JP2000273519A - Method for removing slag from torpedo car - Google Patents

Method for removing slag from torpedo car

Info

Publication number
JP2000273519A
JP2000273519A JP11079375A JP7937599A JP2000273519A JP 2000273519 A JP2000273519 A JP 2000273519A JP 11079375 A JP11079375 A JP 11079375A JP 7937599 A JP7937599 A JP 7937599A JP 2000273519 A JP2000273519 A JP 2000273519A
Authority
JP
Japan
Prior art keywords
slag
hot metal
torpedo car
car
waste
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.)
Withdrawn
Application number
JP11079375A
Other languages
Japanese (ja)
Inventor
Akihiro Arimura
昭洋 有村
Masato Mikuni
正人 三国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP11079375A priority Critical patent/JP2000273519A/en
Publication of JP2000273519A publication Critical patent/JP2000273519A/en
Withdrawn legal-status Critical Current

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  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a slag removing method from a torpedo car which can remove the slag in better condition than the conventional method, even in the case that a worker executs no watch-judgement. SOLUTION: In the slag removing method from the torpedo car for discharging the slag 4 stated on molten iron 3 in the torpedo car 1 from an opening hole arranged at the roof thereof by tilting this torpedo car, sensors 5, 6 for separately detecting the heights of the molten iron and the slag, are arranged to execute the detection of the slag thickness, and the torpedo car is tilted according to this detected value to remove the slag while detecting the slag thickness.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、トピード・カーか
らの排滓方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for discharging waste from a topped car.

【0002】[0002]

【従来の技術】近年、転炉における精錬負荷を軽減する
ため、転炉へ装入する溶銑中のSi,P,Sを事前に除
去する所謂「溶銑予備処理」が普及している。それは、
溶銑中に所定のフラックスやガスを吹き込み精錬して、
上記成分を酸化物としてスラグ中に移行させるものであ
る。この溶銑予備処理を行なうには、精錬容器が必要で
あるが、高炉の傾注樋、取鍋、あるいは溶銑の搬送に用
いられていたトピード・カーが利用されている。
2. Description of the Related Art In recent years, in order to reduce the refining load in a converter, a so-called "hot metal pretreatment" for removing Si, P, and S in hot metal charged into a converter in advance has become widespread. that is,
Refining by blowing a predetermined flux or gas into the hot metal,
The above components are transferred into the slag as oxides. To perform this hot metal pretreatment, a smelting vessel is required, but a tilting gutter, a ladle, or a topped car used to transport hot metal is used in the blast furnace.

【0003】ところで、トピード・カー内で溶銑の予備
処理を行なうに際しては、トピード中に残留するスラグ
量が少ない方が良い。予備処理反応の制御がし易く、投
入又は吹込むフラックス量が低減できるからである。従
って、溶銑予備処理を行う前後には、トピード・カーを
傾動し、機械式ドラッガー(所謂レーキ)でスラグを掻
き出し、完全に除去(排滓)するようにしている。
[0003] When pretreating hot metal in a torpedo car, it is better that the amount of slag remaining in the torpedo is small. This is because the pretreatment reaction can be easily controlled, and the amount of the supplied or blown flux can be reduced. Therefore, before and after performing the hot metal pretreatment, the toped car is tilted, the slag is scraped out with a mechanical dragger (so-called rake), and completely removed (discharged).

【0004】しかしながら、このスラグは、溶銑上に溶
融状態で存在するものと固形物として存在するものがあ
り、固形物は目視でも判断できるが、溶融状態のものは
判断が難しい。通常、作業者は、溶銑との色の差で判定
しているが、溶融状態のものは、トピード・カー内に残
留してしまうことが多い。この残留スラグがあると、溶
銑予備処理でスラグ量が増え、スラグの発泡現象(フォ
ーミング)を起こすので、それを防止するため、フォー
ミング防止用フラックスが過剰に必要となる。また、前
記したトピード・カーからの排滓時に無理をすると、溶
銑も掻き出してしまい、スラグを受ける鍋(スラグ鍋と
いう)に穴を開けたり、転炉へ装入する溶銑の歩留を低
下させてしまう。
[0004] However, there are slags present in a molten state on the hot metal and those present as solids on the hot metal. The solids can be visually determined, but the molten state is difficult to determine. Usually, the operator makes a determination based on the difference in color from the hot metal, but the molten state often remains in the torpedo car. If this residual slag is present, the amount of slag increases in the hot metal pretreatment, causing a slag foaming phenomenon (forming). Therefore, in order to prevent the slag foaming, an excessive flux for forming prevention is required. In addition, if excessive force is applied when discharging from the torpedo car, the hot metal is also scraped out, making a hole in a slag receiving tray (referred to as a slag pot) or reducing the yield of the hot metal charged into the converter. Would.

【0005】[0005]

【発明が解決しようとする課題】本発明は、かかる事情
に鑑み、作業者が目視判断しなくても、従来より良好に
除滓可能なトピード・カーからの排滓方法を提供するこ
とを目的としている。
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a method of removing waste from a torpedo car which can be more effectively removed than before without any visual judgment by an operator. And

【0006】[0006]

【課題を解決するための手段】発明者は、上記目的を達
成するため、スラグ厚みの変化を作業者の目視に頼らず
に、機械化することに着眼した。そして、溶鋼の連続鋳
造では、鋳型内でスラグの下にある溶鋼の高さ(レベ
ル)を、高炉の鋳床では、トピード・カーでの受銑中に
スラグの高さ(レベル)を実測していることから、それ
らのセンサの利用を鋭意検討し、本発明を完成させた。
In order to achieve the above object, the inventor focused on mechanization of a change in slag thickness without relying on visual observation by an operator. In the continuous casting of molten steel, the height (level) of the molten steel below the slag in the mold was measured, and in the blast furnace cast floor, the height (level) of the slag was measured during iron receiving in a topped car. Therefore, the use of those sensors was studied diligently, and the present invention was completed.

【0007】すなわち、本発明は、トピード・カー内で
溶銑上に滞留するスラグを、該トピード・カーを傾動
し、その天井に設けた開口より排出するトピード・カー
からの排滓方法において、前記開口の上方に、溶銑とス
ラグの高さを別々に検知するセンサを設けてスラグ厚み
の検出を行い、その検出値に応じてトピード・カーを傾
動させ、スラグ厚みを検出しつつ排滓することを特徴と
するトピード・カーからの排滓方法である。
That is, the present invention relates to a method for discharging slag remaining on hot metal in a torpedo car from a torpedo car by tilting the torpedo car and discharging the slag from an opening provided in a ceiling thereof. Provide a sensor above the opening to separately detect the height of the hot metal and the slag, detect the slag thickness, tilt the torpedo car according to the detected value, and discharge while detecting the slag thickness This is a method of discharging waste from a topped car.

【0008】また、本発明は、前記高さを検知するセン
サを、溶銑用には渦電流式レベル計、スラグ用にはマイ
クロ波式レベル計とすることを特徴とするトピード・カ
ーからの排滓方法でもある。
Further, the present invention provides a sensor for detecting height, wherein an eddy current type level meter for hot metal and a microwave type level meter for slag are used for discharging from a topped car. It is also a slag method.

【0009】本発明によれば、スラグの残量を作業者が
目視観察する以上に正確な判定ができるようになったの
で、トピード・カーからの排滓が従来より円滑且つ精度
良く行なえるようになる。
According to the present invention, the remaining amount of the slag can be determined more accurately than the worker can visually observe, so that the waste from the torpedo car can be more smoothly and accurately performed than before. become.

【0010】[0010]

【発明の実施の形態】以下、図面を参照して、本発明の
実施の形態を説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0011】まず、トピード・カー1内のスラグ厚み2
は、溶銑3及びスラグ4の位置(レベル)をそれぞれの
センサを用いて測定することで検出する。すなわち、図
1に示すように、2つのセンサをトピード・カー1の開
口7上方に設ける。それらセンサのうち、スラグ用セン
サ5は、基準位置に固定して配置してあるが、溶銑用セ
ンサ6は、トピード・カー1が傾動しても、開口7から
の測定が可能なように、基準位置から昇降自在に懸架さ
れるようにしてある。これにより、スラグ厚みは、次式
で容易に演算される。
First, the slag thickness 2 in the toped car 1
Is detected by measuring the positions (levels) of the hot metal 3 and the slag 4 using the respective sensors. That is, as shown in FIG. 1, two sensors are provided above the opening 7 of the torpedo car 1. Among these sensors, the slag sensor 5 is fixedly arranged at the reference position, but the hot metal sensor 6 is configured to be able to measure from the opening 7 even if the topped car 1 tilts. It is designed to be suspended vertically from a reference position. Thereby, the slag thickness is easily calculated by the following equation.

【0012】 Y=(X2+X3)−X1 …(1) ここで、 Y;スラグの厚み(mm) X1;基準位置からスラグ表面までの距離(mm) X2;溶銑用センサからスラグ下の溶銑表面までの距離
(mm) X3;基準位置から溶銑用センサまでの距離(mm) また、これらのセンサの種類は、本発明では限定するも
のではない。精度良く位置の測定が可能なものであれ
ば、如何なるものでも良い。但し、溶銑3及びスラグ4
は、1300℃以上の高温状態にあるので、非接触方式
のものであることが好ましい。その意味で、スラグ用セ
ンサ5は、他の製鉄工程で実績のあるマイクロ波式レベ
ル計を用いてスラグ位置の検出に、溶鉄用センサ6は、
渦電流式レベル計を用いて溶銑位置の検出に利用するの
が好ましい。マイクロ波式レベル計をスラグ用センサ5
として用いる時には、渦電流式レベル計と比べ遠方から
の計測が可能なため、図1のように基準位置に固設でき
る。一方、渦電流式レベル計を溶鉄用センサ6として用
いる時には、計測可能範囲まで接近できるように、昇降
自在な配置とする。
Y = (X2 + X3) -X1 (1) where, Y: thickness of slag (mm) X1: distance from reference position to slag surface (mm) X2: from hot metal sensor to hot metal surface under slag Distance (mm) X3; distance (mm) from the reference position to the hot metal sensor Also, the types of these sensors are not limited in the present invention. Any device can be used as long as it can accurately measure the position. However, hot metal 3 and slag 4
Is in a high-temperature state of 1300 ° C. or higher, and is preferably of a non-contact type. In that sense, the slag sensor 5 is used for detecting the slag position using a microwave level meter that has been used in other iron making processes, and the molten iron sensor 6 is used for detecting the slag position.
It is preferable to use the eddy current level meter for detecting the hot metal position. Microwave level meter with slag sensor 5
In the case of using as an eddy current type level meter, it can be measured from a distant place as compared with the eddy current type level meter, and can be fixed at a reference position as shown in FIG. On the other hand, when the eddy current type level meter is used as the sensor 6 for molten iron, it is arranged so as to be able to move up and down so that it can approach the measurable range.

【0013】次に、スラグ4の排滓であるが、それは、
図2(a)に示すように、排滓場の上記センサの配置位
置にトピード・カー1を搬送してからから開始する。ト
ピード・カー1が傾動しても、各センサ5,6がそれぞ
れスラグ溶銑の位置厚み2を連続的に監視可能な状態に
セットする。そして、上記のようにしてスラグ厚み2を
検出すると共に、トピード・カー1の傾動を開始して、
図2(b)に示すように、開口7よりスラグ鍋8へ排滓
する。トピード・カー1の傾動は、開口7の排滓側位置
が溶鉄3の位置を超えて下降せぬように、溶銑用センサ
6の情報をもとに行われる。傾動は、トラニオント軸
(図示せず)を回転させることで行い、溶銑を伴い流出
するような急激な排滓が生じないように、傾動速度の制
御がスラグ厚み2の検出値に応じて行われる。その後
は、該スラグ厚み2の検出値が小さくなれば、傾動速度
をさらに小さくして溶銑3の流出がないように排滓を制
御する。このように排滓することで、作業者の目視観察
なしでスラグ4の排滓が可能となる。なお、本発明で
は、スラグ厚み2の検出値が零になる直前で傾動を停止
し、トピード・カー1を正立させることにより、トピー
ド・カー1内のスラグ4はほぼ零にできる。参考のた
め、この排滓中のスラグ厚みの経時変化を図3に示しめ
しておく。排滓開始とともにスラグ用センサ5によるス
ラグ表面までの距離X1が増加(スラグ減少)し、X2
とX3の距離相当に達した時、スラグはほぼ零となる。
図中ハッチング部がスラグ厚みYである。なお、スラグ
厚み減少に伴い開口7から流出する排滓の量は僅かずつ
となるため、排滓量は作業能率、作業時間及びスラグ残
存量と予備処理時のコスト増加分を加味して排滓停止点
を決めれば良く、それぞれX1、X2、X3を求めるこ
とで残留量を制御することができる。
Next, the waste of the slag 4 is as follows.
As shown in FIG. 2A, the process starts after the torpedo car 1 is transported to the position where the above-mentioned sensor is disposed in the dumping place. Even if the torpedo car 1 tilts, each of the sensors 5 and 6 sets the position and thickness 2 of the slag hot metal to be continuously monitored. Then, while detecting the slag thickness 2 as described above, the tilting of the toped car 1 is started,
As shown in FIG. 2B, the waste is discharged from the opening 7 into the slag pot 8. The tilting of the torpedo car 1 is performed based on the information of the hot metal sensor 6 so that the position on the waste side of the opening 7 does not descend beyond the position of the molten iron 3. The tilting is performed by rotating a trunnion shaft (not shown), and the control of the tilting speed is performed according to the detected value of the slag thickness 2 so as not to generate a sudden waste such as flowing out with hot metal. . Thereafter, when the detected value of the slag thickness 2 becomes smaller, the tilting speed is further reduced and the waste is controlled so that the hot metal 3 does not flow out. By discharging the waste in this manner, the waste of the slag 4 can be discharged without visual observation by an operator. In the present invention, the slug 4 in the torpedo car 1 can be reduced to almost zero by stopping the tilting immediately before the detected value of the slag thickness 2 becomes zero and erecting the torpedo car 1. For reference, FIG. 3 shows a change with time of the slag thickness in the waste. With the start of the waste, the distance X1 to the slag surface by the slag sensor 5 increases (slag reduction), and X2
When the distance corresponding to the distance between X3 and X3 is reached, the slag becomes almost zero.
The hatched portion in the figure is the slag thickness Y. Since the amount of the waste flowing out of the opening 7 becomes small with the decrease in the slag thickness, the amount of the waste is determined by taking into account the work efficiency, the operation time, the remaining amount of the slag, and the cost increase at the time of the preliminary treatment. The stop point may be determined, and the residual amount can be controlled by obtaining X1, X2, and X3, respectively.

【0014】[0014]

【実施例】トピード・カー1内には、鋳床脱Si処理を
行った溶銑200トンと4トンのスラグが残留する。そ
して、このトピード・カー1から本発明に係る方法でス
ラグ鍋8への排滓を行なった。その際、センサとして
は、スラグ用にマイクロ波レベル計5、溶銑用に渦電流
式レベル計6を使用した。なお、後者は、昇降手段でス
ラグ面に近づけ、その基準点位置からの移動距離(X
2)は、アブソコーダーで測定した。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a torpedo car 1, 200 tons of hot metal and 4 tons of slag which have undergone casting bed de-Si treatment remain. Then, the waste from the toped car 1 to the slag pot 8 was discharged by the method according to the present invention. At that time, a microwave level meter 5 for slag and an eddy current type level meter 6 for hot metal were used as sensors. The latter is brought closer to the slag surface by the elevating means, and is moved (X distance) from the reference point position.
2) was measured with an Absocoder.

【0015】その結果、溶銑を流出させることなく、最
小のスラグ厚みを残すだけで、円滑に流滓が行なえた。
操業成績(残留スラグ量及び予備処理時の平均フラック
ス使用量)を、従来の作業者目視及びドラッガー利用の
方法での値を基準にして、図4(a)及び(b)に示
す。排滓は、作業者による排滓と同一時間内で達成した
時の残留スラグ量で比較した。図4(a)及び(b)よ
り、本発明に係る排滓方法が優れていることが明らかで
ある。
As a result, the sludge could be smoothly discharged without leaving the hot metal and leaving only the minimum slag thickness.
Operating results (residual slag amount and average flux usage during pre-treatment) are shown in FIGS. 4 (a) and 4 (b) on the basis of values obtained by conventional worker observation and dragger utilization. The waste was compared with the amount of residual slag when the waste was achieved within the same time as the waste by the operator. 4 (a) and 4 (b), it is clear that the waste disposal method according to the present invention is excellent.

【0016】[0016]

【発明の効果】以上述べたように、本発明により、作業
者が目視判断しなくても、従来より良好にトピード・カ
ーからの排滓が実施できるようになった。
As described above, according to the present invention, it is possible to more effectively discharge the waste from the torpedo car than before, without making a visual judgment by the operator.

【図面の簡単な説明】[Brief description of the drawings]

【図1】スラグ厚みの検出を説明する縦断面図である。FIG. 1 is a longitudinal sectional view illustrating detection of slag thickness.

【図2】本発明に係るトピード・カーからの排滓方法を
示す図であり、(a)は排滓開始前、(b)は排滓中の
状況である。
FIGS. 2A and 2B are diagrams showing a method of discharging waste from a torpedo car according to the present invention, wherein FIG.

【図3】本発明の実施中におけるスラグ厚みの経時変化
を示す図である。
FIG. 3 is a diagram showing a change with time of a slag thickness during implementation of the present invention.

【図4】本発明の実施成績を従来方法での値と比較した
図であり、(a)は残留スラグ量、(b)は溶銑予備処
理時の平均フラックス使用量を示す。
FIGS. 4A and 4B are diagrams comparing the performance of the present invention with values obtained by a conventional method, wherein FIG. 4A shows the amount of residual slag, and FIG. 4B shows the average amount of flux used during hot metal pretreatment.

【符号の説明】[Explanation of symbols]

1 トピード・カー 2 スラグ厚み 3 溶銑 4 スラグ 5 スラグ用センサ(マイクロ波式レベル計) 6 溶銑用センサ(渦電流式レベル計) 7 開口 8 スラグ鍋 DESCRIPTION OF SYMBOLS 1 Topeed car 2 Slag thickness 3 Hot metal 4 Slag 5 Slag sensor (microwave type level meter) 6 Hot metal sensor (eddy current type level meter) 7 Opening 8 Slag pot

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2F069 AA46 BB40 DD16 GG06 GG08 GG59 HH09 HH30 KK08 NN00 4K014 AD06 AD17  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F069 AA46 BB40 DD16 GG06 GG08 GG59 HH09 HH30 KK08 NN00 4K014 AD06 AD17

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 トピード・カー内で溶銑上に滞留するス
ラグを、該トピード・カーを傾動し、その天井に設けた
開口より排出するトピード・カーからの排滓方法におい
て、 前記開口の上方に、溶銑とスラグの高さを別々に検知す
るセンサを設けてスラグ厚みの検出を行い、その検出値
に応じてトピード・カーを傾動させ、スラグ厚みを検出
しつつ排滓することを特徴とするトピード・カーからの
排滓方法。
1. A method for draining slag remaining on hot metal in a torpedo car from a torpedo car by tilting the torpedo car and discharging the slag from an opening provided in a ceiling thereof, It is characterized by providing a sensor for separately detecting the height of the hot metal and the slag, detecting the slag thickness, tilting the torpedo car according to the detected value, and discharging while detecting the slag thickness. Dumping method from topid car.
【請求項2】 前記高さを検知するセンサを、溶銑用に
は渦電流式レベル計、スラグ用にはマイクロ波式レベル
計とすることを特徴とする請求項1記載のトピード・カ
ーからの排滓方法。
2. A topped car according to claim 1, wherein said height detecting sensor is an eddy current level meter for hot metal and a microwave level meter for slag. Waste method.
JP11079375A 1999-03-24 1999-03-24 Method for removing slag from torpedo car Withdrawn JP2000273519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11079375A JP2000273519A (en) 1999-03-24 1999-03-24 Method for removing slag from torpedo car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11079375A JP2000273519A (en) 1999-03-24 1999-03-24 Method for removing slag from torpedo car

Publications (1)

Publication Number Publication Date
JP2000273519A true JP2000273519A (en) 2000-10-03

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007077481A (en) * 2005-09-16 2007-03-29 Nippon Steel Corp Method for removing slag in converter
JP2007077483A (en) * 2005-09-16 2007-03-29 Nippon Steel Corp Steelmaking method in converter
WO2014115526A1 (en) * 2013-01-24 2014-07-31 Jfeスチール株式会社 Preliminary processing method for molten iron
CN114234880A (en) * 2020-09-09 2022-03-25 南京宝地梅山产城发展有限公司 Online monitoring method for lining thickness of torpedo tank refractory material

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007077481A (en) * 2005-09-16 2007-03-29 Nippon Steel Corp Method for removing slag in converter
JP2007077483A (en) * 2005-09-16 2007-03-29 Nippon Steel Corp Steelmaking method in converter
JP4533293B2 (en) * 2005-09-16 2010-09-01 新日本製鐵株式会社 Converter discharge method
WO2014115526A1 (en) * 2013-01-24 2014-07-31 Jfeスチール株式会社 Preliminary processing method for molten iron
JP5761459B2 (en) * 2013-01-24 2015-08-12 Jfeスチール株式会社 Hot metal pretreatment method
CN104955965A (en) * 2013-01-24 2015-09-30 杰富意钢铁株式会社 Preliminary processing method for molten iron
TWI576437B (en) * 2013-01-24 2017-04-01 杰富意鋼鐵股份有限公司 Method for preliminary treatment of molten iron
CN114234880A (en) * 2020-09-09 2022-03-25 南京宝地梅山产城发展有限公司 Online monitoring method for lining thickness of torpedo tank refractory material

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