JPH0763620A - Molten metal measuring instrument and measuring device using the instrument - Google Patents
Molten metal measuring instrument and measuring device using the instrumentInfo
- Publication number
- JPH0763620A JPH0763620A JP5187358A JP18735893A JPH0763620A JP H0763620 A JPH0763620 A JP H0763620A JP 5187358 A JP5187358 A JP 5187358A JP 18735893 A JP18735893 A JP 18735893A JP H0763620 A JPH0763620 A JP H0763620A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- tube
- measuring instrument
- tip
- protective tube
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 96
- 239000002184 metal Substances 0.000 title claims abstract description 96
- 239000000919 ceramic Substances 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 239000011195 cermet Substances 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 46
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- 229910052760 oxygen Inorganic materials 0.000 claims description 27
- 239000001301 oxygen Substances 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 7
- 239000007784 solid electrolyte Substances 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000010453 quartz Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 230000003028 elevating effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000005676 thermoelectric effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶湯測定器具および該
器具を用いた測定装置に係り、さらに詳しくは、鉄や非
鉄の溶湯の温度や溶存酸素を測定可能な溶湯測定器具お
よび該器具を用いた測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal measuring instrument and a measuring apparatus using the instrument, and more particularly to a molten metal measuring instrument and the instrument for measuring the temperature and dissolved oxygen of ferrous or non-ferrous molten metal. The measuring device used.
【０００２】[0002]
【従来の技術】例えば鉄や非鉄の溶湯の温度や酸素濃度
を測定するものとして、熱電対温度計や酸素濃度計（酸
素濃淡電池）が知られている。以下、図５〜７を参照し
て従来の熱電対温度計および酸素濃度計を詳細に説明す
る。図５に示すように、熱電対温度計１００は、先端が
開口されたプラスチックまたはセラミックからなるケー
シング１０１を有しており、ケーシング１０１の先端か
ら外方に向かって、熱電対素線１０２を収納したアーチ
状の石英管１０３が突出している。石英管１０３の元部
側は、ケーシング１０１の先端部内に充填されたセメン
ト１０４により固定されており、またセメント１０４内
には、石英管１０３を外方から被うような半球状の鉄キ
ャップ１０５の元部が固定されている。この熱電対温度
計１００を溶湯内に差し込むと、鉄キャップ１０５が溶
け、外部に露出した石英管１０３の昇温時の起電力を測
定することにより測温するものである。また、酸素濃度
計は、例えば図６の鋳物５５号（１９８３）Ｎｏ．１０
に示す酸素濃度計１１０のように、ケーシング１１１の
先端から、一方の電極１１２と酸化物粉末１１３が内部
に収納された試験管型のＺｒＯ2 系のセラミック管１１
４と、他方の電極１１５と、温度測定用の熱電対素線１
１６を収納した石英管１１７とが突出されている。それ
ぞれの部材１１４、１１５、１１７は外方から鉄キャッ
プ１１８により被われており、また各部材１１４、１１
５、１１７の元部側は、ケーシング１１１の先端部内に
充填されたセメント１１９により固定されている。この
酸素濃度計１１０は、前記熱電対温度計１００の場合と
同様に、溶湯内に差し込んで溶湯中に含まれる酸素濃度
を検出する。2. Description of the Related Art Thermocouple thermometers and oxygen concentration meters (oxygen concentration batteries) are known as those for measuring the temperature and oxygen concentration of ferrous or non-ferrous molten metal. Hereinafter, the conventional thermocouple thermometer and oximeter will be described in detail with reference to FIGS. As shown in FIG. 5, a thermocouple thermometer 100 has a casing 101 made of plastic or ceramic with an open end, and accommodates a thermocouple wire 102 outward from the end of the casing 101. The arched quartz tube 103 is projected. The base side of the quartz tube 103 is fixed by a cement 104 filled in the tip portion of the casing 101, and the hemispherical iron cap 105 that covers the quartz tube 103 from the outside is fixed in the cement 104. The base of the is fixed. When the thermocouple thermometer 100 is inserted into the molten metal, the iron cap 105 is melted, and the electromotive force at the time of temperature rise of the quartz tube 103 exposed to the outside is measured to measure the temperature. Further, the oxygen concentration meter is, for example, the casting No. 55 (1983) No. 5 in FIG. 10
Like the oximeter 110 shown in FIG. 1, a test tube type ZrO 2 system ceramic tube 11 in which one electrode 112 and oxide powder 113 are housed inside from the tip of a casing 111.
4, the other electrode 115, and a thermocouple wire 1 for temperature measurement
A quartz tube 117 containing 16 is projected. Each member 114, 115, 117 is externally covered by an iron cap 118, and each member 114, 115
The base portions of the reference numerals 5 and 117 are fixed by cement 119 filled in the tip portion of the casing 111. Like the thermocouple thermometer 100, the oxygen concentration meter 110 is inserted into the molten metal to detect the oxygen concentration contained in the molten metal.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記従
来の熱電対温度計１００の場合、石英管１０３が浸食さ
れて熱電対素線１０２が破損するので、１回または数回
しか使用できないという問題点があった。そこで石英管
１０３を、耐熱性のあるアルミナまたはジルコニアなど
のセラミックに代えることが考えられるが、この場合に
は熱衝撃により破損するという別の問題点が生じる。ま
た、酸素濃度計１１０の場合には、一回の使用によりセ
ラミック管１１４および電極１１５が破損するので、完
全な使い捨て構造になっている。このように、熱電対温
度計１００および酸素濃度計１１０の何れであっても多
数回の使用が困難であるので、頻繁に新しいものに交換
しなければならず、一回の温度測定にかかるコストが高
くなるという問題点があった。そこで、これを解決する
ものとして例えば図７に示すような熱電対温度計１２０
が考えられる。すなわち、熱電対温度計１２０は、熱電
対素線１２１を収納した絶縁管１２２をセラミック製の
保護管１２３内に収納し、保護管１２３を熱衝撃性に優
れたサーメット系の外管１２４により被った二重管方式
のものであるが、二重管式であるので応答性が悪く、長
時間溶湯中に挿入しておく必要があることから、作業性
の悪化と共に測定器具周辺の熱的ダメージが大きくな
り、実用上問題がある。例えば、計算上、１ｍｍ厚の二
重管では約４０秒間、２ｍｍ厚になると平衡温度に達す
るのに５０秒間位の時間がかかり、作業性が著しく悪化
することから、連続測温用にしか使用でき難いものと考
えられる。本発明はこのような事情に鑑みなされたもの
で、複数回の使用ができ、しかも測定の応答性の良好な
溶湯測定器具及び装置を提供することを目的とする。However, in the case of the conventional thermocouple thermometer 100, the quartz tube 103 is corroded and the thermocouple wire 102 is damaged, so that the thermocouple thermometer 100 can be used only once or several times. was there. Therefore, it is conceivable to replace the quartz tube 103 with a ceramic such as alumina or zirconia, which has heat resistance, but in this case, another problem of breakage due to thermal shock occurs. Further, in the case of the oximeter 110, the ceramic tube 114 and the electrode 115 are damaged by one use, so that the oximeter has a completely disposable structure. As described above, since it is difficult to use the thermocouple thermometer 100 and the oximeter 110 a large number of times, it is necessary to replace the thermocouple thermometer 100 and the oxygen concentration meter 110 with new ones frequently. There was a problem that the cost was high. Then, as a means for solving this, for example, a thermocouple thermometer 120 as shown in FIG.
Can be considered. That is, in the thermocouple thermometer 120, the insulating tube 122 accommodating the thermocouple wire 121 is accommodated in the ceramic protective tube 123, and the protective tube 123 is covered with the cermet type outer tube 124 having excellent thermal shock resistance. Although it is a double-tube type, it has poor responsiveness because it is a double-tube type, and it needs to be inserted into the molten metal for a long time, resulting in poor workability and thermal damage around the measuring instrument. Is large, and there is a problem in practical use. For example, in the calculation, it takes about 40 seconds for a 1 mm thick double tube and it takes about 50 seconds for the equilibrium temperature to reach the equilibrium temperature at 2 mm thickness, which significantly deteriorates workability, so it is used only for continuous temperature measurement. It is considered difficult to do. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a molten metal measuring instrument and device which can be used a plurality of times and have good measurement responsiveness.
【０００４】[0004]
【課題を解決するための手段】前記目的に沿う請求項１
記載の溶湯測定器具は、内部に測定用の電極または熱電
対を有し、先端部が密閉されたセラミック製の保護管に
より外側が被われた溶湯測定器具において、前記保護管
の先端部を露出させて該保護管をサーメットまたはセラ
ミックからなる熱緩衝管により被うように構成されてい
る。特に、請求項２記載の溶湯測定器具は、請求項１記
載の測定器具において、前記保護管内に熱電対を有し、
溶湯の温度を測定するのに用いられるように構成されて
いる。また、請求項３記載の溶湯測定器具は、請求項１
記載の測定器具において、前記保護管がセラミック型固
体電解質からなり、該保護管内に酸化物粉末および電極
を有し、溶存酸素濃度を測定するに用いられるように構
成されている。さらに、請求項４記載の溶湯測定器具
は、セラミック型固体電解質からなり、先端部が密閉さ
れて酸化物粉末および電極が収納された保護管を、先端
が開口されてサーメットまたはセラミックからなる熱緩
衝管により被った構造の溶存酸素濃度を測定するに用い
られる溶湯測定器具であって、該保護管の先端位置を、
前記熱緩衝管の開口された先端面より管中心側に位置さ
せ、しかも前記熱緩衝管の先端部と前記保護管の先端部
との間の空間に酸化物を充填させて、前記酸化物の構成
元素を多数回測定可能になるように構成されている。ま
た、請求項５記載の溶湯測定器具を用いた測定器具は、
移動可能なアームの先端部に請求項１〜４記載の溶湯測
定器具が取り付けられ、移動手段により前記アームを移
動させて溶湯の自動測定を可能なように構成されてい
る。A method according to the above-mentioned object.
The molten metal measuring instrument described has a measuring electrode or a thermocouple inside, and in a molten metal measuring instrument whose outer end is covered by a ceramic protective tube whose tip is sealed, the tip of the protective tube is exposed. The protection tube is covered with a thermal buffer tube made of cermet or ceramic. In particular, the molten metal measuring instrument according to claim 2 is the measuring instrument according to claim 1, which has a thermocouple in the protective tube,
It is adapted to be used to measure the temperature of the melt. Further, the molten metal measuring instrument according to claim 3 is the instrument according to claim 1.
In the measuring instrument described above, the protective tube is made of a ceramic type solid electrolyte, and the protective tube has an oxide powder and an electrode, and is configured to be used for measuring a dissolved oxygen concentration. Further, the molten metal measuring instrument according to claim 4 is a thermal shock absorber made of a ceramic type solid electrolyte, the tip of which is sealed and a protective tube containing oxide powder and an electrode is opened, and the tip of which is made of cermet or ceramic. A molten metal measuring instrument used for measuring the dissolved oxygen concentration of a structure covered by a tube, wherein the tip position of the protective tube is
The thermal buffer tube is positioned closer to the center of the tube than the opened front end surface of the thermal buffer tube, and the space between the distal end portion of the thermal buffer tube and the distal end portion of the protection tube is filled with oxide to remove the oxide. It is configured so that the constituent elements can be measured many times. Further, a measuring instrument using the molten metal measuring instrument according to claim 5,
The molten metal measuring instrument according to any one of claims 1 to 4 is attached to the tip of a movable arm, and the moving means is configured to move the arm to automatically measure the molten metal.
【０００５】[0005]
【作用】請求項１〜４記載の溶湯測定器具において、測
定時に、溶湯内に溶湯測定器具の先側を差し込むと、溶
湯の熱は保護管の露出した先端部を透過して内部の電極
または熱電対に伝わり、応答性良く溶湯の測定が行われ
る。この際、保護管の露出した先端部より元部側は熱緩
衝管により被われているので、保護管の元部側は温度が
比較的上昇せず、これにより保護管は熱衝撃を受けずに
破損を免れる。特に、請求項２記載の溶湯測定器具にお
いては、保護管内に熱電対を有し、溶湯の温度を測定す
るのに用いられるので、測定時に熱電対から発生した起
電力により溶湯の温度が測定される。また、請求項３記
載の溶湯測定器具においては、測定時に、溶湯中の溶存
酸素がセラミック型固体電解質からなる保護管の露出し
た先端部を透過するので、溶存酸素と保護管内の酸化物
の平行反応を利用して溶湯の溶存酸素濃度が測定され
る。さらに、請求項４記載の溶湯測定器具においては、
例えば熱緩衝管の先端部と保護管の先端部との間の空間
に酸化物としてのＳｉＯ2 を充填した場合、溶湯内に溶
湯測定器具の先側を差し込んで溶湯中の酸素を測定し、In the molten metal measuring instrument according to any one of claims 1 to 4, when the tip side of the molten metal measuring instrument is inserted into the molten metal at the time of measurement, the heat of the molten metal permeates through the exposed tip of the protective tube and the internal electrode or It is transmitted to the thermocouple and the molten metal is measured with good responsiveness. At this time, since the base side of the exposed end of the protective tube is covered with the thermal buffer tube, the temperature of the base side of the protective tube does not rise relatively, so that the protective tube is not subjected to thermal shock. To avoid damage. In particular, the molten metal measuring instrument according to claim 2 has a thermocouple in the protective tube and is used to measure the temperature of the molten metal. Therefore, the temperature of the molten metal is measured by the electromotive force generated from the thermocouple during measurement. It Further, in the molten metal measuring instrument according to claim 3, during measurement, since dissolved oxygen in the molten metal passes through the exposed tip of the protective tube made of a ceramic type solid electrolyte, the dissolved oxygen and the oxide in the protective tube are parallel to each other. The reaction is used to measure the dissolved oxygen concentration in the melt. Furthermore, in the molten metal measuring instrument according to claim 4,
For example, when the space between the tip of the heat buffer tube and the tip of the protective tube is filled with SiO 2 as an oxide, the tip of the molten metal measuring instrument is inserted into the molten metal to measure oxygen in the molten metal,
【０００６】[0006]
【化１】 [Chemical 1]
【０００７】の関係（以下、化学式１という）から溶湯
中のＳｉを測定すると、カントバック分析値との相関が
大きくなり、溶湯中のＳｉ含有量が測定される。また、
請求項５記載の溶湯測定器具を用いた測定装置において
は、移動手段によりアームを移動させてアームの先端部
に取り付けられた溶湯測定器具を溶湯内に自動的に差し
込んで測定する。When Si in the molten metal is measured from the relationship (hereinafter, referred to as chemical formula 1), the correlation with the Cantback analysis value increases, and the Si content in the molten metal can be measured. Also,
In the measuring device using the molten metal measuring instrument according to the fifth aspect, the arm is moved by the moving means and the molten metal measuring instrument attached to the tip of the arm is automatically inserted into the molten metal for measurement.
【０００８】[0008]
【実施例】続いて、添付した図面を参照しつつ、本発明
を具体化した実施例につき説明し、本発明の理解に供す
る。ここに、図１は本発明の第１の実施例に係る溶湯測
定器具の断面図、図２は本発明の第２の実施例に係る溶
湯測定器具の断面図、図３は本発明の第３の実施例に係
る溶湯測定器具の断面図、図４は前記器具を用いた測定
装置の正面図を示している。Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a sectional view of a molten metal measuring instrument according to a first embodiment of the present invention, FIG. 2 is a sectional view of a molten metal measuring instrument according to a second embodiment of the present invention, and FIG. 3 is a sectional view of the present invention. 3 is a sectional view of a molten metal measuring instrument according to the third embodiment, and FIG. 4 is a front view of a measuring device using the instrument.
【０００９】まず、図１を参照して本発明の第１の実施
例に係る溶湯測定器具の構成を説明する。第１の実施例
では、本発明の溶湯測定器具を熱電対温度計に適用して
いる。なお、ここでいう熱電対温度計とは、計器類を除
く測定部のみをいうものとする。図１に示すように、本
発明の第１の実施例に係る溶湯測定器具の一例である熱
電対温度計１０は、先端部が密閉された試験管型のセラ
ミックの一例であるジルコニウム（ＺｒＯ2 ）からなる
保護管１１と、この保護管１１の先端部を露出させて保
護管１１を外側から被う熱衝撃性に優れたサーメットか
らなる熱緩衝管１２とを有している。First, the construction of a molten metal measuring instrument according to the first embodiment of the present invention will be described with reference to FIG. In the first embodiment, the molten metal measuring instrument of the present invention is applied to a thermocouple thermometer. It should be noted that the thermocouple thermometer referred to here means only the measurement unit excluding meters. As shown in FIG. 1, a thermocouple thermometer 10 which is an example of a molten metal measuring instrument according to a first embodiment of the present invention is zirconium (ZrO 2) which is an example of a test tube type ceramic whose tip is sealed. ), And a thermal buffer tube 12 made of cermet having excellent thermal shock resistance that exposes the tip end of the protective tube 11 and covers the protective tube 11 from the outside.
【００１０】保護管１１の内部には、絶縁管１５と白金
−ロジウム製の熱電対素線１６とからなる熱電対が収納
されている。熱緩衝管１２は、耐熱性および導電性を有
するモリブデン（Ｍｏ）−ジルコニア（ＺｒＯ2 ）のサ
ーメットからなる先端部が密閉された試験管型の管材で
ある。また、保護管１１と熱緩衝管１２との間にはアル
ミナセメントまたはシリカセメントなどの耐熱性の充填
材１８が充填されている。なお、保護管１１の露出部の
長さは保護管１１の外径の２倍以下が好ましく、また保
護管１１の外径は７．０ｍｍ以下が好ましい。A thermocouple consisting of an insulating tube 15 and a platinum-rhodium thermocouple element 16 is housed inside the protective tube 11. The heat buffer tube 12 is a test tube type tube material having a sealed tip end made of a cermet of molybdenum (Mo) -zirconia (ZrO 2 ) having heat resistance and conductivity. A heat-resistant filler 18 such as alumina cement or silica cement is filled between the protective tube 11 and the thermal buffer tube 12. The length of the exposed portion of the protective tube 11 is preferably twice the outer diameter of the protective tube 11 or less, and the outer diameter of the protective tube 11 is preferably 7.0 mm or less.
【００１１】続いて、本発明の第１の実施例に係る熱電
対温度計１０を用いて溶銑樋内の溶銑の温度を測定する
際には、溶銑内に熱電対温度計１０の先側を差し込む
と、溶銑の熱は保護管１１の露出した先端部を透過して
熱電対素線１６に伝わることにより、熱電効果による熱
起電力を利用して溶銑の温度が測定される。このよう
に、溶銑の熱が熱電対素線１６に達するまでの経路は、
保護管１１の先端部という比較的熱の伝導性が良好な素
材からなる短い経路になるので、例えば２０秒くらいの
速い測定の応答性が得られる。ところで、溶銑内に熱電
対温度計１０を差し込んだ際、溶銑の熱は保護管１１の
露出した先端部には伝わるが、熱を通し難い熱緩衝管１
２により被われている先端部より元部側には伝わり難
い。従って、保護管１１の元部側にはこの先端部に比べ
てさほど高熱にならない。これにより、保護管１１は熱
衝撃を受けずに破損せず、同じ熱電対温度計１０を数十
回にわたって何度も使用することができ、従来の使い捨
て若しくは数回しか使えないものに比べて、安価な構造
でもって一回の温度測定にかかるコストを低下させるこ
とができる。本発明者が実施例の熱電対温度計１０を用
いて実際に溶銑温度の測定実験を行った結果、５０回測
定しても保護管１１は破損しなかった。Subsequently, when the temperature of the hot metal in the hot metal gutter is measured using the thermocouple thermometer 10 according to the first embodiment of the present invention, the front side of the thermocouple thermometer 10 is placed in the hot metal. When inserted, the heat of the hot metal is transmitted through the exposed tip of the protective tube 11 to the thermocouple element 16, and the temperature of the hot metal is measured by utilizing the thermoelectromotive force due to the thermoelectric effect. In this way, the path until the heat of the hot metal reaches the thermocouple wire 16 is
Since the path of the tip of the protective tube 11 is made of a material having a relatively good heat conductivity, a short measurement response time of, for example, about 20 seconds can be obtained. By the way, when the thermocouple thermometer 10 is inserted into the hot metal, the heat of the hot metal is transmitted to the exposed tip of the protective tube 11, but it is difficult for the heat to pass.
It is hard to be transmitted from the tip covered by 2 to the base side. Therefore, the base portion side of the protective tube 11 does not have much higher heat than the tip portion. As a result, the protection tube 11 is not damaged by thermal shock, and the same thermocouple thermometer 10 can be used many times over tens of times, compared to the conventional one that can be used only once or several times. With an inexpensive structure, the cost for one temperature measurement can be reduced. The present inventor actually conducted a measurement experiment of the hot metal temperature using the thermocouple thermometer 10 of the example, and as a result, the protective tube 11 was not damaged even after 50 measurements.
【００１２】次に、図２を参照して本発明の第２の実施
例に係る溶湯測定器具を説明する。第２の実施例の溶湯
測定器具２０は、モリブデン−ジルコニアからなる大径
のセラミック管２１の先端部に、セメント２２を介して
第１の実施例の熱電対温度計１０と酸素濃度計３０を並
設した例である。なお、ここでいう酸素濃度計３０は計
器類を除いた測定部のみをいう。図２部分拡大図に示す
ように、酸素濃度計３０は、保護管３１がセラミック型
固体電解質の一例であるＺｒＯ2 からなり、また保護管
３１の先端部内にはＣｒ−Ｃｒ2 Ｏ3 からなるパウダー
状の酸化物３２が充填されており、保護管３１の残部に
は、アルミナパウダ３３が充填されている。また保護管
３１内には、先端が酸化物３２まで達した白金素線３４
が収納されており、保護管３１は第１の実施例と同様に
その先端部を露出させて熱緩衝管１２により被われてい
る。セラミック管２１の先端部付近には熱電対温度計１
０と酸素濃度計３０とが収納されており、同図に示すよ
うに温度測定に熱電対素線２３ａ、酸素測定には対とな
る白金線２３ｂがそれぞれ端子２３に接続されている。
またセラミック管２１には紙管２４が収納されている。
なお、紙管２４に代えて管状のセラミックファイバを採
用してもよい。測定時に、溶銑中の溶存酸素が固体電解
質からなる保護管３１の先端部を透過して、酸化物の分
解酸素と溶存酸素間に起電力が発生し、これを前記白金
線２３ｂにより検出して溶銑の溶存酸素が測定される。Next, a molten metal measuring instrument according to a second embodiment of the present invention will be described with reference to FIG. The molten metal measuring instrument 20 of the second embodiment has the thermocouple thermometer 10 and the oximeter 30 of the first embodiment via cement 22 at the tip of a large diameter ceramic tube 21 made of molybdenum-zirconia. This is an example of juxtaposition. In addition, the oximeter 30 referred to here means only a measuring unit excluding instruments. As shown in the partially enlarged view of FIG. 2, in the oximeter 30, the protective tube 31 is made of ZrO 2 which is an example of a ceramic type solid electrolyte, and the tip of the protective tube 31 is made of Cr—Cr 2 O 3. The powdery oxide 32 is filled, and the remaining portion of the protective tube 31 is filled with alumina powder 33. Further, in the protection tube 31, a platinum element wire 34 whose tip reaches the oxide 32 is formed.
The protection tube 31 is covered with the thermal buffer tube 12 with its tip exposed as in the first embodiment. A thermocouple thermometer 1 is provided near the tip of the ceramic tube 21.
0 and an oximeter 30 are housed, and a thermocouple wire 23a for temperature measurement and a platinum wire 23b forming a pair for oxygen measurement are connected to the terminal 23 as shown in FIG.
A paper tube 24 is housed in the ceramic tube 21.
A tubular ceramic fiber may be used instead of the paper tube 24. During the measurement, the dissolved oxygen in the hot metal penetrates the tip of the protective tube 31 made of a solid electrolyte to generate an electromotive force between the decomposed oxygen of the oxide and the dissolved oxygen, which is detected by the platinum wire 23b. The dissolved oxygen in the hot metal is measured.
【００１３】次に、図３を参照して本発明の第３の実施
例に係る溶湯測定器具を説明する。第３の実施例の溶湯
測定器具である酸素濃度計４０は、保護管３１の先端位
置を、セラミック管１２の開口された先端面より管中心
側に位置させ、しかもセラミック管１２の先端部と保護
管３１の先端部との間の空間に酸化物であるＳｉＯ2の
セメント４１を充填させて、セメント４１の構成元素を
多数回測定可能になしたものである。なお、この測定方
法は、溶銑内に酸素濃度計４０の先側を差し込んで溶銑
中の酸素を測定し、前記化学式１の関係から溶銑中のＳ
ｉを測定すると、カントバック分析値との相関が大きく
なり、溶銑中のＳｉ含有量が測定される。また、セメン
ト４１の変わりにＭｇＯを用いて、球状化処理後の残留
マグネシウムもNext, a molten metal measuring instrument according to a third embodiment of the present invention will be described with reference to FIG. In the oxygen concentration meter 40, which is the molten metal measuring instrument of the third embodiment, the tip position of the protective tube 31 is located closer to the center of the tube than the open end surface of the ceramic tube 12, and the tip of the ceramic tube 12 is The space between the protection tube 31 and the tip is filled with SiO 2 cement 41 which is an oxide, so that the constituent elements of the cement 41 can be measured many times. In this measurement method, the tip side of the oxygen concentration meter 40 is inserted into the hot metal to measure the oxygen in the hot metal, and S in the hot metal is determined from the relationship of the above chemical formula 1.
When i is measured, the correlation with the cant back analysis value increases, and the Si content in the hot metal is measured. Further, MgO is used instead of the cement 41 to remove the residual magnesium after the spheroidizing treatment.
【００１４】[0014]
【化２】 [Chemical 2]
【００１５】の関係（以下、化学式２という）より測定
することができる。次に、図４を参照して本発明の第４
の実施例に係る溶湯測定器具を用いた測定装置を説明す
る。第４の実施例の測定装置５０は、台車５１上に長尺
な支柱５２と制御盤５３とが立設されており、支柱５２
には昇降アーム５４が水平昇降できるように設けられて
いる。昇降アーム５４は支柱５２の中間部に設けられた
移動手段の一例であるウインチ５５から導出されたワイ
ヤ５６により昇降する構造になっており、昇降アーム５
４の先端部には下端部に第１の実施例の熱電対温度計１
０が取り付けられた耐熱性の取り付けパイプ５７が設け
られている。ウインチ５５により昇降アーム５４を昇降
させることにより、取り付けパイプ５７に設けられた熱
電対温度計１０を図外の低周波炉内に抜き差しするよう
にしたので、従来では作業者による手作業であった溶湯
の温度測定を自動的に行うことができる。It can be measured by the relationship (hereinafter referred to as chemical formula 2). Next, referring to FIG. 4, a fourth embodiment of the present invention will be described.
A measuring device using the molten metal measuring instrument according to the embodiment will be described. In the measuring apparatus 50 of the fourth embodiment, a long column 52 and a control panel 53 are erected on a carriage 51.
An elevating arm 54 is provided so as to be capable of horizontally elevating. The elevating arm 54 has a structure of elevating and lowering by a wire 56 led out from a winch 55 which is an example of a moving means provided in the middle of the support column 52.
The thermocouple thermometer 1 of the first embodiment is provided at the lower end of the front end of the thermocouple 1.
A heat-resistant mounting pipe 57 to which 0 is mounted is provided. By raising and lowering the raising and lowering arm 54 by the winch 55, the thermocouple thermometer 10 provided on the mounting pipe 57 is inserted into and removed from the low-frequency furnace (not shown). The temperature of the molten metal can be automatically measured.
【００１６】以上、本発明の実施例を説明したが、本発
明はこの実施例に限定されるものではなく、要旨を逸脱
しない範囲での設計変更や動作の変更があっても本発明
に含まれる。例えば、実施例では、熱緩衝管を一本の筒
体により形成したが、これに限定しなくても例えば熱緩
衝管を二つに縦割りした一対の樋状部材から設けるよう
にしてもよい。また、実施例では、溶湯測定器具が酸素
濃度計の場合に、電極として熱電対を採用したが、これ
に限定しなくても通常の電極を採用してもよい。さら
に、溶湯測定器具を用いた測定装置は、実施例のものに
限定しなくてもどのような機構を採用したものであって
もよい。Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and even if there is a design change or operation change within the scope not departing from the gist, the present invention is included. Be done. For example, in the embodiment, the heat buffer tube is formed of a single cylindrical body, but not limited to this, for example, the heat buffer tube may be provided from a pair of gutter-shaped members vertically divided into two. . Further, in the embodiment, when the molten metal measuring instrument is an oxygen concentration meter, a thermocouple is adopted as an electrode, but the invention is not limited to this and a normal electrode may be adopted. Further, the measuring device using the molten metal measuring instrument is not limited to the one of the embodiment, and any mechanism may be adopted.
【００１７】[0017]
【発明の効果】請求項１〜４記載の溶湯測定器具は、こ
のように保護管の先端部を露出させて該保護管をサーメ
ットまたはセラミックからなる熱緩衝管により被ったの
で、溶湯の熱が熱電対に達するまでの経路は比較的伝熱
性の良い短い経路になるので、測定の応答性を良好にで
きる。特に、本発明の溶湯測定器具は、請求項２の場合
のように熱電対温度計として用いたり、請求項３の場合
のように熱電対温度計として用いることができる。ま
た、請求項４記載の溶湯測定器具においては、保護管の
先端位置を、熱緩衝管の開口された先端面より管中心側
に位置させ、しかも熱緩衝管の先端部と保護管の先端部
との間の空間に酸化物を充填させているので、酸化物の
構成元素を多数回測定できる。さらに、請求項５記載の
溶湯測定器具を用いた測定装置においては、移動手段に
よりアームを移動させてアームの先端部に取り付けられ
た溶湯測定器具を溶湯内に自動的に差し込んで測定でき
る。As described above, in the molten metal measuring instrument according to the present invention, since the tip of the protective tube is exposed and the protective tube is covered with the thermal buffer tube made of cermet or ceramic, the heat of the molten metal is The path to reach the thermocouple is a short path with relatively good heat conductivity, and therefore the response of measurement can be improved. In particular, the molten metal measuring instrument of the present invention can be used as a thermocouple thermometer as in the case of claim 2 or as a thermocouple thermometer as in the case of claim 3. In addition, in the molten metal measuring instrument according to claim 4, the tip end position of the protection tube is located closer to the tube center side than the tip end surface where the heat buffer tube is opened, and the tip end portion of the heat buffer tube and the tip end portion of the protection tube. Since the space between and is filled with the oxide, the constituent elements of the oxide can be measured many times. Further, in the measuring device using the molten metal measuring instrument according to the fifth aspect, the arm can be moved by the moving means and the molten metal measuring instrument attached to the tip of the arm can be automatically inserted into the molten metal for measurement.
【図１】本発明の第１の実施例に係る溶湯測定器具の断
面図である。FIG. 1 is a sectional view of a molten metal measuring instrument according to a first embodiment of the present invention.
【図２】本発明の第２の実施例に係る溶湯測定器具の断
面図である。FIG. 2 is a sectional view of a molten metal measuring instrument according to a second embodiment of the present invention.
【図３】本発明の第３の実施例に係る溶湯測定器具の断
面図である。FIG. 3 is a sectional view of a molten metal measuring instrument according to a third embodiment of the present invention.
【図４】前記実施例に係る溶湯測定器具を用いた測定装
置の正面図である。FIG. 4 is a front view of a measuring device using the molten metal measuring instrument according to the embodiment.
【図５】従来手段に係る溶湯測定器具の断面図である。FIG. 5 is a cross-sectional view of a molten metal measuring instrument according to a conventional means.
【図６】他の従来手段に係る溶湯測定器具の断面図であ
る。FIG. 6 is a sectional view of a molten metal measuring instrument according to another conventional means.
【図７】さらに他の従来手段に係る溶湯測定器具の断面
図である。FIG. 7 is a sectional view of a molten metal measuring instrument according to still another conventional means.
１０ 熱電対温度計 １１ 保護管 １２ 熱緩衝管 １５ 絶縁管 １６ 熱電対素線 １８ 充填材 ２０ 溶湯測定器具 ２１ セラミック管 ２２ セメント ２３ 端子 ２３ａ 熱電対素線 ２３ｂ 対となる白金線 ２４ 紙管 ３０ 酸素濃度計（溶湯測定器具） ３１ 保護管 ３２ 酸化物 ３３ アルミナパウダ ３４ 白金素線 ４０ 酸素濃度計（溶湯測定器具） ４１ セメント ５０ 溶湯測定器具を用いた測定装置 ５１ 台車 ５２ 支柱 ５３ 制御盤 ５４ 昇降アーム ５５ ウインチ（移動手段） ５６ ワイヤ ５７ 取り付けパイプ 10 Thermocouple Thermometer 11 Protective Tube 12 Thermal Buffer Tube 15 Insulation Tube 16 Thermocouple Element 18 Filler 20 Molten Metal Measuring Instrument 21 Ceramic Tube 22 Cement 23 Terminal 23a Thermocouple Element Wire 23b Paired Platinum Wire 24 Paper Tube 30 Oxygen Concentration meter (molten metal measuring instrument) 31 Protective tube 32 Oxide 33 Alumina powder 34 Platinum wire 40 Oxygen concentration meter (molten metal measuring instrument) 41 Cement 50 Measuring device using molten metal measuring instrument 51 Carriage 52 Strut 53 Control panel 54 Elevating arm 55 winch (moving means) 56 wire 57 mounting pipe
Claims (5)
し、先端部が密閉されたセラミック製の保護管により外
側が被われた溶湯測定器具において、 前記保護管の先端部を露出させて該保護管をサーメット
またはセラミックからなる熱緩衝管により被ったことを
特徴とする溶湯測定器具。1. A molten metal measuring instrument having a measuring electrode or a thermocouple inside, the outer side of which is covered with a ceramic protective tube whose tip is sealed, wherein the tip of the protective tube is exposed. A molten metal measuring instrument characterized in that the protective tube is covered with a thermal buffer tube made of cermet or ceramic.
度を測定するのに用いられる請求項１記載の溶湯測定器
具。2. The molten metal measuring instrument according to claim 1, which has a thermocouple in the protective tube and is used for measuring the temperature of the molten metal.
らなり、該保護管内に酸化物粉末および電極を有し、溶
存酸素濃度を測定するに用いられる請求項１記載の溶湯
測定器具。3. The molten metal measuring instrument according to claim 1, wherein the protective tube is made of a ceramic type solid electrolyte, and the protective tube has an oxide powder and an electrode and is used for measuring a dissolved oxygen concentration.
部が密閉されて酸化物粉末および電極が収納された保護
管を、先端が開口されてサーメットまたはセラミックか
らなる熱緩衝管により被った構造の溶存酸素濃度を測定
するに用いられる溶湯測定器具であって、 該保護管の先端位置を、前記熱緩衝管の開口された先端
面より管中心側に位置させ、しかも前記熱緩衝管の先端
部と前記保護管の先端部との間の空間に酸化物を充填さ
せて、前記酸化物の構成元素を多数回測定可能になした
ことを特徴とする溶湯測定器具。4. A dissolved structure having a structure in which a protective tube made of a ceramic type solid electrolyte and having a closed end and containing oxide powder and an electrode is covered with a thermal buffer tube made of cermet or ceramic with an open end. A molten metal measuring instrument used for measuring oxygen concentration, wherein a tip position of the protective tube is located closer to a tube center side than an open tip surface of the thermal buffer tube, and a tip portion of the thermal buffer tube is provided. A molten metal measuring instrument, wherein an oxide is filled in a space between the tip of the protection tube and the constituent element of the oxide can be measured many times.
４記載の溶湯測定器具が取り付けられ、移動手段により
前記アームを移動させて溶湯の自動測定を可能にしたこ
とを特徴とする溶湯測定器具を用いた測定装置。5. The method according to claim 1, wherein the movable arm has a distal end portion.
4. A measuring device using the molten metal measuring instrument, wherein the molten metal measuring instrument according to claim 4 is attached, and the arm is moved by a moving means to enable automatic measurement of the molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18735893A JP3287915B2 (en) | 1993-06-15 | 1993-06-29 | Melt measuring instrument |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16976893 | 1993-06-15 | ||
| JP5-169768 | 1993-06-15 | ||
| JP18735893A JP3287915B2 (en) | 1993-06-15 | 1993-06-29 | Melt measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0763620A true JPH0763620A (en) | 1995-03-10 |
| JP3287915B2 JP3287915B2 (en) | 2002-06-04 |
Family
ID=26493013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18735893A Expired - Fee Related JP3287915B2 (en) | 1993-06-15 | 1993-06-29 | Melt measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3287915B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000088668A (en) * | 1998-09-16 | 2000-03-31 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| WO2000075614A1 (en) * | 1999-06-04 | 2000-12-14 | Zimmermann & Jansen Gmbh | Measuring system for determining the physical quantity of a hot liquid |
| JP2014092545A (en) * | 2012-10-31 | 2014-05-19 | Heraeus Electro-Nite International Nv | Measuring probe for measurement in molten metal or slag |
| JP2014160005A (en) * | 2013-02-19 | 2014-09-04 | Tokyo Yogyo Co Ltd | Sensor probe |
| CN115874266A (en) * | 2021-09-27 | 2023-03-31 | 隆基绿能科技股份有限公司 | Oxygen content test device, test method and crystal pulling equipment |
-
1993
- 1993-06-29 JP JP18735893A patent/JP3287915B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000088668A (en) * | 1998-09-16 | 2000-03-31 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| WO2000075614A1 (en) * | 1999-06-04 | 2000-12-14 | Zimmermann & Jansen Gmbh | Measuring system for determining the physical quantity of a hot liquid |
| JP2014092545A (en) * | 2012-10-31 | 2014-05-19 | Heraeus Electro-Nite International Nv | Measuring probe for measurement in molten metal or slag |
| CN103954375A (en) * | 2012-10-31 | 2014-07-30 | 贺利氏电子耐特国际股份公司 | Measuring probe for measurements in melted metal or slag |
| US9360399B2 (en) | 2012-10-31 | 2016-06-07 | Heraeus Electro-Nite International N.V. | Measuring probe for measurements in molten metal or slag |
| JP2014160005A (en) * | 2013-02-19 | 2014-09-04 | Tokyo Yogyo Co Ltd | Sensor probe |
| CN115874266A (en) * | 2021-09-27 | 2023-03-31 | 隆基绿能科技股份有限公司 | Oxygen content test device, test method and crystal pulling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3287915B2 (en) | 2002-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3468780A (en) | Apparatus for determining the oxygen content of molten metal | |
| US4279142A (en) | Technique for in situ calibration of a gas detector | |
| US3630874A (en) | Device for determining the activity of oxygen in molten metals | |
| EP0562801B1 (en) | Oxygen measuring probe | |
| PT1460416E (en) | Solid electrolyte measuring device for the determination of oxygen activity in metal or slag melts and usage of such a measuring device | |
| JP4369717B2 (en) | Corrosion monitoring sensor | |
| US4358630A (en) | Replacement cap for repeating use thermocouple | |
| US4247380A (en) | Technique for in situ calibration of a gas detector | |
| JPH0763620A (en) | Molten metal measuring instrument and measuring device using the instrument | |
| JP4255923B2 (en) | Measuring apparatus and measuring method for measuring oxygen activity in molten metal or slag | |
| KR100313000B1 (en) | Probe for detection of the concentration of various elements in molten metal | |
| RU172338U1 (en) | SUBMERSIBLE PROBE FOR MEASURING TEMPERATURE, OXIDIZATION AND METRIC MELT SAMPLING | |
| US2384024A (en) | Thermocouple tube | |
| JP2849457B2 (en) | Sample temperature detector for thermal analyzer | |
| JP3645439B2 (en) | Thermocouple device | |
| JPH1062382A (en) | Device for executing electrochemical measurment in fused glass or salt | |
| JPH0339701Y2 (en) | ||
| JPS63300924A (en) | Thermoelectric thermometer | |
| JPH0321464Y2 (en) | ||
| US5902468A (en) | Device for conducting electrochemical measurements in glass or salt melts | |
| JPH0628687Y2 (en) | Continuous oxygen concentration measuring device | |
| JP3037332U (en) | Carbon concentration estimation probe | |
| JP2000019025A (en) | Thermocouple for molten metal | |
| JPH032850Y2 (en) | ||
| JP2578543B2 (en) | Sensor probe for measuring the amount of hydrogen dissolved in molten metal and method of using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020212 |
|
| LAPS | Cancellation because of no payment of annual fees |