JPH07173522A - Treatment of molten metal - Google Patents
Treatment of molten metalInfo
- Publication number
- JPH07173522A JPH07173522A JP32049393A JP32049393A JPH07173522A JP H07173522 A JPH07173522 A JP H07173522A JP 32049393 A JP32049393 A JP 32049393A JP 32049393 A JP32049393 A JP 32049393A JP H07173522 A JPH07173522 A JP H07173522A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- area
- reaction chamber
- image
- gas
- 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- Withdrawn
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、溶融金属の処理方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating molten metal.
【０００２】[0002]
【従来の技術】従来、真空脱ガス炉内の溶鋼の飛散また
はスプラッシュに対しては、特開平４−１３８０７、特
開平２−８３１６、特開平２−１４５７１７号公報に示
してあるように電磁力、脱ガス槽の飛散防止板、浸漬管
からのガス吹込み方法の改善により脱ガス槽内への付着
防止を図り、脱炭等の反応効率の低下防止、真空排気系
へのダスト削減を行ってきた。一方、取鍋の溶融金属表
面における溶融金属の飛散については、これまでオペレ
ーターの目視監視により検知し、溶融金属の飛散状況に
合わせた処置をオペレーターが行ってきた。2. Description of the Related Art Conventionally, with respect to splashing or splashing of molten steel in a vacuum degassing furnace, an electromagnetic force is applied as disclosed in JP-A-4-13807, JP-A-2-8316 and JP-A-2-145717. Improve the degassing tank scattering prevention plate and the gas injection method from the dip tube to prevent adhesion to the degassing tank, prevent deterioration of reaction efficiency such as decarburization, and reduce dust in the vacuum exhaust system. Came. On the other hand, the dispersion of molten metal on the surface of the molten metal in the ladle has been detected by visual inspection by the operator, and the operator has taken appropriate measures according to the scattered state of the molten metal.
【０００３】[0003]
【発明が解決しようとする課題】これまで目視監視によ
り溶融金属の飛散の検知方法では、取鍋の溶融金属の全
表面を映す多数モニターを複数のオペレーターが常に監
視する必要があり、オペレーターへの負荷が大きい。In the conventional methods for detecting the scattering of molten metal by visual monitoring, it is necessary for a plurality of operators to constantly monitor a large number of monitors showing the entire surface of the molten metal in the ladle. The load is heavy.
【０００４】そこで、本発明においては、取鍋の溶融金
属の表面を映した画像を明度の違いにより画像解析する
ことによりスプラッシュの自動検知を行い、監視モニタ
ーの統合化、オペレーターによる監視業務の軽減を図
る。又、スプラッシュにより人的、設備的な被害が予想
される場合は、自動的に危険回避措置を行わしめる溶融
金属の処理方法を提供するものである。Therefore, in the present invention, the splash reflected is automatically detected by analyzing the image showing the surface of the molten metal of the ladle according to the difference in brightness, the monitoring monitor is integrated, and the monitoring work by the operator is reduced. Plan. Further, the present invention provides a method for treating molten metal, which automatically takes a risk avoidance measure when human or facility damage is expected due to splash.
【０００５】[0005]
【課題を解決するための手段】本発明は上記課題を解決
するためになされたものであり、溶融金属処理反応槽の
下部を融金属中に浸漬させ、ガスを吹込み及びまたは合
金を添加する処理を行うに際して、該反応槽の浸漬部以
外の溶融金属表面を監視カメラにより撮影しその画像を
明度により２値化し、設定したスラグ表面明るさ以上の
部分の画像面積を計算し、その面積の絶対値が設定した
値以上になるか、または面積の時間変化が設定値以上に
なった時、異常表示または吹込みガスの停止又は反応槽
の浸漬深さを増加させることを特徴とする溶融金属の処
理方法を要旨とする。The present invention has been made to solve the above-mentioned problems, and the lower part of a reaction vessel for treating molten metal is immersed in molten metal, gas is blown and / or alloy is added. When performing the treatment, the surface of the molten metal other than the immersion portion of the reaction tank is photographed by a surveillance camera, the image is binarized according to the brightness, and the image area of a portion having a brightness higher than the set slag surface brightness is calculated. Molten metal characterized by displaying an error, stopping the blowing gas or increasing the immersion depth of the reaction tank when the absolute value exceeds the set value or the time change of the area exceeds the set value The processing method of is summarized.
【０００６】[0006]
【作用及び実施例】本発明を実施するための装置構成例
は図１に示した様に監視カメラ８、画像解析装置１０と
この画像解析装置１０からの解析信号を受けて図２に示
す制御フローを行う制御部１１により構成される。OPERATION AND EXAMPLES As an example of the apparatus configuration for carrying out the present invention, as shown in FIG. 1, the monitoring camera 8, the image analysis apparatus 10 and the control shown in FIG. It is configured by a control unit 11 that performs a flow.
【０００７】そしてその機能構成は、溶融金属中に浸漬
させた真空脱ガス槽１５（反応槽）の下端周辺部の浮遊
スラグの表面を監視カメラ８により撮影し、図２に示す
信号処理フローの様に、画像解析装置１０において２値
化処理し設定した明度以上の面積Ｓおよび面積の相対時
間変化Ｌを求める。制御部１１は、これらの値を入力し
て合金添加以外の時この面積Ｓがしきい値ＳA1以上また
は面積変化Ｌが、しきい値ＬA1以上になった際、反応槽
の浸漬部以外に浮上するインジェクションランス５のノ
ズル４からの吹込みガス６によるスプラッシュ７として
検知し、オペレーターに対し警告を行う。又、面積Ｓが
ＳA2以上又は面積変化ＬがＬA2以上あり、大きなスプラ
ッシュ７が発生しているものと推定される場合は危険回
避措置として、検出位置へ吹込むガス流量を自動的に停
止または下限値に制御し、スプラッシュによる被害を最
小限に抑える。The functional structure is that the surface of the floating slag around the lower end of the vacuum degassing tank 15 (reaction tank) immersed in the molten metal is photographed by the monitoring camera 8, and the signal processing flow shown in FIG. In this manner, the area S having a brightness equal to or higher than the set brightness and the relative time change L of the area are obtained by the binarization processing in the image analysis device 10. The control unit 11 inputs these values, and when the area S is equal to or more than the threshold value S A1 or the area change L is equal to or more than the threshold value L A1 except for alloy addition, except for the dipping portion of the reaction tank. It is detected as a splash 7 due to the gas 6 blown from the nozzle 4 of the injection lance 5 that floats to the front, and a warning is given to the operator. If the area S is S A2 or more or the area change L is L A2 or more and it is estimated that a large splash 7 is occurring, the gas flow rate blown to the detection position is automatically stopped as a risk avoidance measure. Or control to the lower limit to minimize the damage caused by splash.
【０００８】また溶融金属と反応しＣＯガス、ＣＯ2 ガ
ス、水蒸気等のガスの発生が予想される合金の投入時、
合金添加時期後にこの面積Ｓがしきい値ＳB1以上または
面積変化Ｌが、しきい値ＬB1以上になった際、合金添加
後に合金添加によるスプラッシュとして検知してオペレ
ーターに対し警告を行うとともに、合金投入を一時停止
し、オペレーターの介入処置等を待つ。At the time of charging an alloy, which is expected to generate a gas such as CO gas, CO 2 gas or steam by reacting with molten metal,
When the area S becomes equal to or more than the threshold value S B1 or the area change L becomes equal to or more than the threshold value L B1 after the alloy addition time, the operator is warned by detecting as a splash due to the alloy addition after the alloy addition, Temporarily suspend alloy injection and wait for operator intervention.
【０００９】制御部１１での合金添加の有無の識別は、
合金添加装置（図示せず）の動作状況情報を入力して行
わしめる。Whether the alloy is added or not in the control unit 11 is identified by
The operation status information of the alloy addition device (not shown) is input and performed.
【００１０】［適応例１］浸漬管３直下のランス５先端
のノズル４からＡｒガス６を２５００Nl/minで吹込み行
ったＡｌ−Ｋ鋼のＲＨ処理において、処理中Ａｒガス流
量を３５００Nl/min、５０００Nl/minに増量しＡｒガス
の浮上面積を大きくすることで浸漬管３の外周部での
小、大のスプラッシュ７を故意に発生させた。その際の
浸漬管３外周部の明度の変化を監視カメラ８にて撮影
し、画像解析を行った。図３はスプラッシュ発生させた
時の浸漬管３外周部の明度の時間変化を示したものであ
る。図３に示した様にスプラッシュ発生に伴い明確な明
度の面積および面積の時間変化に差異が見られ、ＳA1＝
１５％、ＬA1＝２０arb.unitにより、スプラッシュ７の
検知ができた。また、ＳA2＝３５％、ＬA2＝３０arb.un
itにより大きいスプラッシュ７を検知でき自動的にラン
スガス流量を下限値に制御し、スプラッシュを抑制する
ことができた。[Application Example 1] In the RH treatment of Al-K steel in which Ar gas 6 was blown at 2500 Nl / min from the nozzle 4 at the tip of the lance 5 just below the immersion pipe 3, the Ar gas flow rate during treatment was 3500 Nl / min. By increasing the amount to 5000 Nl / min and increasing the floating area of Ar gas, small and large splashes 7 on the outer peripheral portion of the dipping tube 3 were intentionally generated. At that time, the change in brightness of the outer peripheral portion of the dipping tube 3 was photographed by the monitoring camera 8 and image analysis was performed. FIG. 3 shows the change over time in the brightness of the outer peripheral portion of the dip tube 3 when a splash is generated. As shown in FIG. 3, there is a clear difference in the area of lightness and the time change of the area due to the occurrence of splash, and S A1 =
Splash 7 could be detected by 15% and L A1 = 20 arb.unit. Also, S A2 = 35%, L A2 = 30 arb.un
A larger splash 7 was detected in it, and the lance gas flow rate was automatically controlled to the lower limit value, and the splash was suppressed.
【００１１】［適応例２］浸漬管３直下のランス５先端
のノズル４からＡｒガス６を２５００Nl/minで吹込み行
ったＡｌ−Ｋ鋼のＲＨ処理において、処理開始後、酸素
濃度３５０ppm にてコークスの投入量を１００Kgに設定
し、コークス多量投入によるＣＯガスの多量発生を浸漬
管３外周部にて起こし、スプラッシュ７を故意に発生さ
せた。その際の浸漬管外周部の明度の変化を監視カメラ
８にて撮影し画像解析を行った。図４はコークス投入時
の浸漬管外周部の明度の時間変化を示したものである。
図４に示した様にコークス投入に伴い明確な明度の面積
および面積の時間変化に差異が見られ、ＳB1＝１５％、
ＬB1＝２０arb.unitにより、スプラッシュの検知がで
き、オペレーターへの警告および合金投入の一時停止を
自動的に行った。その結果、コークスは添加量６０Kgで
一時停止でき、スプラッシュの鎮静化を行うことができ
た。[Application Example 2] In the RH treatment of Al-K steel in which Ar gas 6 was blown at 2500 Nl / min from the nozzle 4 at the tip of the lance 5 just below the immersion pipe 3, the oxygen concentration was 350 ppm after the treatment was started. The amount of coke charged was set to 100 kg, and a large amount of CO gas was generated at the outer peripheral portion of the dip tube 3 by the large amount of coke charged to intentionally generate a splash 7. At this time, the change in brightness of the outer peripheral portion of the dipping tube was photographed by the monitoring camera 8 and image analysis was performed. FIG. 4 shows the change over time in the lightness of the outer peripheral portion of the immersion pipe when coke was charged.
As shown in FIG. 4, there was a clear difference in the area of lightness and the time variation of the area with the addition of coke, and S B1 = 15%,
Splash can be detected by L B1 = 20 arb.unit, and warning to the operator and suspension of alloy injection are automatically performed. As a result, the coke could be temporarily stopped at the addition amount of 60 kg, and the splash could be soothed.
【００１２】[0012]
【発明の効果】本発明は、溶融金属中への吹込みガス、
投入合金の反応により生成したガスによるスプラッシュ
を監視カメラの画像の明度による画像解析によりスプラ
ッシュを自動検知し、オペレーターへの警告を行うとと
もに、スプラッシュの大きさにより吹込みガスの停止又
はガスを生成する合金の一時停止等の危険回避措置を自
動的に行い、取鍋および反応槽周囲の作業者および設備
の安全保護を迅速に行い、且つオペレーターの操業監視
業務の作業負荷軽減を図るものである。INDUSTRIAL APPLICABILITY The present invention relates to a gas blown into a molten metal,
Splash due to gas generated by reaction of input alloy is monitored.Splash is automatically detected by image analysis based on the brightness of the image of the camera, alerts the operator and stops the blown gas or generates gas depending on the size of the splash. It is intended to automatically perform danger avoidance measures such as temporary suspension of alloys, promptly perform safety protection for workers and equipment around the ladle and the reaction tank, and reduce the work load of the operator's operation monitoring work.
【図１】本発明方法を実施するための装置構成を示す説
明図である。FIG. 1 is an explanatory diagram showing a device configuration for carrying out a method of the present invention.
【図２】図１に示す装置における制御フローを示す説明
図である。FIG. 2 is an explanatory diagram showing a control flow in the apparatus shown in FIG.
【図３】本発明方法の適用例１における経時的明部面積
とその面積変化率の推移を示すグラフである。FIG. 3 is a graph showing changes in the bright area over time and the area change rate thereof in Application Example 1 of the method of the present invention.
【図４】本発明の適用例２における経時的明部面積とそ
の面積変化率の推移を示すグラフである。FIG. 4 is a graph showing changes in the area of a bright portion and its rate of change in area over time in an application example 2 of the present invention.
１ 溶鋼鍋 ２ 溶鋼 ３ 浸漬管 ４ インジェクションノズル ５ インジェクションランス ６ 還流ガス ７ スプラッシュ ８ 監視カメラ ９ モニター １０ 画像解析装置 １１ 制御部 １５ 真空脱ガス槽 1 Molten Steel Pan 2 Molten Steel 3 Immersion Tube 4 Injection Nozzle 5 Injection Lance 6 Reflux Gas 7 Splash 8 Surveillance Camera 9 Monitor 10 Image Analysis Device 11 Controller 15 Vacuum Degassing Tank
Claims (1)
浸漬させ、ガスを吹込み及びまたは合金を添加する処理
を行うに際して、該反応槽の浸漬部以外の溶融金属表面
を監視カメラにより撮影しその画像を明度により２値化
し、設定したスラグ表面明るさ以上の部分の画像面積を
計算し、その面積の絶対値が設定した値以上になるか、
または面積の時間変化が設定値以上になった時、異常表
示または吹込みガスの停止又は反応槽の浸漬深さを増加
させることを特徴とする溶融金属の処理方法。1. When a lower part of a molten metal treatment reaction tank is immersed in molten metal to perform a gas blowing and / or alloy addition treatment, the surface of the molten metal other than the immersion portion of the reaction tank is monitored by a monitoring camera. Taken and binarize the image according to the brightness, calculate the image area of the part above the set slag surface brightness, and see if the absolute value of the area is more than the set value,
Alternatively, a method for treating molten metal, which comprises displaying an abnormality, stopping the blown gas, or increasing the immersion depth of the reaction tank when the time-dependent change in area exceeds a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32049393A JPH07173522A (en) | 1993-12-20 | 1993-12-20 | Treatment of molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32049393A JPH07173522A (en) | 1993-12-20 | 1993-12-20 | Treatment of molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07173522A true JPH07173522A (en) | 1995-07-11 |
Family
ID=18122070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32049393A Withdrawn JPH07173522A (en) | 1993-12-20 | 1993-12-20 | Treatment of molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07173522A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049514A1 (en) * | 2006-10-27 | 2008-05-02 | Sms Mevac Gmbh | Method and apparatus for monitoring, controlling and/or regulating the splashing behaviour of a metal melt |
| CN103194574A (en) * | 2012-12-17 | 2013-07-10 | 西安电子科技大学 | Dynamic regulation method of VOD refined end point carbon content prediction model |
| CN107908170A (en) * | 2017-10-24 | 2018-04-13 | 首钢京唐钢铁联合有限责任公司 | The control method and system of converter grate failure |
| CN114540581A (en) * | 2022-02-28 | 2022-05-27 | 广东韶钢松山股份有限公司 | Regulation and control method for RH vacuum treatment |
-
1993
- 1993-12-20 JP JP32049393A patent/JPH07173522A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049514A1 (en) * | 2006-10-27 | 2008-05-02 | Sms Mevac Gmbh | Method and apparatus for monitoring, controlling and/or regulating the splashing behaviour of a metal melt |
| CN103194574A (en) * | 2012-12-17 | 2013-07-10 | 西安电子科技大学 | Dynamic regulation method of VOD refined end point carbon content prediction model |
| CN107908170A (en) * | 2017-10-24 | 2018-04-13 | 首钢京唐钢铁联合有限责任公司 | The control method and system of converter grate failure |
| CN107908170B (en) * | 2017-10-24 | 2020-11-06 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling converter rocking fault |
| CN114540581A (en) * | 2022-02-28 | 2022-05-27 | 广东韶钢松山股份有限公司 | Regulation and control method for RH vacuum treatment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |