JPH0783576A - Oxygen lance pipe apparatus for electric furnace - Google Patents
Oxygen lance pipe apparatus for electric furnaceInfo
- Publication number
- JPH0783576A JPH0783576A JP24972493A JP24972493A JPH0783576A JP H0783576 A JPH0783576 A JP H0783576A JP 24972493 A JP24972493 A JP 24972493A JP 24972493 A JP24972493 A JP 24972493A JP H0783576 A JPH0783576 A JP H0783576A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- electric furnace
- lance
- scrap
- lance pipe
- 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
-
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スクラップ等の金属材
料の溶解、溶融金属の精錬等に使用される電気炉の酸素
または酸素含有ガスの吹込み装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxygen or oxygen-containing gas blowing device for an electric furnace used for melting metal materials such as scrap and refining molten metal.
【０００２】[0002]
【従来の技術】金属材料の溶解、溶融金属の精錬等に使
用される電気炉として、炉内に装入した金属材料の上方
に配設した電極と、炉底、側壁等の炉壁に取り付けた電
極との間に電流を流し、金属材料の溶解、溶融金属の精
錬を行う直流電気炉、また、炉内に装入した金属材料の
上方に配設した３本の電極間に電流を流し金属材料の溶
解、溶融金属の精錬を行う交流電気炉が知られている。
この種の電気炉は金属材料の溶解促進、溶融金属の精錬
を行うために、酸素を消耗式のパイプを使用し、炉内の
溶融金属内に吹き込む操業が一般的に行われている。2. Description of the Related Art As an electric furnace used for melting metal materials, refining molten metal, etc., it is attached to electrodes placed above the metal materials charged in the furnace and furnace walls such as the bottom and side walls of the furnace. A DC electric furnace that melts metal materials and smelts molten metal by passing an electric current between the electrodes and the three electrodes that are placed above the metallic materials charged in the furnace. An alternating current electric furnace for melting a metal material and refining a molten metal is known.
In this type of electric furnace, in order to promote the melting of metal materials and the refining of molten metal, it is common practice to blow oxygen into the molten metal in the furnace using a consumable pipe.
【０００３】従来、この酸素の吹き込みは消耗式のパイ
プを作業者が保持し炉内に吹き込む作業で行っていた
が、近年は消耗式のパイプによる吹き込み方法から、た
とえば、特開平１−２１９１１６号公報に示されている
転炉の上吹きランスを電気炉に適用した非消耗式の水冷
ランス方式が、作業者の電気炉前でのパイプの消耗によ
る新しいパイプの接続作業を不要とするので、作業者を
重筋、高温環境下の作業から開放する方式として採用さ
れている。Conventionally, the blowing of oxygen has been carried out by a worker holding a consumable pipe and blowing it into the furnace, but in recent years, a blowing method using a consumable pipe has been used, for example, Japanese Patent Laid-Open No. 1-219116. Since the non-consumable water-cooled lance method in which the upper blowing lance of the converter shown in the official gazette is applied to the electric furnace eliminates the need for workers to connect a new pipe due to exhaustion of the pipe in front of the electric furnace, It is adopted as a method to relieve workers from work in heavy muscles and high temperature environments.
【０００４】[0004]
【発明が解決しようとする課題】図３は、現在使用され
ている電気炉の炉前に設置された非消耗式酸素吹き込み
装置の概略及びこの装置における酸素噴流到達範囲を表
す平面図を示す。水冷式ランス本体３はアーム４の先端
部に設けられている。このアームは旋回機構５により旋
回し、該ランスをその先端が電気炉作業口２に来るよう
に移動することができる。FIG. 3 is a schematic view of a non-consumable oxygen blowing apparatus installed in front of a furnace of an electric furnace currently used and a plan view showing an oxygen jet reaching range in this apparatus. The water-cooled lance body 3 is provided at the tip of the arm 4. This arm can be swung by the swivel mechanism 5 and the lance can be moved so that its tip comes to the electric furnace working port 2.
【０００５】また、アーム横に設けられた首振り機構に
よって、ランス先端を作業口左側から右端まで振らせる
ことができる。そのときのランスの位置関係はそれぞれ
３−２、３−３で示すようになる。この結果、ランス先
端のノズルから噴出される酸素噴流の中心流の到達範囲
７は、角度θ1 に限定された範囲となり、作業口２の両
側に酸素噴流の中心流の未到達範囲８が生じる。この領
域にスクラップの溶け残りが起こりやすいという欠点を
有している。この溶け残りスクラップが溶鋼中に倒れ込
むと、このスクラップ中の炭素と溶鋼中の酸素が急激に
反応し、いわゆる、突沸が発生し、大量の溶滴が飛散し
て、非常に危険である。Further, the swing mechanism provided on the side of the arm can swing the tip of the lance from the left side to the right side of the working opening. The positional relationships of the lances at that time are as shown in 3-2 and 3-3, respectively. As a result, the reach range 7 of the central flow of the oxygen jet ejected from the nozzle at the tip of the lance becomes a range limited to the angle θ 1 , and the unreached range 8 of the center flow of the oxygen jet occurs on both sides of the working port 2. . It has a drawback that scrap unmelted residue easily occurs in this region. When the unmelted scrap falls into the molten steel, carbon in the scrap and oxygen in the molten steel suddenly react with each other, so-called bumping occurs, and a large amount of droplets scatter, which is very dangerous.
【０００６】また、出鋼間際に溶け残りスクラップが溶
鋼中に倒れ込んだ場合、溶鋼成分の変化、特に炭素成分
値の上昇や溶鋼温度の低下が生じ、再度成分調整や昇熱
が必要となり、その結果、処理時間の延長や電力原単位
の悪化が生じ、生産に重大な支障を及ぼす。本発明の目
的は、係る非消耗式の酸素吹き込み装置において、作業
口の両側のスクラップの溶け残りを解消する酸素吹き込
み装置を提供することにある。Further, when the unmelted scrap falls into the molten steel immediately before tapping, the molten steel composition changes, especially the carbon component value rises and the molten steel temperature falls, and it is necessary to adjust the components and raise the temperature again. As a result, the processing time is extended and the power consumption rate deteriorates, which seriously hinders production. An object of the present invention is to provide, in such a non-consumable oxygen blowing device, an oxygen blowing device that eliminates unmelted residue of scrap on both sides of a work port.
【０００７】[0007]
【課題を解決するための手段】本発明は、スクラップ等
の固体金属をカッティングし、溶解し、また溶融金属を
精錬する電気炉内上部から酸素または酸素含有ガスを吹
き込む酸素吹き込み装置において、首振り機構を備える
とともに回転自在な酸素供給ランスを備えることによっ
て上記課題を解決した。DISCLOSURE OF THE INVENTION The present invention relates to an oxygen blowing apparatus for cutting solid metal such as scrap, melting it, and refining molten metal by blowing oxygen or an oxygen-containing gas from the upper part of an electric furnace. The above problem is solved by providing a mechanism and a rotatable oxygen supply lance.
【０００８】[0008]
【作用】本発明は水冷式ランス本体に首振り機構を設
け、左右に首振りするとともに、ランスの通り芯を中心
に回転させる機構を設け、水冷ランス本体を左右方向に
回転自在にすることによって、ランス先端のノズルから
噴出する酸素噴流を電気炉作業口の左右外側に向けるこ
とが可能となる。この方法によって、酸素噴流の中心流
が到達する範囲を作業口両側で拡大することができ、酸
素噴流の未到達範囲を減少することが可能となってスク
ラップの溶け残りが解消される。According to the present invention, the water-cooling lance body is provided with a swinging mechanism for swinging left and right, and a mechanism for rotating the lance around the center of the lance so that the water-cooling lance body is rotatable in the left-right direction. It is possible to direct the oxygen jets ejected from the nozzle at the tip of the lance to the left and right outside of the electric furnace working port. By this method, the range reached by the central flow of the oxygen jet can be expanded on both sides of the work opening, and the unreached range of the oxygen jet can be reduced, and the unmelted residue of scrap is eliminated.
【０００９】[0009]
【実施例】以下、本発明の実施例を添付の図面をもとに
詳しく説明する。図１（Ａ）は本発明に係る酸素吹き込
み装置の実施例の要部側面図である。図１（Ｂ）は図１
（Ａ）の拡大正面図、図１（Ｃ）は図１（Ａ）の部分拡
大断面図である。３は水冷ランス本体で、該ランス先端
部には、酸素吹きだし用のノズル９が、溶鋼面に向かう
ように、水冷ランス本体３の中心軸に対し角度θ2 をな
して設けられている。Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1A is a side view of a main part of an embodiment of an oxygen blowing device according to the present invention. FIG. 1 (B) is shown in FIG.
1A is an enlarged front view, and FIG. 1C is a partially enlarged cross-sectional view of FIG. Reference numeral 3 denotes a water-cooling lance main body, and an oxygen blowing nozzle 9 is provided at the tip of the lance at an angle θ 2 with respect to the central axis of the water-cooling lance main body 3 so as to face the molten steel surface.
【００１０】水冷ランス本体３を自在に回転させるため
の回転機構の一例として、図１（Ａ）ではランス本体３
にスプロケット１０を設け、該スプロケット１０と隣接
して配置した電動機１１に取り付けられた別のスプロケ
ット１２とをリンクチェーン１３を介して連結すること
によって水冷ランス本体３を回転する方法を示してい
る。１４は酸素、冷却水等のユーティリティ配管が冷却
水ランスの回転に追従する為のロータリージョイントで
ある。このように冷却ランスを左右に回転することによ
り、該水冷ランス先端のノズル９は、図１（Ｂ）に示す
ように９−２から９−３まで角度θ3 回転させることが
可能となる。As an example of a rotating mechanism for freely rotating the water cooling lance body 3, the lance body 3 is shown in FIG. 1 (A).
The method of rotating the water-cooling lance main body 3 is shown by providing a sprocket 10 on the sprocket 10 and connecting the sprocket 10 and another sprocket 12 attached to an electric motor 11 disposed adjacent to the sprocket 10 via a link chain 13. Reference numeral 14 is a rotary joint for utility pipes such as oxygen and cooling water to follow the rotation of the cooling water lance. By rotating the cooling lance to the left and right in this manner, the nozzle 9 at the tip of the water cooling lance can be rotated by an angle θ 3 from 9-2 to 9-3 as shown in FIG. 1 (B).
【００１１】図２は前記水冷ランス３にこの回転機構を
設けた場合の概略平面図及び酸素噴流の中心流の到達範
囲７を表す平面図を示している。水冷式ランス本体３は
アーム４の先端部に設けられている。このアーム４は旋
回機構５により旋回し、該ランスをその先端が電気炉作
業口２に来るまで移動することができる。FIG. 2 shows a schematic plan view in the case where this water cooling lance 3 is provided with this rotating mechanism and a plan view showing an arrival range 7 of the central flow of the oxygen jet flow. The water-cooled lance body 3 is provided at the tip of the arm 4. The arm 4 is swung by the swivel mechanism 5, and the lance can be moved until its tip comes to the electric furnace working port 2.
【００１２】また、アーム横に設けられた首振り機構６
によって、ランス先端を作業口左側から右側まで角度θ
1 の範囲で振らせることができる。そのときのランスの
位置関係はそれぞれ３−２、３−３で示すようになる。
ランス先端に設けられたノズルの向きは噴流が浴面に向
かうように角度θ2 （図１（Ｃ）参照）だけ下に向けら
れている。A swinging mechanism 6 provided beside the arm
The angle of the lance tip from the left side to the right side of the work opening.
It can be shaken in the range of 1 . The positional relationships of the lances at that time are as shown in 3-2 and 3-3, respectively.
The nozzle provided at the tip of the lance is oriented downward by an angle θ 2 (see FIG. 1C) so that the jet flow is directed toward the bath surface.
【００１３】更に回転機構を用いて水冷ランスを角度θ
3 （図１（Ｂ）参照）回転させることによりノズルの向
きが炉中心より外側を向き、酸素噴流の到達範囲は回転
機構を設けない時の到達範囲に比べ、両側にそれぞれθ
4 ／２だけ拡大することが可能となり、炉体１の作業口
２の両側に酸素噴流の中心流の未到達範囲８が減少す
る。Further, a water cooling lance is set to an angle θ by using a rotating mechanism.
3 (Refer to Fig. 1 (B)) By rotating, the nozzle faces outward from the center of the furnace, and the reach of the oxygen jet is θ on both sides compared to the reach without the rotation mechanism.
4/2 it is possible to only expand, unreached range 8 of the central flow of oxygen jet is reduced on both sides of the working port 2 of the furnace body 1.
【００１４】尚、θ4 は水冷ランス本体３の回転角θ3
及び該ランス先端の酸素吹きだしノズルのランス中心軸
に対する吹き出し角度θ2 により次式で求められる。 θ4 ＝２ｔａｎ-1（ｔａｎθ2 ・ｔａｎ（θ3 ／２）） 我々の実施した一例では、噴流の吹き出し角度θ2 ＝２
６．５°、回転角度θ3 ＝６０°で、酸素噴流の中心流
の到達範囲をθ4 ＝３２°拡大させることができた。Note that θ 4 is the rotation angle θ 3 of the water cooling lance body 3.
And the blowout angle θ 2 of the oxygen blowing nozzle at the tip of the lance with respect to the central axis of the lance, it is obtained by the following equation. θ 4 = 2tan -1 (tanθ 2 · tan (θ 3/2)) In our implementation the example, blowout angle of the jet theta 2 = 2
At 6.5 ° and a rotation angle θ 3 = 60 °, the reach range of the central flow of the oxygen jet could be expanded by θ 4 = 32 °.
【００１５】[0015]
【発明の効果】以上説明したように本発明の電気炉の消
耗式酸素吹き込み装置は、作業口両側の通常の首振りだ
けでは死角となる部分にも酸素噴流を到達させることを
可能とするので、スクラップの溶け残りを減少させるこ
とが可能であり、スクラップの溶け残りの発生がなくな
ることによって、スクラップの倒れ込みによる突沸の危
険防止及び成分の再調整、昇熱による処理時間の延長や
電力原単位の悪化の防止が図れることになる。これによ
り、操業の安定性の向上及び生産性の向上に大いに寄与
するものである。As described above, the consumable oxygen blowing apparatus for an electric furnace according to the present invention enables the oxygen jet to reach the blind spots on the both sides of the working port only by the normal swinging. It is possible to reduce the unmelted residue of scrap, and by eliminating the unmelted residue of scrap, prevent the risk of bumping due to the collapse of scrap, re-adjust the components, extend the processing time by raising the temperature, and reduce the electricity consumption rate. It is possible to prevent the deterioration of This greatly contributes to the improvement of operational stability and productivity.
【図１】本発明の水冷ランスをの一例を示し、（Ａ）は
酸素吹き込み装置の実施例の要部側面図、（Ｂ）は
（Ａ）の正面図、（Ｃ）は（Ａ）の部分拡大図である。1 shows an example of a water cooling lance of the present invention, (A) is a side view of a main part of an embodiment of an oxygen blowing device, (B) is a front view of (A), and (C) is of (A). FIG.
【図２】本発明の回転機構を設けた場合の概略装置と酸
素噴流の到達範囲の平面図である。FIG. 2 is a plan view of a schematic device and an oxygen jet reaching range when the rotating mechanism of the present invention is provided.
【図３】従来の水冷酸素ランスの首振り機構における概
略装置と酸素噴流の到達範囲を表す平面図である。FIG. 3 is a plan view showing a schematic device in a swing mechanism of a conventional water-cooled oxygen lance and a reach range of an oxygen jet.
１ 電気炉炉体 ２ 電気炉作業口 ３ 水冷ランス本体 ４ アーム ５ 旋回機構 ６ 首振り機構 ７ 酸素噴流の中心流の到達範囲 ８ 酸素噴流の中心流の未到達範囲 ９ ノズル １０ スプロケット １１ 電動機 １２ スプロケット １３ リンクチェーン １４ ロータリージョイント 1 Electric Furnace Body 2 Electric Furnace Work Port 3 Water Cooling Lance Main Body 4 Arm 5 Swing Mechanism 6 Swing Mechanism 7 Reaching Range of Central Flow of Oxygen Jet 8 Unreachable Range of Central Flow of Oxygen Jet 9 Nozzle 10 Sprocket 11 Electric Motor 12 Sprocket 13 Link chain 14 Rotary joint
Claims (1)
し、溶解し、また溶融金属を精錬する電気炉内上部から
酸素または酸素含有ガスを吹き込む酸素吹き込み装置に
おいて、首振り機構を備えると共に回転自在な酸素供給
ランスを備えたことを特徴とする電気炉の酸素吹込み装
置。1. An oxygen blowing device for cutting solid metal such as scrap, melting it, and refining the molten metal by blowing oxygen or an oxygen-containing gas from the upper part of an electric furnace. An oxygen blowing device for an electric furnace, which is equipped with a supply lance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24972493A JP3174931B2 (en) | 1993-09-13 | 1993-09-13 | Electric furnace oxygen injection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24972493A JP3174931B2 (en) | 1993-09-13 | 1993-09-13 | Electric furnace oxygen injection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0783576A true JPH0783576A (en) | 1995-03-28 |
| JP3174931B2 JP3174931B2 (en) | 2001-06-11 |
Family
ID=17197260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24972493A Expired - Lifetime JP3174931B2 (en) | 1993-09-13 | 1993-09-13 | Electric furnace oxygen injection equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3174931B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091612A (en) * | 2007-10-05 | 2009-04-30 | Sumitomo Metal Ind Ltd | Method and apparatus for raising temperature of molten steel containing aluminum |
| CN103868363A (en) * | 2014-03-14 | 2014-06-18 | 张丽 | Efficient energy-saving oxygen blowing device for mining and metallurgy furnace |
| CN105112684A (en) * | 2015-10-05 | 2015-12-02 | 杨伟燕 | Suspension smelting nozzle |
| US10126060B2 (en) | 2015-05-01 | 2018-11-13 | Opta Minerals Inc. | Lance drive system |
| CN109055659A (en) * | 2018-10-31 | 2018-12-21 | 唐山英特拉克冶金科技有限公司 | Mobile arc furnace wall lance |
-
1993
- 1993-09-13 JP JP24972493A patent/JP3174931B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091612A (en) * | 2007-10-05 | 2009-04-30 | Sumitomo Metal Ind Ltd | Method and apparatus for raising temperature of molten steel containing aluminum |
| CN103868363A (en) * | 2014-03-14 | 2014-06-18 | 张丽 | Efficient energy-saving oxygen blowing device for mining and metallurgy furnace |
| CN103868363B (en) * | 2014-03-14 | 2015-11-18 | 张丽 | The energy-efficient oxygen blowing device of a kind of mining and metallurgy stove |
| US10126060B2 (en) | 2015-05-01 | 2018-11-13 | Opta Minerals Inc. | Lance drive system |
| CN105112684A (en) * | 2015-10-05 | 2015-12-02 | 杨伟燕 | Suspension smelting nozzle |
| CN109055659A (en) * | 2018-10-31 | 2018-12-21 | 唐山英特拉克冶金科技有限公司 | Mobile arc furnace wall lance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3174931B2 (en) | 2001-06-11 |
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