JPS5831017A - Slag detecting method in molten metal vessel - Google Patents
Slag detecting method in molten metal vesselInfo
- Publication number
- JPS5831017A JPS5831017A JP12789981A JP12789981A JPS5831017A JP S5831017 A JPS5831017 A JP S5831017A JP 12789981 A JP12789981 A JP 12789981A JP 12789981 A JP12789981 A JP 12789981A JP S5831017 A JPS5831017 A JP S5831017A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- stopper
- steel
- molten metal
- outflow
- 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
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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は転炉、取鍋等の溶湯容器から溶湯を出湯する際
に流出溶湯流へのスラグの混入時期を明確に検出するス
ラグ検出方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slag detection method for clearly detecting when slag is mixed into a flowing molten metal flow when molten metal is tapped from a molten metal container such as a converter or a ladle.
−例として転炉について述べれば、一般に吹錬後の転炉
内のスラグ量の対゛溶銑比社製鉄所によって異なるが平
均的に約１３９重量９Ｇ（２６容積囁）１１度と考えら
れる。また取鍋へのスラグ温入量はスラグカットを行っ
ていない場合第１図及び第２図に示すグラフの如くなる
。これらグツ７から明らかな如くスラグ流人量は出鋼口
の拡大に伴い加速度的に増加する。さらに第３図は転炉
の傾倒による出鋼時間と出鋼口における（溶鋼＋スラグ
）ＩＩＩさの関係を示しておシηはスラグの混入を生ず
ることなく出鋼される溶鋼量、馬拡堆鍋内に流入するス
ラグ量を示す。上記ηおよび１量を計算にて求めれば、
＝ｓｓｏＡｃ、／ｉ
＝ｗ、ｒｈｃｆ
これよシ
Ｖ、 ： Ｖ、 ＝ ３８０ ： ２．７±１４０ ：
１となる。- Taking the converter as an example, the amount of slag in the converter after blowing generally varies depending on the hot metal steelworks, but it is considered to be about 139 weight 9G (26 volume whisper) 11 degrees on average. Further, the amount of slag warmed into the ladle is as shown in the graphs shown in FIGS. 1 and 2 when slag cutting is not performed. As is clear from these guts 7, the amount of slag flow increases at an accelerating rate as the tap hole expands. Furthermore, Figure 3 shows the relationship between the tapping time due to tilting of the converter and the degree of (molten steel + slag) at the tapping port. It shows the amount of slag flowing into the composter. If the above η and 1 quantity are calculated, =ssoAc, /i =w, rhcf This is V, : V, = 380 : 2.7±140 :
It becomes 1.
但し、Ａ：出鋼口面積 Ｃ：流量係数上記計算からス
ラグとメタルの識別が確実に出来るとすれば、取鍋内に
混入するスラグの貴社゛容積比で１ ／ １４０程度に
出来るはずである。しかし前述し九ように取鍋内には実
際には１／２０ 前後のスラグが混入している。これは
出鋼末期には大量のスラグが混合した状態、すなわち第
４図に示すような状態が数十秒間続くと考えられ、この
ような状態を目視者はいまだメタルゾーンと判断すると
とＫよると考えられる。However, A: Tap area C: Flow coefficient If slag and metal can be reliably distinguished from the above calculation, your company's volume ratio of slag mixed in the ladle should be about 1/140. . However, as mentioned above, the ladle actually contains about 1/20 of the slag. This is because at the end of the tapping stage, a state in which a large amount of slag is mixed, that is, a state shown in Figure 4, is thought to continue for several tens of seconds, and a visual observer still judges this state to be a metal zone, according to K. it is conceivable that.
第５図は出鋼口にフィールドコイルをＭＬシ付はコイル
のインピーダンスの変化をとらえてメタル視者の個人差
をきたすことなく完全にスラグカットが出来るものの、
逆に巻きこみスラグ等によりてメタルとスラグが混合し
て出鋼する領域に移行する場合においてインピーダンス
の変化が顕著に表われない−ため溶鋼、スラグの見極め
が非常にむずかしい。従って、この領域が数十秒間続く
出鋼過・楊で、流出物をエアで吹きとばしたシ或い紘炉
を起こして出鋼を止めたシスライディングノズル装置等
を用いて出鋼を止めたりする場合においても、スラグの
検出が十分でないため完全なスラグカットはおろか、出
鋼歩留シの低下をきたすなどの欠点があシ、これとても
いまだ完全なものとは言いがたい。Figure 5 shows that with a field coil attached to the tap hole, it is possible to completely cut slag by capturing the change in impedance of the coil without causing individual differences among metal viewers.
On the other hand, when metal and slag mix and move to a region where steel is tapped due to rolled-up slag, etc., the change in impedance is not noticeable, making it very difficult to distinguish between molten steel and slag. Therefore, when this area lasts for several tens of seconds, the outflow material can be blown away with air, or the steel tapping can be stopped by using a sliding nozzle device, etc. that starts the furnace and stops the tapping. Even when this method is used, there are drawbacks such as insufficient detection of slag, which leads to a reduction in the yield of steel tapping, not to mention complete slag cutting, and this method is still far from perfect.
以上従来方法について述べて来九が、これら方法は現在
迄のところ一長一短を有しておシ必ずしも満足のゆくス
ラグ検出効果をあげておらず最適方法ないし装置の開発
がまたれてい友。Although the conventional methods have been described above, these methods have their own merits and demerits so far, and have not necessarily produced a satisfactory slag detection effect, and the development of an optimal method or device is still in progress.
本発明はこのような現状をかえりみて創作されたもので
あシ、まずその理論的根拠について述べれば、異なる物
質を２種以上組合す（重ねる）と、その間に起電力が生
じることが知られている。本発明はこのｉｌｌを応用し
たも５のである。これを第６図をもって説明すると、電
極をスラグと溶湯部分に浸漬すると、このスラグと溶湯
量に起電力が生じ、これを検出することができる。従っ
て、溶湯とスラグの変位があると第６図のような状態と
なりてその時点でスラグと溶湯とを明確に識別できるこ
ととなる０なお図中０楊は電圧針、り６ｍ）は電極、轡
は取鍋、（１）はスラグ、（２）は溶湯である０本発明
は以上の理論をスラグ（パウダーも含む）検出方法に応
用することによりて完成されたものでＴｏシ、その要旨
拡溶湯容器の溶湯変位及びスラグ変位の変化によシスラ
グを検出することを特徴とする溶湯容器におけるスラグ
検出方法にあシ、同方法によシその後の迅速なスラグカ
ットあるいは湯面レベル制御を図らんとするものである
０なお、上記検出方法はあらゆる形態のスラグカット方
法に利用できるものであり、後述するスラグストッパー
による方法の他、スライディングノズル装置を用いる方
法、エア吹き等が考えられる。The present invention was created in consideration of the current situation.Firstly, to explain its theoretical basis, it is known that when two or more different materials are combined (overlaid), an electromotive force is generated between them. ing. The present invention is an application of this ill. To explain this with reference to FIG. 6, when an electrode is immersed in the slag and molten metal, an electromotive force is generated in the amount of the slag and molten metal, and this can be detected. Therefore, if there is a displacement between the molten metal and the slag, the situation will be as shown in Figure 6, at which point the slag and the molten metal can be clearly distinguished. is a ladle, (1) is a slag, and (2) is a molten metal.The present invention was completed by applying the above theory to a method for detecting slag (including powder). There is a problem with a method for detecting slag in a molten metal container, which is characterized by detecting syslag based on changes in molten metal displacement and slag displacement in the molten metal container. The above detection method can be used in all types of slag cutting methods, and in addition to the method using a slag stopper described later, methods using a sliding nozzle device, air blowing, etc. can be considered.
またここで「溶湯容器」は造塊設備におけるモールド、
りｙディツシユ等も含むものであシ、この場合、連続鋳
造作業におけるモールドの湯面検出にも、本願発明に係
るスラグカッ方法は利用できることになる。In addition, the "molten metal container" here refers to the mold in the ingot making equipment,
In this case, the slag cutting method according to the present invention can also be used to detect the mold level in continuous casting operations.
以下本発明に係るスラグ検出方法をスラグストッパーに
よるスラグカット４作業に適用したものを第７図に示す
一実施例をもって具体的に説明するＯなお、図中（１）
はスラグ、（２）は溶鋼、（３）はスラグライニング、
（４）は転炉の鉄皮、（＋Ｓ）ａ導電性スラグストッパ
ー。（６）紘溶鋼（２）と鉄皮（４）とを導通状態とな
す第１導通線（なお耐火ライニング（３）が１通性のと
きは不１り、（７）は鉄皮（４）と導電性スラグストッ
パー（５）とを導通状態となす第２導通線、＋８１＋９
）ａ第２導通線（７）と導電性スラグストッパー（５）
間に設けられる電圧針と増巾器、（ＩＩＱＩ）は増巾器
（９）の信号によシ作動する油圧ユニットと駆動機構、
ａりは操作装置である。なお、第２導通線（７）は図示
の配線に限られるもので線なく、第１導通線（６）と同
様な形態にて出鋼口に取シ付けることができ、さらにそ
の場合第１．第２導通ｌｉｔ ｆ６） （７１の埋設位
置は一端が湯道に伸延するようにすることもできる。ま
た一端を出鋼口外にて溶湯流（スラグ流）と接触させて
もよい。Hereinafter, the application of the slag detection method according to the present invention to the slag cutting operation using a slag stopper will be explained in detail with reference to an embodiment shown in FIG.
is slag, (2) is molten steel, (3) is slag lining,
(4) is the steel shell of the converter, (+S)a conductive slag stopper. (6) The first conductive wire that establishes conduction between the Hiroru Steel (2) and the iron sheath (4) (note that this is not the case when the refractory lining (3) is one-way; ) and the conductive slag stopper (5), a second conductive wire, +81+9
)a Second conductive wire (7) and conductive slag stopper (5)
A voltage needle and an amplifier (IIQI) are provided between a hydraulic unit and a drive mechanism operated by a signal from the amplifier (9),
a is an operating device. Note that the second conduction line (7) is not limited to the wiring shown in the figure, and can be attached to the tap hole in the same manner as the first conduction line (6), and in that case, the first ．． Second conduction lit f6) (The buried position of 71 may be such that one end extends into the runner. Also, one end may be brought into contact with the molten metal flow (slag flow) outside the tap hole.
本実施例にあっては、まず出鋼途中、すなわち転炉（２
）内の溶鋼深さく−が一定の値になりたときに導電性ス
ラグストッパー（５）を転炉（２）内に挿入し、同スラ
グストッパー下端にて出鋼口（ＩＩの炉内側をいったん
閉塞する。ついで所定時間（数秒間）経過後導電性スラ
グストッパー（５）を設定量上昇し、同スラグストッパ
ー下端と出鋼口０！１炉内側との間に所定の間隙をつく
り出鋼を再開する。そして出鋼初期は導電性スラグスト
ッパー（５）と鉄皮（４）は溶鋼（２）Ｋよつて電流が
導通状態となるが、第２導通線１７）に投砂た電圧針（
８）は起電力が発生して表いので、まだ変化しない。In this example, first, the steel is being tapped, that is, the converter (2
) When the depth of the molten steel in the converter reaches a certain value, insert the conductive slag stopper (5) into the converter (2), and once close the inside of the tap hole (II) with the lower end of the slag stopper. Then, after a predetermined period of time (several seconds) has elapsed, the conductive slag stopper (5) is raised by a set amount to create a predetermined gap between the lower end of the slag stopper and the inside of the tapping port 0!1 furnace, and the steel is tapped. At the initial stage of tapping, the conductive slag stopper (5) and the steel shell (4) are in a state of conduction due to the molten steel (2), but the voltage needle (
8) represents the generation of electromotive force, so it does not change yet.
しかし導電性スラグストッパー（５）先端接触物がスラ
グ（１）に変ると電圧針（鴫はスラグと溶鋼間に生じた
起電力を検出する。この電流線増中器（９）をオして油
圧ユニットαＱに信号が送られ制御信号と導電性スラグ
ストッパー（５）の駆動機構０を働かせる。However, when the object in contact with the tip of the conductive slag stopper (5) turns into slag (1), the voltage needle detects the electromotive force generated between the slag and the molten steel. A signal is sent to the hydraulic unit αQ to actuate the control signal and the drive mechanism 0 of the conductive slag stopper (5).
このように起電力の検出によって溶鋼（２）とスラグ（
１）の識別を行い、識別後退速に導電性スラグストッパ
ー（５）を再度降下し出鋼の流出間隙を小さくしたシ、
ないしは出鋼口ａ９の閉塞を行う０これによってスラグ
（１）の溶鋼流への混入紘効果的に防止されることにな
る。In this way, by detecting the electromotive force, molten steel (2) and slag (
1) was performed, and the conductive slag stopper (5) was lowered again at the identified backward speed to reduce the outflow gap of the tapped steel.
Alternatively, the tapping port a9 is closed. This effectively prevents the slag (1) from entering the molten steel flow.
なお導電性スラグストッパー（５）を転炉内にて操作す
る装置としては各種形態のものが考えられるが、その−
具体例を第８図および第９図に示す０図示する操作装置
ＱＤ紘転炉囚の炉前側の作業床面上に立設されている建
屋支持柱（２）にジブクレーンの形態で取付けられてお
シ、大概して炉前側の作業床面上に略水平状態にて保持
されているストツバ−支持アームＣ１４１、ＦＱストッ
パ′−支持アーム（財）の先端に吊支されてなる導電性
スラグストッパー（５）、同ストッパー支持チーム（財
）を進退自在に囲んでいるアーム案内筒（至）、同アー
ム案内筒（２）上に取付けられストッパー支持アーム（
２）を転炉回内に進退自在に繰出すアーム繰出機構（至
）、下端をアーム案内筒（至）の基端と回動自在に枢着
し中途を癩屋支持柱（至）の横架取付リプ＠に軸受四を
介して昇降および回動自在（軸心ｍｂ＞に取付けられて
いる垂直アーム支持軸（至）、ストッパー支持アーム（
財）を昇降するべく垂直アーム支持軸（至）に並列され
てなるアーム昇降機構ｏｎ１支持アーム＠をアーム垂直
支持軸（ト）を旋回中心として旋回させるべく横架取付
リブ（至）に並設されているアーム旋回機構（イ）およ
び一端を垂直アーム支持軸（至）の中途に連結し他端を
アーム案内筒（至）の先端に連結してなるアーム俯仰＊
＊（至）よ）構成されている。There are various types of devices that can be used to operate the conductive slag stopper (5) in the converter.
A specific example is shown in FIGS. 8 and 9. The operating device shown in FIG. On the other hand, the stop bar support arm C141 is held in a substantially horizontal state on the work floor on the front side of the furnace, and the conductive slag stopper is suspended from the tip of the FQ stopper' support arm. 5), an arm guide tube (to) that surrounds the stopper support team (foundation) so as to move forward and backward, and a stopper support arm (attached to the arm guide tube (2)).
2) The arm feeding mechanism (to) that moves freely forward and backward into the converter pronation, the lower end is rotatably pivoted to the base end of the arm guide tube (to), and the middle part is next to the leprosy support column (to). The rack mounting lip can be raised and lowered and rotated freely via bearing 4 (the vertical arm support shaft (to) attached to the axis center mb>, the stopper support arm (
The arm elevating mechanism on1, which is parallel to the vertical arm support shaft (to) in order to raise and lower the goods), is arranged in parallel to the horizontal frame mounting rib (to) in order to rotate the arm vertical support shaft (to) as the rotation center. Arm rotation mechanism (A) and arm elevation with one end connected to the midway of the vertical arm support shaft (to) and the other end connected to the tip of the arm guide tube (to) *
* (to) yo) is composed of.
第１０図から第１１−にスラグストッパー（５）の構造
が詳細に示されている。図示するごとくスラグストッパ
ー（至）は下端に球状部顛を有する耐火物筒体ＩＡＯ１
同耐火物筒体θＤ内に挿入される芯体ゆ、同芯体頂部を
介して耐火−筒体＠０に連結されるストッパー吊支棒器
よシなυ、同ストッパー吊支棒ｒ３は上部に設けた長孔
（ハ）をストッパー支持アーム＠の先端に取）付けた吊
支用枢ピンｈａに嵌入することによりて揺動状態に吊支
される。またストッパー吊支棒（至）は頂部に中途をス
トライく一支持アーム（財）の先端に枢支＠ηされてな
る回動レバー−の一端が接触している。一方、回動レバ
ー（４１の他端は連結ロッド−を介してリミット装置等
の制御装置（図示せず）と連絡しておシ、こうすること
によってスラグストッパー（５）は出鋼口内面への接触
後の上昇量を調整することができる。The structure of the slag stopper (5) is shown in detail in FIGS. 10 to 11-. As shown in the figure, the slag stopper (to) is a refractory cylinder IAO1 with a spherical part at the lower end.
The core body inserted into the refractory cylinder θD, the stopper suspension rod υ connected to the refractory cylinder @0 via the top of the concentric body, and the stopper suspension rod r3 at the top It is suspended in a swinging state by fitting the elongated hole (c) provided in the stopper support arm into the suspension pivot pin ha attached to the tip of the stopper support arm. Further, the stopper suspension rod (to) is in contact with one end of a rotating lever which is pivoted at the tip of a support arm (equipment) that runs halfway down the top. On the other hand, the other end of the rotating lever (41) is connected to a control device (not shown) such as a limit device via a connecting rod, and by doing so, the slag stopper (5) is moved to the inner surface of the tapping port. The amount of rise after contact can be adjusted.
上記構成によって操作装置は導電性スラグストッパー（
５）を転炉回内で自在に操作出来上述したスラグカット
を適確に行うことができる。With the above configuration, the operating device is equipped with a conductive slag stopper (
5) can be freely operated in the converter rotation chamber, and the above-mentioned slag cutting can be performed accurately.
又、本発明に係るスラグ検出方法を取鍋および連続鋳造
に適用したものを第１２図、＠１３図に示すｉ実施例を
もりて具体的に説明する。Further, the application of the slag detection method according to the present invention to ladle and continuous casting will be specifically explained with reference to the i embodiment shown in FIGS. 12 and 13.
Ｍ１２図線上注式造塊法におけるスラグカット作業を示
すものである。M12 diagram shows the slag cutting work in the pouring method.
図中、（１）はスラグ、（２）は溶鋼、輪は取鍋、←）
−）は溶鋼中に浸漬した電極、ｆ８１（９１は電極−０
１間に設けた電圧針、増巾器％（ＩＱａ増巾器（９）の
信号を受けて注出流量制御手段であるスライディングノ
ズル装置−）を働かせる油圧ユニット、りａベインット
ケースである。なお、取鍋（ロ）内張耐火物が導電性の
場合、電極―奉は省略し、直接導線（７）を取鍋−へ接
続してもよい。In the diagram, (1) is slag, (2) is molten steel, and the ring is ladle.
-) is the electrode immersed in molten steel, f81 (91 is the electrode -0
1, a hydraulic unit that operates the amplifier % (sliding nozzle device which is a means for controlling the pouring flow rate in response to a signal from the IQa amplifier (9)), and a vent case. In addition, when the refractory lining of the ladle (b) is conductive, the electrode may be omitted and the conducting wire (7) may be directly connected to the ladle.
第１３図は連続鋳造法における湯面制御の作業を示すも
のである。FIG. 13 shows the work of controlling the molten metal level in the continuous casting method.
図中、（１）はパウダー、（２）は溶鋼、吋はタンディ
ッシー、（ロ）は連続鋳造用モールド、＄１）り’ａモ
ールドー）中の溶鋼（２）に浸漬した電極、ｆ８１ｆ９
）は電極（ロ）−を間に設けた電圧針、増巾器、α昧は
増巾器の信号を受けて注出流量制御手段であるスライデ
ィングノズル装置１ゆを働かせる制御装置（油圧ユニッ
ト等）−はスライディングノズル装置に）の注出孔に設
けた浸漬ノズルである。In the figure, (1) is powder, (2) is molten steel, (2) is tundish, (b) is a mold for continuous casting, electrode immersed in molten steel (2) in $1) (mold), f81f9
) is a voltage needle with electrodes (b) and an amplifier between them, and α is a control device (hydraulic unit, etc.) that receives the signal from the amplifier and operates the sliding nozzle device 1, which is a means for controlling the pouring flow rate. )- is a submerged nozzle installed in the spout hole of ) in the sliding nozzle device.
なお、電極ＩＰｏ峠、モールド（ロ）に代る本のとして
一点破線で示すようにタンディツシュ吋の溶鋼（２）に
電極を浸漬してもよい。In addition, as an alternative to the electrode IPo pass and mold (b), the electrode may be immersed in the molten steel (2) of the tanditsu wa as shown by the dotted line.
以上述べてきた如く本発明に係るスラグ検出方法は溶湯
注出口における溶湯からスラグへの変移を迅速に職別し
て七〇後のスラグカットあるいは湯面レベル制御を迅速
かつ確実に行うことができる０As described above, the slag detection method according to the present invention can quickly and reliably detect the transition from molten metal to slag at the molten metal spout, and quickly and reliably perform slag cutting or molten metal level control after 70 years.
第１図および第２図線取鍋内のスラグ混入量と出鋼時間
、チャージ回数との関係を示すグラフ、第３図は出鋼口
における（溶鋼中スラグ）深さと出鋼時間との関係を示
すグラフ、第４図はスラグ−人のメカニズムを示す説明
図、第５図は従来のスラグ検出方法の説明図、第６図は
本発明に係るスラグ検出方法の理論説明図、第７図は本
発明に係るスラグ検出方法を用いたスラグカット作業の
説明図、第８図は同作業に用いる操作装置の正面図、第
９図は同平面図である。第１θ図、第１１図は転炉スラ
グカット作業に用いた例のスラグストッパーの構造及び
ストッパー支持アームとスラグストッパーの連結状態説
明図、第戎図拡本発明に係るスラグ検出方法を上注式造
塊法におけるスラグカット作業に用いた説明図、第１３
図は本発明に係るスラグ検出方法を連続鋳造法のモール
ドの湯面検出に用いた湯面レベル制御の説明図であるＯ
第 １０ フ
第１図
３
第１２図
第１３図
手続補正書
昭和５７年 １月２２日
特許庁長官 島 １）春 樹 殿
１、事件の表示
昭和５６年特許願 第１２７８９９号
３、補正をする者
事件との関係 特許出願人
住所
氏 名 （４５８）日新製鋼株式会社（はが１名）４、
代理人
補正する。Figures 1 and 2 are graphs showing the relationship between the amount of slag mixed in the ladle, the tapping time, and the number of charging times. Figure 3 is the relationship between the depth (slag in molten steel) at the tapping port and the tapping time. FIG. 4 is an explanatory diagram showing the slag-human mechanism; FIG. 5 is an explanatory diagram of the conventional slag detection method; FIG. 6 is a theoretical diagram of the slag detection method according to the present invention; FIG. 8 is an explanatory diagram of a slag cutting operation using the slag detection method according to the present invention, FIG. 8 is a front view of an operating device used for the operation, and FIG. 9 is a plan view thereof. Figures 1θ and 11 are explanatory diagrams of the structure of the slag stopper used in the converter slag cutting work and the state of connection between the stopper support arm and the slag stopper; Explanatory diagram used for slag cutting work in the agglomeration method, No. 13
The figure is an explanatory diagram of molten metal level control using the slag detection method according to the present invention to detect the molten metal level of a mold in a continuous casting method.
No. 10 F. Fig. 1 Fig. 3 Fig. 12 Fig. 13 Procedural amendments January 22, 1980 Director General of the Japan Patent Office Shima 1) Haruki Tono 1, Indication of the case 1982 Patent Application No. 127899 3, Make amendments Relationship with the case Patent applicant Address Name (458) Nisshin Steel Co., Ltd. (1 person) 4.
Correct by proxy.
Claims (1)
変化によシスラグを検出することを特徴とするｆ＃揚容
器におけるスラグ検出方法。1. A method for detecting slag in an f# frying vessel, which is characterized in that syslag is detected by changes in electromotive force caused by displacement of the molten metal and displacement of the slag in the molten metal vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12789981A JPS5831017A (en) | 1981-08-15 | 1981-08-15 | Slag detecting method in molten metal vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12789981A JPS5831017A (en) | 1981-08-15 | 1981-08-15 | Slag detecting method in molten metal vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5831017A true JPS5831017A (en) | 1983-02-23 |
| JPS6160884B2 JPS6160884B2 (en) | 1986-12-23 |
Family
ID=14971409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12789981A Granted JPS5831017A (en) | 1981-08-15 | 1981-08-15 | Slag detecting method in molten metal vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5831017A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093692A (en) * | 1983-10-25 | 1985-05-25 | Dainippon Printing Co Ltd | Method and apparatus for copying program tape for computer |
| JPH0617110A (en) * | 1992-06-30 | 1994-01-25 | Nippon Steel Corp | Method for deciding completion of metal tapping |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5672111A (en) * | 1979-11-14 | 1981-06-16 | Kawasaki Steel Corp | Separate tapping method for molten steel and slag, and its apparatus |
-
1981
- 1981-08-15 JP JP12789981A patent/JPS5831017A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5672111A (en) * | 1979-11-14 | 1981-06-16 | Kawasaki Steel Corp | Separate tapping method for molten steel and slag, and its apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093692A (en) * | 1983-10-25 | 1985-05-25 | Dainippon Printing Co Ltd | Method and apparatus for copying program tape for computer |
| JPH0617110A (en) * | 1992-06-30 | 1994-01-25 | Nippon Steel Corp | Method for deciding completion of metal tapping |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6160884B2 (en) | 1986-12-23 |
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