JPS62174314A - Detection of slag outflow from converter - Google Patents
Detection of slag outflow from converterInfo
- Publication number
- JPS62174314A JPS62174314A JP1427886A JP1427886A JPS62174314A JP S62174314 A JPS62174314 A JP S62174314A JP 1427886 A JP1427886 A JP 1427886A JP 1427886 A JP1427886 A JP 1427886A JP S62174314 A JPS62174314 A JP S62174314A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- slag
- tapping
- molten steel
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000010079 rubber tapping Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分！１１ｆ）
本発明は、転炉での出鋼過程において、溶鋼とスラグを
判別し、スラグの流出を最小限とするための転炉スラグ
流出検知方法に関する。Detailed Description of the Invention (Industrial Application! 11f) The present invention is a method for distinguishing between molten steel and slag in the steel tapping process in a converter and minimizing the flow of slag from the converter. Regarding the detection method.
（従来の技術）
この種の転炉は、梢錬完１′後に転炉傾動装置によって
か休を傾動し、出鋼１１から取鍋へ溶鋼を門人するもの
であるか、該ｌ１人１１１ｊにスラグの混入か避は難（
、そのためスラグの混入を避けるためのル出停止１・、
の時期を決定すへく、過去種々のスラグｌイご出検知方
法が提案されている。(Prior art) In this type of converter, the converter is tilted by a converter tilting device after the top refining is completed, and the molten steel is transferred from the tap 11 to the ladle. It is difficult to avoid slag mixing (
, Therefore, to avoid mixing of slag, stop the flow 1.
Various methods for detecting slag have been proposed in the past to determine the timing.
例えば特１５ｊ１昭５３−１３８９０７Ｓ）°公報に開
示のものは、ｔｌ：出末期における出鋼１−１がらの１
１−川流の輻射エネルギーを波長０．７５〜２．００μ
ｍｎのエネルギーを透過する光学的フィルタを介し輻射
エネルギー測定装置で起電力として測定を継続し、その
測定中の値が定められた基準値を超えた時に、スラグ流
出を検知するようにしている。For example, what is disclosed in the Special Publication No. 15j1 1989-138907S) is tl: 1 of 1-1 scraps at the end of production.
1- Radiant energy of river current at wavelength 0.75~2.00μ
The radiant energy measuring device continues to measure the electromotive force through an optical filter that transmits the energy of mn, and when the value being measured exceeds a predetermined reference value, slag outflow is detected.
また、実開昭５５−３７８２８５ン公報に開示のものは
、放射〆温度計で出鋼流を観測し、その得られる起電力
か溶１Ｍ流とスラグ混入流上では差があることを利用し
、溶鋼流の起電力波形を・１ｉｔけ化処理してノ、（９
値を設定し、このへ専値を検：１旨！Ｉｌ１度がｔ秒間
継続して晟えることによりスラグ混人流を検知するよう
にしたものである。In addition, the method disclosed in Japanese Utility Model Publication No. 55-378285 observes the tapping flow with a radiation thermometer, and utilizes the fact that there is a difference in the electromotive force obtained between the molten 1M flow and the slag mixed flow. , by processing the electromotive force waveform of the molten steel flow into 1it scale, (9
Set the value and check the special value: 1! A mixed flow of slag is detected by the temperature of Il1 degrees continuing for t seconds.
（発明か解決しようとする問題点）
しかるに１・記従未力法のうち、前者は溶鋼流出初期の
溶湯〆＋、、ｌ 匹によって）、Ｉ；’／値を設定して
いるが、出鋼中の発煙等による起電力のバラノキを同避
する丁°段が必°及となる。また後者も、出′Ｍ流の幅
変動、炉体傾動角１徒の変化による起電力のバラツキを
回避するため、スリ、トおよび反射鏡を必波とし、設備
面の制約および費用がかさむ問題かあった。(Problem to be solved by the invention) However, among the control methods described in 1., the former sets the value of I; A step is required to avoid the generation of electromotive force due to smoke generation in the steel. In addition, in the latter case, in order to avoid variations in the electromotive force due to variations in the width of the output flow and changes in the tilt angle of the furnace body, a slot, a groove, and a reflector are required, which poses problems in terms of equipment constraints and increased costs. There was.
以１−の点に鑑み本発明は、出鋼中の発煙、炉体傾動角
度の変化、出鋼流の幅変動等による輻射エネルギーのバ
ラツキを回避し、適確に転炉スラグの流出を検知する方
法の提供を目的とする。In view of the above point 1-, the present invention avoids variations in radiant energy due to smoke generation during tapping, changes in the tilting angle of the furnace body, fluctuations in the width of the tapping flow, etc., and accurately detects the outflow of converter slag. The purpose is to provide a method to do so.
（問題点を解決するためのＬ段）
本発明は、転炉での出鋼過稈において、出鋼流の輻射エ
ネルギーを、波長２．１〜２．３μｔｎのエネルギーが
透過する光学的フィルタを介し放射温度１；１によって
連続的に測定し、輝度温度のリアル値と移動・ｌ’均値
（）、（９値として用いる）との比較により、溶鋼とス
ラグとを判別し、スラグ流出を検知する転炉スラグ流出
検知方法を特徴とする（実施例）
以ド、本発明を第１図を用いて説明する。(L stage for solving the problem) The present invention provides an optical filter that transmits the radiant energy of the tapping flow at a wavelength of 2.1 to 2.3 μtn during over-culm tapping in a converter. The radiation temperature is measured continuously by 1:1, and by comparing the real value of the brightness temperature with the moving/l' average value (), (used as a 9 value), it is possible to distinguish between molten steel and slag, and to prevent slag outflow. Features of Converter Slag Outflow Detection Method (Example) The present invention will be described below with reference to FIG. 1.
第１図において、転炉（１）は転炉傾動装置（２）によ
り傾動され、内部の溶ｍ（３）を取鍋（４）に出鋼する
。また、転炉（１）内の溶鋼（３）の１一層にスラグ（
５）が比１刊差にｌ’？、 ｌ−、Ｌ、でいる。そして
、１゛、記出鋼末期に転炉（１）より出た溶鋼の輻射エ
ネルギーが、波長２．１〜２．３μｍのエネルギー（輝
度ｌ！ｌマ度）のみを透過させる光学的フィルタ（６）
を介し放射ｉｔ！ｌＩｉ度、１ｌ（７）で連続的に測定
され、その起電力が信弓処理装置（８）に入力される。In FIG. 1, a converter (1) is tilted by a converter tilting device (2), and the molten metal (3) inside is tapped into a ladle (4). In addition, slag (
5) Is there a difference of 1 issue? , l-,L,. 1゛, the radiant energy of the molten steel coming out of the converter (1) at the end of the recorded steel period is an optical filter that transmits only energy with a wavelength of 2.1 to 2.3 μm (brightness l!l magnification). 6)
Radiates through it! The electromotive force is continuously measured at 11 degrees and 11 degrees (7), and the electromotive force is inputted to the bow processing device (8).
この信弓処理装置（８）は輝度温度のリアル値と移動平
均値との比較においてスラグ流を検出するもので、具体
的には第２図の起電力波形に示すように、放射温度計（
７）の出力値が約２倍（この値は任、コ（に設定可能で
ある）になってスラグ（５）が流出開始しだしたことを
判別する機能を具備している。尚、本発明において、輻
射エネルギーの測定に用いる光学的フィルタ（６）の通
過範囲を２．１〜２．３μｍとしたのは、以ドの関係式
により、波長が大きく、【ｌ値が小さい程ΔＳをより良
く検出できるためである。This Shinyumi processing device (8) detects the slag flow by comparing the real value of the brightness temperature with the moving average value. Specifically, as shown in the electromotive force waveform in Figure 2, the radiation thermometer (
It is equipped with a function to determine when the output value of 7) has doubled (this value can be set at any time) and the slag (5) has begun to flow out. In the invention, the passage range of the optical filter (6) used for measuring radiant energy is set to 2.1 to 2.3 μm because the wavelength is large and [the smaller the l value, the smaller the ΔS. This is because it can be detected better.
Ｓ ：輝度？！＋＋１度 ［Ｋコ
ΔＳ ：輝度ｉ７．．１度変化 ［Ｋコｎ：ｎ値
Ｃ１：放射の第２定数（０，０１４３８８） ［ｍ
−ＫｌＴ：１°［、７，，１度 ［Ｋ］
λ ：波長 ［ｍコ
と ：放射率
一方、１−記信号処理装置（８）の出力は前述の転炉傾
動装置（２）に−ノ゛えられ、スラグの検出によって自
動的に転炉（１）を仄し、出鋼を終了させる。S: Brightness? ! ++1 degree [KkoΔS: Brightness i7. ．． 1 degree change [K n: n value C1: second constant of radiation (0,014388) [m
-KlT: 1° [, 7,, 1 degree [K] λ: wavelength [mco]: emissivity On the other hand, the output of the signal processing device (8) described in 1- is sent to the converter tilting device (2) mentioned above. When slag is detected, the converter (1) is automatically turned on and the tapping is completed.
ド記第１表は、オペレータの１１視判定方法によって得
られたスラグ流出検出結果と本発明方法によって得られ
たスラグ流出検出結果との比較表である。Table 1 is a comparison table of the slag outflow detection results obtained by the operator's 11 visual judgment method and the slag outflow detection results obtained by the method of the present invention.
第１表
この表から明らかなように、本発明方法によれば取鍋内
へのスラグ流出；、１を低減することができ、またこれ
に伴い合金元素の歩留向１・４、復（Ｐ）防由、取鍋寿
命の延長等の効果が１１ノられた。Table 1 As is clear from this table, according to the method of the present invention, it is possible to reduce the flow of slag into the ladle; P) 11 effects such as prevention of damage and extension of ladle life were observed.
尚、本発明は、連続鋳造１〕場における取鍋からのスラ
グ流出検知にも適用ＩＩ）能である。The present invention can also be applied to detecting slag flowing out from a ladle in a continuous casting field.
（発明の効果）
以１・、 ＋ｉ工、ｖＪ： したように本発明は、従来
用いられていた波長０．７５〜２．００μｍよりも長波
長の２．１〜２．３／１ｍのエネルギーを透過する光学
的フィルタを用いることにより、スラグと溶鋼とのｉ１
１度／ｌ！度の差を従来よりも顕著に区別でき、また該
輝度温度のリアル値と移動・＋１均値との比較により溶
鋼とスラグとの判別を１１い、かつスラグ流出を検知す
るものであるから、（１４造もｉＴｌ中で、これに“Ｕ
する費用も小さなものとなるメリットがある。(Effects of the invention) 1., +I, vJ: As mentioned above, the present invention utilizes energy at a wavelength of 2.1 to 2.3/1 m, which is longer than the conventionally used wavelength of 0.75 to 2.00 μm. By using an optical filter that transmits the i1 of slag and molten steel,
1 degree/l! It is possible to distinguish the difference in temperature more markedly than before, and it is possible to distinguish between molten steel and slag by comparing the real value of the brightness temperature with the moving +1 average value, and to detect the outflow of slag. (14th generation is also in iTl, and this “U
This has the advantage that the cost involved is small.
４、図面（Ｄ ｆｆｉ’ｉ ｒｌｌ−す説明第１図は本
発明方法を説明するための模式図、第２図は第１図にお
ける放射温度計の起電力波形図である。4. Drawings (Description) FIG. 1 is a schematic diagram for explaining the method of the present invention, and FIG. 2 is an electromotive force waveform diagram of the radiation thermometer in FIG. 1.
（＋）・・・転炉、（３）・・・溶鋼、（４）・・・取
鍋、（５）・・・スラグ、（６）・・・光学的フィルタ
、（７）・・・放射温度１：１゜
第１図
第２（４(+)... Converter, (3)... Molten steel, (4)... Ladle, (5)... Slag, (6)... Optical filter, (7)... Radiation temperature 1:1゜Figure 1 2 (4
Claims (1)
、波長２．１〜２．３μｍのエネルギーが透過する光学
的フィルタを介し放射温度計によって連続的に測定し、
輝度のリアル値と移動平均値との比較により、溶鋼とス
ラグとを判別し、スラグ流出を検知する転炉スラグ流出
検知方法。During the tapping process in a converter, the radiant energy of the tapping stream is continuously measured by a radiation thermometer through an optical filter that transmits energy with a wavelength of 2.1 to 2.3 μm.
A converter slag outflow detection method that distinguishes between molten steel and slag by comparing the real value of brightness and the moving average value, and detects slag outflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1427886A JPS62174314A (en) | 1986-01-24 | 1986-01-24 | Detection of slag outflow from converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1427886A JPS62174314A (en) | 1986-01-24 | 1986-01-24 | Detection of slag outflow from converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62174314A true JPS62174314A (en) | 1987-07-31 |
Family
ID=11856623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1427886A Pending JPS62174314A (en) | 1986-01-24 | 1986-01-24 | Detection of slag outflow from converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62174314A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990010720A1 (en) * | 1989-03-10 | 1990-09-20 | The Broken Hill Proprietary Company Limited | Detection of the molten steel-slag interface by spectrophotometry during tapping of the basic oxygen converter |
| JP2009287097A (en) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | Method for detecting flowing-out of slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4314967Y1 (en) * | 1965-02-18 | 1968-06-24 | ||
| JPS5272309A (en) * | 1975-12-12 | 1977-06-16 | Nippon Steel Corp | Discriminating between molten metal and slag |
| JPS53138907A (en) * | 1977-05-11 | 1978-12-04 | Nippon Kokan Kk <Nkk> | Separating method for molten slag and molten steel at tap hole of converter |
| JPS5537828B1 (en) * | 1970-06-18 | 1980-09-30 |
-
1986
- 1986-01-24 JP JP1427886A patent/JPS62174314A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4314967Y1 (en) * | 1965-02-18 | 1968-06-24 | ||
| JPS5537828B1 (en) * | 1970-06-18 | 1980-09-30 | ||
| JPS5272309A (en) * | 1975-12-12 | 1977-06-16 | Nippon Steel Corp | Discriminating between molten metal and slag |
| JPS53138907A (en) * | 1977-05-11 | 1978-12-04 | Nippon Kokan Kk <Nkk> | Separating method for molten slag and molten steel at tap hole of converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990010720A1 (en) * | 1989-03-10 | 1990-09-20 | The Broken Hill Proprietary Company Limited | Detection of the molten steel-slag interface by spectrophotometry during tapping of the basic oxygen converter |
| JP2009287097A (en) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | Method for detecting flowing-out of slag |
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