JP2928600B2 - Oxygen blowing apparatus and method - Google Patents
Oxygen blowing apparatus and methodInfo
- Publication number
- JP2928600B2 JP2928600B2 JP2179039A JP17903990A JP2928600B2 JP 2928600 B2 JP2928600 B2 JP 2928600B2 JP 2179039 A JP2179039 A JP 2179039A JP 17903990 A JP17903990 A JP 17903990A JP 2928600 B2 JP2928600 B2 JP 2928600B2
- Authority
- JP
- Japan
- Prior art keywords
- lance pipe
- molten steel
- oxygen gas
- oxygen
- back pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、平炉、転炉などの各種製鋼法の溶解期あ
るいは酸化精練期に、酸素源として酸素ガス、すなわち
酸素を含む気体を用いて鋼を溶製する酸素吹精装置及び
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention uses an oxygen gas, that is, a gas containing oxygen, as an oxygen source during the melting period or the oxidizing refining period of various steelmaking methods such as open hearth furnaces and converters. TECHNICAL FIELD The present invention relates to an oxygen blowing apparatus and method for melting steel.
［従来の技術］ 従来、上記のような酸素吹精は、炉の挿入口ののぞき
穴から炉内に挿入したランスパイプを通して酸素を直接
炉内の溶鋼の表面に吹き付けるなどの方法で行なわれて
いた。[Prior Art] Conventionally, the oxygen blowing as described above is performed by a method such as blowing oxygen directly onto the surface of molten steel in a furnace through a lance pipe inserted into the furnace from a peephole of an inlet of the furnace. Was.
しかし、近年、より効率的な方法として、ランスパイ
プを溶鋼中に挿入し、このランスパイプを通して溶鋼中
に酸素を吹き入れる吹精法が行われている。However, in recent years, as a more efficient method, a blowing method has been performed in which a lance pipe is inserted into molten steel and oxygen is blown into the molten steel through the lance pipe.
この吹精法においては、溶鋼中に挿入したランスパイ
プが経時的に溶融し、寸法が短くなってしまうので、適
宜ランスパイプを溶鋼中に送り込む作業が必要である。
従来は、これを、溶鋼中の酸素ガスの吹き込み音の変化
などを頼りにして人手によりランスパイプ挿入深さの補
正を行っていた。In this blowing method, since the lance pipe inserted into the molten steel melts with time and the dimensions become short, it is necessary to appropriately feed the lance pipe into the molten steel.
Conventionally, the lance pipe insertion depth has been manually corrected by relying on changes in the blowing sound of oxygen gas in molten steel.
［発明が解決しようとする課題］ しかしながら、上記のような従来の技術においては、
パイプ侵入深さの補正を操作者が経験と知覚に基づいて
行なっているので、作業の手間がかかるだけでなく、操
作者の熟練度などに応じてバラツキが生じ、侵入深さが
一定となりにくく、極端な場合には、溶鋼の表面より上
に出てしまう。侵入深さが適正でないと酸素ガスの溶鋼
との反応効率が低下するほか、製品の品質にもバラツキ
が生じてしまう。[Problems to be Solved by the Invention] However, in the above-described conventional technology,
Since the pipe penetration depth is corrected by the operator based on experience and perception, not only does it take time and effort to work, but it also varies depending on the skill level of the operator, making it difficult for the penetration depth to be constant. In extreme cases, it will come out above the surface of the molten steel. If the penetration depth is not appropriate, the reaction efficiency of the oxygen gas with the molten steel decreases, and the quality of the product also varies.
この発明は上記事情に鑑みてなされたもので、ランス
パイプの溶鋼中への侵入深さの調整を自動的に行なうこ
とのできる酸素吹精装置及び方法を提供するものであ
る。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oxygen blowing apparatus and a method capable of automatically adjusting the penetration depth of a lance pipe into molten steel.
［課題を解決するための手段］ 第１請求項の発明は、ランスパイプを炉内の溶鋼に向
けて出し入れ自在に保持する保持装置と、このランスパ
イプに酸素ガスを供給して溶鋼中に噴出させる供給装置
とを備え、上記供給装置にはランスパイプにおける酸素
ガスの背圧を測定する素圧測定装置が設けられ、上記保
持装置には背圧測定装置の測定値に基づいてランスパイ
プの溶鋼中への侵入深さを調整する制御機構が設けられ
ていることを特徴とする酸素吹精装置である。[Means for Solving the Problems] According to the first aspect of the present invention, there is provided a holding device for holding a lance pipe so as to be able to be taken in and out of molten steel in a furnace, and an oxygen gas is supplied to the lance pipe and injected into the molten steel. A supply device for measuring the back pressure of oxygen gas in the lance pipe, and the holding device is provided with a source pressure measuring device for measuring the back pressure of the oxygen gas in the lance pipe. An oxygen insemination apparatus characterized by being provided with a control mechanism for adjusting a penetration depth into the inside.
第２請求項の発明は、炉内の溶鋼中にランスパイプを
侵入させ、このランスパイプに酸素ガスを供給して溶鋼
の吹精を行う酸素吹精方法において、上記ランスパイプ
における酸素ガスの背圧を測定し、この測定値に基づい
てランスパイプの溶鋼中への侵入深さを調整することを
特徴とする酸素吹精方法である。According to a second aspect of the present invention, there is provided an oxygen blowing method for injecting a lance pipe into molten steel in a furnace and supplying oxygen gas to the lance pipe to blow molten steel. This is an oxygen blowing method characterized by measuring the pressure and adjusting the penetration depth of the lance pipe into the molten steel based on the measured value.
［作用］ 酸素ガス源の圧力が一定である場合でも、ランスパイ
プの背圧は酸素ガスの流れの抵抗によって変化する。す
なわち、ランスパイプの先端が溶解して短くなると、溶
鋼中への侵入深さも小さくなり、酸素ガスの噴射抵抗が
小さくなってランスパイプの背圧も小さくなる。従っ
て、この背圧の値から侵入深さを推定することができ、
これに基づいてランスパイプの保持装置を制御すれば、
ランスパイプのの長さをその都度チェックすることなし
にランスパイプの侵入深さを好ましい値に保つことがで
きる。[Operation] Even when the pressure of the oxygen gas source is constant, the back pressure of the lance pipe changes due to the resistance of the flow of the oxygen gas. That is, when the tip of the lance pipe is melted and shortened, the depth of penetration into the molten steel also decreases, the injection resistance of oxygen gas decreases, and the back pressure of the lance pipe also decreases. Therefore, the penetration depth can be estimated from the value of the back pressure,
If the lance pipe holding device is controlled based on this,
The desired penetration depth of the lance pipe can be maintained without having to check the length of the lance pipe each time.
［実施例］ 以下、この発明を図面を参照して説明する。Hereinafter, the present invention will be described with reference to the drawings.
第１図に示すのは、この発明の一実施例の酸素吹精装
置であり、炉１に対して前後に移動自在に配された台車
２と、この台車２上に配置されてランスパイプ３を溶鋼
に対して出し入れ自在に保持する保持装置４と、このラ
ンスパイプ３に酸素ガスを送る酸素ガス供給装置５とを
備えて構成されている。FIG. 1 shows an oxygen blowing device according to an embodiment of the present invention, a truck 2 arranged to be movable back and forth with respect to a furnace 1, and a lance pipe 3 arranged on the truck 2. And a oxygen gas supply device 5 for sending oxygen gas to the lance pipe 3.
保持装置４は、台車２の前端に突設された支持部材６
の先端にピン結合されて垂直面内にて回動自在に支持さ
れた長尺フレーム状の支持台７と、この支持台７に長手
方向に摺動自在に載置されたホルダ８と、支持台７に沿
ってホルダ８を移動させる繰出し装置９と、支持台７の
傾度角度を変える傾動装置10を備えている。The holding device 4 includes a support member 6 protruding from the front end of the carriage 2.
A long frame-shaped support base 7 which is pin-coupled to the tip of the base and is rotatably supported in a vertical plane; a holder 8 slidably mounted on the support base 7 in the longitudinal direction; It has a feeding device 9 for moving the holder 8 along the table 7 and a tilt device 10 for changing the tilt angle of the support table 7.
ホルダ８は、支持台７にその長手方向に沿って形成さ
れた凹溝に嵌合する凸部（いずれも図示略）を備えてお
り、これによって支持台７に沿って摺動自在とされてい
る。ホルダ８はランスパイプ３を着脱自在に支持するカ
ップラ11を備え、また、ランスパイプ３はフレキシブル
ホース12を介して酸素ガス供給装置５に接続されてい
る。The holder 8 is provided with a convex portion (both not shown) that fits into a concave groove formed on the support base 7 along the longitudinal direction, and is thereby slidable along the support base 7. I have. The holder 8 includes a coupler 11 that detachably supports the lance pipe 3, and the lance pipe 3 is connected to the oxygen gas supply device 5 via a flexible hose 12.
繰出し装置９は、支持台７の両端に設けられたスプロ
ケット13a,13bと、これに無端状に巻回されるとともに
ホルダにスポット固定されたチェーン14と、支持台７の
後端に設けられてスプロケット13bを回転駆動するモー
タ15とから構成され、ホルダ８を傾動台に沿って移動さ
せるようになっている。The feeding device 9 includes sprockets 13a and 13b provided at both ends of the support base 7, a chain 14 wound endlessly and spot-fixed to a holder, and provided at a rear end of the support base 7. And a motor 15 for rotating and driving the sprocket 13b, so that the holder 8 is moved along the tilting table.
上記ランスパイプ３は、例えば、外径約50mm、内径約
40mmの鋼管で、長さは、溶鋼中で溶融する分を見込んで
所定時間使用できるように5.5m程度に設定されている。The lance pipe 3 has, for example, an outer diameter of about 50 mm and an inner diameter of about 50 mm.
The length of a 40 mm steel pipe is set to about 5.5 m so that it can be used for a predetermined time in anticipation of melting in molten steel.
上記カップラ11は電気または流体圧によって径が縮小
自在とされており、ランスパイプ３の着脱を自動的に行
なうことができる。The diameter of the coupler 11 can be reduced by electricity or fluid pressure, and the lance pipe 3 can be automatically attached and detached.
傾動装置10は、上記支持台７のほぼ中央下面と台車２
上面にそれぞれ両端を枢着させて取り付けられたパワー
シリンダにより構成されており、このパワーシリンダを
作動させることによって、支持台７の傾斜角度を変え、
ランスパイプ３の炉内への挿入角度を変えることができ
るようになっている。The tilting device 10 is provided between the lower surface of the support 7 and the carriage 2.
It is composed of a power cylinder attached to the upper surface with both ends pivotally attached. By operating this power cylinder, the inclination angle of the support base 7 is changed,
The insertion angle of the lance pipe 3 into the furnace can be changed.
上記酸素ガス供給装置５は、図示しない酸素ガス源か
らの酸素ガスの圧力を適当な値に下げる圧力調整器16、
絞り弁17及び上記フレキシブルホース12を備えた供給流
路18と、この供給流路18に付設された制御機構19から成
っている。The oxygen gas supply device 5 includes a pressure regulator 16 for reducing the pressure of oxygen gas from an oxygen gas source (not shown) to an appropriate value.
The supply channel 18 includes a throttle valve 17 and the flexible hose 12, and a control mechanism 19 attached to the supply channel 18.
制御機構19は、絞り弁17の前後に設けられた圧力信号
変換器20,21と、これに順次接続された差動回路22、増
幅器23及び繰出し装置９のモータ15から構成されてい
る。圧力信号変換器20,21は圧力を電気信号に変換する
空電変換器であり、圧電素子を用いたセンサでもよい。
この制御機構19は、圧力信号変換器20の直後の流路内の
圧力poを基準とし、この基準圧力poと絞り弁17の直後の
圧力（ランスパイプの背圧）ｐの差を検出し、この値が
設定範囲にある間はモータ15の駆動信号を出力せず、そ
の範囲の外にあるときにモータ15の駆動信号を出力する
ものである。The control mechanism 19 includes pressure signal converters 20 and 21 provided before and after the throttle valve 17, and a differential circuit 22, an amplifier 23 and a motor 15 of the feeding device 9 which are sequentially connected to the pressure signal converters 20 and 21. The pressure signal converters 20, 21 are pneumatic converters for converting pressure into electric signals, and may be sensors using piezoelectric elements.
The control mechanism 19 detects a difference between the reference pressure p o and the pressure (back pressure of the lance pipe) p immediately after the throttle valve 17 based on the pressure p o in the flow path immediately after the pressure signal converter 20. However, the drive signal of the motor 15 is not output while the value is within the set range, and the drive signal of the motor 15 is output when the value is out of the range.
以下、上記のように構成された酸素吹精装置により吹
精を行う方法を説明する。Hereinafter, a method of performing insemination by the oxygen insemination device configured as described above will be described.
パワーシリンダ10を作動させて支持台７をほぼ水平に
し、モータ15に作動させてホルダ８を支持台７の後端に
移動させた状態でランスパイプ３をカップラ11に固定す
る。台車２を所定の位置に移動した後、支持台７を炉１
の装入口1aに対応した所定の角度に傾動させ、モータ15
を駆動してホルダ８を前進させる。最初のランスパイプ
３の溶鋼Ｍへの侵入深さは、マニュアル操作によって、
予め決められた最適の値、第２図に示すh1となるように
設定する。溶鋼への侵入と同時に酸素ガス供給装置５の
メインバルブ（図示略）を開いて酸素ガスを供給し、ま
た、モータ15の駆動をオートマチックに切り替える。The lance pipe 3 is fixed to the coupler 11 while the holder 8 is moved to the rear end of the support base 7 by operating the power cylinder 10 to make the support base 7 substantially horizontal, and operating the motor 15 to move the holder 8 to the rear end. After moving the carriage 2 to a predetermined position, the support table 7 is moved to the furnace 1.
The motor 15 is tilted at a predetermined angle corresponding to the
To move the holder 8 forward. The penetration depth of the first lance pipe 3 into the molten steel M is determined by manual operation.
Predetermined optimum value, set to be h 1 shown in Figure 2. Simultaneously with the intrusion into the molten steel, the main valve (not shown) of the oxygen gas supply device 5 is opened to supply the oxygen gas, and the drive of the motor 15 is automatically switched.
なお、必要に応じて台車２の移動中から支持台７の傾
動及びホルダ８の前進を行わせ、当初からランスパイプ
３の侵入の深さを自動的に決めるようにしておくことも
できる。If necessary, the support base 7 can be tilted and the holder 8 can be moved forward while the carriage 2 is moving, so that the depth of penetration of the lance pipe 3 can be automatically determined from the beginning.
この状態では、溶鋼の静圧（ρh1:ρは溶鋼の比重）
がランスパイプ３の先端に作用するため、基準圧力poと
背圧ｐの差は小さい。In this state, the static pressure of the molten steel (ρh 1 : ρ is the specific gravity of the molten steel)
Acts on the tip of the lance pipe 3, so that the difference between the reference pressure p o and the back pressure p is small.
吹精の進行に伴い、ランスパイプ３の先端が溶融し
て、第３図に示すように短くなり、さらには第４図のよ
うに先端が溶鋼Ｍの表面より上になってしまう。この発
明では、侵入深さが第３図に示すh2となると、静圧が
（h1−h2）ρだけ減り、その分基準圧力poと背圧ｐの差
が大きくなる。この（po−ｐ）の値が所定の設定値を越
えると制御機構19の増幅器23から繰出し装置９のモータ
15に作動信号が出され、モータ15が作動してホルダ８が
前進する。すると、ランスパイプ３の侵入深さが大きく
なって、第２図の状態に戻り、（po−ｐ）の値も小さく
なり、設定範囲内に来ると駆動信号の出力が止まる。With the progress of the blowing, the tip of the lance pipe 3 is melted and shortened as shown in FIG. 3, and further the tip becomes higher than the surface of the molten steel M as shown in FIG. In the present invention, the penetration depth is h 2 shown in FIG. 3, reduced by the static pressure (h 1 -h 2) ρ, the difference between the amount the reference pressure p o and the back pressure p increases. When the value of (p o -p) exceeds a predetermined set value, the motor of the feeding device 9 is fed from the amplifier 23 of the control mechanism 19.
An operation signal is output to the motor 15 and the motor 15 operates to move the holder 8 forward. Then, the penetration depth of the lance pipe 3 increases, the state returns to the state of FIG. 2, and the value of (p o -p) also decreases. When the value falls within the set range, the output of the drive signal stops.
このようにして、ホルダ８が前進限界に達するまで上
記の過程が繰り返され、ランスパイプ３の侵入深さが常
に一定の範囲にあるように制御される。In this manner, the above process is repeated until the holder 8 reaches the forward limit, and the penetration depth of the lance pipe 3 is controlled so as to be always within a certain range.
本発明は、ランスパイプ３の侵入深さを炉１を基準と
して決めるのではなく、溶鋼Ｍの表面に対して直接位置
決めするので、溶鋼量自体が増減したような場合でも、
ランスパイプ３が自動的に追随して所定の侵入深さを保
つことができる。In the present invention, since the penetration depth of the lance pipe 3 is not determined based on the furnace 1 but is positioned directly on the surface of the molten steel M, even if the amount of molten steel itself increases or decreases,
The lance pipe 3 can automatically follow and maintain a predetermined penetration depth.
［発明の効果］ 以上詳述したように、この発明によれば、簡単な構成
により、ランスパイプの侵入深さが常に一定の範囲にあ
るように自動的に制御されるので、作業が大幅に省力化
されるとともに、操作者の勘や、経験に頼ることなく、
酸素ガスの溶鋼との反応を安定的に行わせることがで
き、吹精作業の能率を向上させるとともに製品の品質を
安定化するという優れた効果を奏するものである。[Effects of the Invention] As described in detail above, according to the present invention, with a simple configuration, the depth of penetration of the lance pipe is automatically controlled so as to always be within a certain range, so that the work is greatly reduced. Labor saving and without relying on the intuition and experience of the operator,
It is possible to stably react oxygen gas with molten steel, thereby improving the efficiency of the blowing operation and stabilizing the quality of the product.
第１図はこの発明の酸素吹精装置の一実施例を示す図、
第２図ないし第４図はこの発明の酸素吹精装置の制御機
構及び吹精方法を示す図である。 １……炉、３……ランスパイプ、 ４……保持装置、19……制御機構、 21……圧力信号変換器（背圧測定器）、 Ｍ……溶鋼。FIG. 1 is a diagram showing one embodiment of an oxygen blowing device of the present invention,
FIG. 2 to FIG. 4 are views showing a control mechanism and a blowing method of the oxygen blowing apparatus of the present invention. 1 ... furnace, 3 ... lance pipe, 4 ... holding device, 19 ... control mechanism, 21 ... pressure signal converter (back pressure measuring device), M ... molten steel.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塚本 尚能 神奈川県逗子市山の根３―８―15 (72)発明者 入沢 昭三 北海道札幌市北区新琴似二条12丁目１― 15 (72)発明者 斉藤 貞之 千葉県千葉市東本町８―５ (56)参考文献 特開 昭59−56513（ＪＰ，Ａ) 実開 昭63−172900（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) C21C 5/46 C21C 5/52 C21C 7/00 F27D 21/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naono Tsukamoto 3-8-15 Yamane, Zushi City, Kanagawa Prefecture (72) Inventor Shozo Irizawa 12-1-15 Shinkotoni Nijo 2-chome, Kita-ku, Sapporo City, Hokkaido (72) Inventor Saito Sadayuki 8-5 Higashihonmachi, Chiba City, Chiba Pref. (56) References JP-A-59-56513 (JP, A) JP-A-63-172900 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB Name) C21C 5/46 C21C 5/52 C21C 7/00 F27D 21/00
Claims (2)
れ自在に保持する保持装置と、このランスパイプに酸素
ガスを供給して溶鋼中に噴出させる供給装置とを備え、 上記供給装置にはランスパイプにおける酸素ガスの背圧
を測定する背圧測定装置が設けられ、 この背圧測定装置の測定値に基づいてランスパイプの溶
鋼中への侵入深さを調整する制御機構が設けられている
ことを特徴とする酸素吹精装置。1. A holding device for holding a lance pipe so as to be able to be taken in and out of molten steel in a furnace, and a supply device for supplying oxygen gas to the lance pipe and ejecting the lance pipe into the molten steel. A back pressure measuring device for measuring the back pressure of oxygen gas in the lance pipe is provided, and a control mechanism for adjusting a penetration depth of the lance pipe into the molten steel based on a measured value of the back pressure measuring device is provided. An oxygen blowing device characterized by the above-mentioned.
このランスパイプに酸素ガスを供給して溶鋼の吹精を行
う酸素吹精方法において、 上記ランスパイプにおける酸素ガスの背圧を測定し、こ
の測定値に基づいてランスパイプの溶鋼中への侵入深さ
を調整することを特徴とする酸素吹精方法。2. A lance pipe penetrates into molten steel in a furnace,
In the oxygen blowing method in which oxygen gas is supplied to the lance pipe to blow molten steel, the back pressure of the oxygen gas in the lance pipe is measured, and the penetration depth of the lance pipe into the molten steel is measured based on the measured value. An oxygen blowing method characterized by adjusting the length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179039A JP2928600B2 (en) | 1990-07-06 | 1990-07-06 | Oxygen blowing apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179039A JP2928600B2 (en) | 1990-07-06 | 1990-07-06 | Oxygen blowing apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0466613A JPH0466613A (en) | 1992-03-03 |
| JP2928600B2 true JP2928600B2 (en) | 1999-08-03 |
Family
ID=16059049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2179039A Expired - Fee Related JP2928600B2 (en) | 1990-07-06 | 1990-07-06 | Oxygen blowing apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2928600B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100895087B1 (en) * | 2002-12-02 | 2009-04-28 | 주식회사 포스코 | Apparatus for measuring the deposit depth of lance and preventing lance from bending |
| CN101709351B (en) * | 2009-11-28 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Method for oxygen blast of electric furnace |
| WO2020096157A1 (en) * | 2018-11-07 | 2020-05-14 | 에이블맥스(주) | Device for controlling end position of oxygen lance in electric furnace |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011006876A1 (en) * | 2011-04-06 | 2012-10-11 | Sms Siemag Ag | Method for operating at least one supersonic nozzle in a metallurgical vessel, method for determining a pressure loss, and system for determining operating parameters of at least one supersonic nozzle |
| JP5884189B2 (en) * | 2013-05-10 | 2016-03-15 | Ｊｆｅスチール株式会社 | Immersion lance equipment for hot metal pretreatment and gas switching method for immersion lance for hot metal pretreatment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA835649B (en) * | 1982-08-25 | 1984-04-25 | British Steel Corp | Lancing in electric arc steelmaking |
| JPS63172900U (en) * | 1987-04-30 | 1988-11-10 |
-
1990
- 1990-07-06 JP JP2179039A patent/JP2928600B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100895087B1 (en) * | 2002-12-02 | 2009-04-28 | 주식회사 포스코 | Apparatus for measuring the deposit depth of lance and preventing lance from bending |
| CN101709351B (en) * | 2009-11-28 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Method for oxygen blast of electric furnace |
| WO2020096157A1 (en) * | 2018-11-07 | 2020-05-14 | 에이블맥스(주) | Device for controlling end position of oxygen lance in electric furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0466613A (en) | 1992-03-03 |
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