used,
There was no difference between the two. However, ZrO271,0%
, C18.6%, and 5iC 93%, a service life of about 80 hours was obtained. From now on, the S
The corrosion speed of the alumina-graphite refractory protective tube that came into contact with i02-rich slag was about 014m+w/(hour), but the ZrO2-C of the present invention had a melting speed of about 014m+w/(hour).
．． It can be seen that the erosion speed is 15 mm/(hour) or less. In addition, tandaitsu powder (CaO/S
1o2=0.8 to 11.0) also shows a similar tendency.
本発明のジルコニア系耐火物はＳｉＣの含まない、また
は少ない、ＺｒＯ２−Ｃを主体としたジルコニア系耐火
物が好ましい、この場合、ＺｒＯ２−ＣのＣの割合は１
０〜２０％であることが望ましい、Ｃの割合は１０％未
満では耐スボール性が悪く、２０％を超えた場合では溶
損が大きくなる。The zirconia-based refractory of the present invention is preferably a zirconia-based refractory that does not contain or contains little SiC and is mainly composed of ZrO2-C. In this case, the proportion of C in ZrO2-C is 1.
The proportion of C is preferably 0 to 20%. If the proportion of C is less than 10%, the anti-sball property will be poor, and if it exceeds 20%, the melting loss will increase.
本発明は以上のように、保護管の接触する状態に適した
耐火物を用い、寿命の延長が出来るので、総合して安価
な溶鋼温度測定装置を得ることが出来る。As described above, the present invention uses a refractory material suitable for the state of contact between the protective tubes and can extend the service life, thereby making it possible to obtain a molten steel temperature measuring device that is inexpensive overall.
［発明の効果］
本発明によれば、保護管の溶鋼の境界面を含む保護管部
をジルコニア系耐火物で一体構造にすると云う簡単な構
造によって、溶鋼の境界面におけるスラグ等の溶損を回
避し寿命の延長が出来るので、総合して安価な実用上効
果の大きい発明である。[Effects of the Invention] According to the present invention, the corrosion loss of slag, etc. at the boundary surface of molten steel can be prevented by a simple structure in which the protective tube part including the boundary surface of the molten steel is integrally constructed with zirconia-based refractories. Since it is possible to avoid this and extend the service life, it is an invention that is generally inexpensive and has a great practical effect.
第１図は本発明の一実施例を示す図、第２図は本発明の
他の実施例を示す図である。
１・・・溶鋼温度測定装置、２・・・ジルコニア系耐火
物で形成した保護管部、３・・・アルミナグラファイト
系耐火物で形成した保護管部、４・・・熱電対、５・・
・端子、
０・・・混合物による保護管部。FIG. 1 is a diagram showing one embodiment of the invention, and FIG. 2 is a diagram showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Molten steel temperature measuring device, 2... Protection tube part formed with zirconia-based refractory, 3... Protection tube part formed with alumina graphite-based refractory, 4... Thermocouple, 5...
・Terminal, 0... Protection tube part made of mixture.
Claims (4)
する装置の部品であつて、溶融鉄のなかに浸漬して用い
られる熱電対保護管において、スラグライン部を含む部
分をジルコニア系耐火物で構成し、そのスラグライン部
以外の部分をアルミナ系耐火物で構成し、耐火物全体を
一体の構造としたことを特徴とする溶融鉄温度測定用高
耐食性熱電対保護管。(1) In a thermocouple protection tube that is used by being immersed in molten iron, which is a component of a device that continuously measures the temperature of molten iron using a thermocouple as a temperature measuring element, the portion including the slag line is made of zirconia. A highly corrosion-resistant thermocouple protection tube for measuring the temperature of molten iron, characterized in that it is made of refractory material, the parts other than the slag line part are made of alumina-based refractory material, and the entire refractory material has an integral structure.
保護管であって、ジルコニア系耐火物がＺｒＯ＿２−Ｃ
系であり、アルミナ系耐火物がＡｌ＿２Ｏ＿３−Ｃ系で
あり、一体の構造に製造する方法が等方液圧プレスであ
り、ジルコニア系耐火物部分とアルミナ系耐火物部分の
接合境界部分をジルコニア系耐火物とアルミナ系耐火物
との混合組成物であることを特徴とする溶融鉄温度測定
用高耐食性熱電対保護管。(2) A highly corrosion-resistant thermocouple protection tube for measuring molten iron temperature according to claim 1, wherein the zirconia refractory is ZrO_2-C.
The alumina-based refractory is Al_2O_3-C-based, and the method for manufacturing the integral structure is isostatic hydraulic press, and the joint boundary between the zirconia-based refractory part and the alumina-based refractory part is made of zirconia-based refractory material. A highly corrosion-resistant thermocouple protection tube for measuring the temperature of molten iron, characterized by having a mixed composition of a refractory and an alumina-based refractory.
性熱電対保護管であつて、 ジルコニア系耐火物の組成がＣの含有量が１０〜２０％
であり、ＳｉＣを含まない、ＺｒＯ＿２−Ｃを主体とし
たジルコニア系耐火物とする溶融鉄温度測定用高耐食性
熱電対保護管。(3) The highly corrosion-resistant thermocouple protection tube for measuring molten iron temperature according to claim 1 or 2, wherein the zirconia refractory has a C content of 10 to 20%.
A highly corrosion-resistant thermocouple protection tube for measuring molten iron temperature, which does not contain SiC and is made of a zirconia-based refractory mainly composed of ZrO_2-C.
耐食性熱電対保護管であって、取付け部を一体に形成し
たことを特徴とする溶融鉄温度測定用高耐食性熱電対保
護管。(4) A highly corrosion-resistant thermocouple protection tube for measuring molten iron temperature according to claim 1, 2, or 3, characterized in that a mounting portion is integrally formed. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2046347A JPH03248026A (en) | 1990-02-27 | 1990-02-27 | Thermocouple protecting pipe characterized by high corrosion resistance for measuring temperature of molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2046347A JPH03248026A (en) | 1990-02-27 | 1990-02-27 | Thermocouple protecting pipe characterized by high corrosion resistance for measuring temperature of molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03248026A true JPH03248026A (en) | 1991-11-06 |
Family
ID=12744609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2046347A Pending JPH03248026A (en) | 1990-02-27 | 1990-02-27 | Thermocouple protecting pipe characterized by high corrosion resistance for measuring temperature of molten iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03248026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009517678A (en) * | 2005-11-30 | 2009-04-30 | アレヴァ・エンセ | Tube for temperature measurement |
| JP2015168603A (en) * | 2014-03-07 | 2015-09-28 | 宮川化成工業株式会社 | Conductive ceramic for thermocouple, and thermocouple |
| JP2019045173A (en) * | 2017-08-30 | 2019-03-22 | 日新製鋼株式会社 | Continuous temperature measurement probe of molten metal and continuous temperature measurement device |
-
1990
- 1990-02-27 JP JP2046347A patent/JPH03248026A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009517678A (en) * | 2005-11-30 | 2009-04-30 | アレヴァ・エンセ | Tube for temperature measurement |
| JP4913151B2 (en) * | 2005-11-30 | 2012-04-11 | アレヴァ・エンセ | Tube for temperature measurement |
| JP2015168603A (en) * | 2014-03-07 | 2015-09-28 | 宮川化成工業株式会社 | Conductive ceramic for thermocouple, and thermocouple |
| JP2019045173A (en) * | 2017-08-30 | 2019-03-22 | 日新製鋼株式会社 | Continuous temperature measurement probe of molten metal and continuous temperature measurement device |
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