JPH01130493A - Wall electrode of metallurgical electric furnace - Google Patents
Wall electrode of metallurgical electric furnaceInfo
- Publication number
- JPH01130493A JPH01130493A JP63263816A JP26381688A JPH01130493A JP H01130493 A JPH01130493 A JP H01130493A JP 63263816 A JP63263816 A JP 63263816A JP 26381688 A JP26381688 A JP 26381688A JP H01130493 A JPH01130493 A JP H01130493A
- Authority
- JP
- Japan
- Prior art keywords
- plug
- furnace
- metal rod
- rod body
- stud
- 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
- 239000002184 metal Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 238000001816 cooling Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/06—Electrodes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Furnace Details (AREA)
- Discharge Heating (AREA)
- Resistance Heating (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、冶金用電気炉、特に、直流電流を用いる電気
炉の炉壁電極に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a metallurgical electric furnace, and in particular to a furnace wall electrode for an electric furnace using direct current.
従来の技術
本発明が属する上記の冶金用電気炉用炉壁電極は、特に
、炉壁を貫通した中実な金属製棒体を含み、この中実な
金属製棒体の一端は炉内の溶融金属と接触し、その他方
の先端は、冷却用循環流体によって強力に冷却された熱
伝導性材料製のスリーブの内部に収容された部分を介し
て、炉の外に向って突き出ており、炉から突き出た上記
金属製棒体の先端には、給電端子に接続された導電性プ
ラグが設けられており、この導電性プラグは組合せ手段
によって上記金属製棒体の先端と一体化されている。BACKGROUND OF THE INVENTION The above-mentioned furnace wall electrode for a metallurgical electric furnace to which the present invention belongs includes, in particular, a solid metal rod that penetrates the furnace wall, and one end of the solid metal rod extends inside the furnace. the other end in contact with the molten metal projects out of the furnace through a portion housed within a sleeve of thermally conductive material that is strongly cooled by a circulating cooling fluid; A conductive plug connected to a power supply terminal is provided at the tip of the metal rod protruding from the furnace, and the conductive plug is integrated with the tip of the metal rod by a combination means. .
この形式の電極はフランス国特許公開第２．５７２．８
７３号に記載されている。この特許公報に図示された組
合せ手段は、導電性プラグのネジ切りされた凹部中に上
記金属製棒体の下端ネジ部を螺合させる方法によって構
成されている。This type of electrode is described in French Patent Publication No. 2.572.8.
It is described in No. 73. The combination means illustrated in this patent publication is constructed by screwing the lower end threaded portion of the metal rod into the threaded recess of the conductive plug.
発明が解決しようとする課題
上記方法の欠点は加工性に問題があるということの他に
、互いに゛組み合わされた２つの部材の螺合ネジ部が長
い間には分離し、その結果、この分離部分で微小なアー
クが生じ、最後には上記２つの部材が破損されるに至る
という点にある。この欠点は、スリーブにップル）にネ
ジを切って螺合するという別の解決法を採った場合でも
同じである。Problems to be Solved by the Invention The disadvantage of the above method is that in addition to problems with workability, the threaded portions of the two members combined with each other separate over a long period of time, and as a result, this separation occurs. The point is that a minute arc is generated in the part, and the two members mentioned above are eventually damaged. This drawback is the same even with the alternative solution of threading the sleeve into the pull.
これに代わる解決法の研究は容易ではない。すなわち、
互いに組み合わされる上記２つの部材の間の全接触面を
きちんとロウ付けすることは不可能であるため、ロウ付
けを用いることはできない。Researching alternative solutions is not easy. That is,
Brazing cannot be used because it is impossible to properly braze all contact surfaces between the two parts that are assembled together.
本発明の目的は、上記の欠点を解決し、金属製棒体と導
電性プラグとの間に良好な機械的および電気的接触状態
を永久に維持でき、接触面の電気抵抗を最小限にするこ
とが可能な組合せ方法を提示することにある。The purpose of the present invention is to solve the above-mentioned drawbacks, to be able to permanently maintain good mechanical and electrical contact between the metal rod and the conductive plug, and to minimize the electrical resistance of the contact surface. The purpose is to present a combination method that allows for
課題を解決するための手段
上記の目的を達成するための本発明による組合せ手段は
導電性プラグを貫通した植込みボルトによって構成され
、この植込みボルトは金属製棒体の炉から突き出た部分
と螺合し且つその下部表面の所は導電性プラグの外周部
にボルト止めされている。Means for Solving the Problems The combination means according to the invention for achieving the above object consists of a stud that passes through a conductive plug, the stud screwing into the part of the metal rod projecting from the furnace. and its lower surface is bolted to the outer periphery of the conductive plug.
上記組合せ手段は、熱膨張作用でネジ結合が弛まないよ
うに、冷却時に予め応力を加えた状態で締め付けられて
いるのが好ましい。It is preferable that the above-mentioned combination means is tightened in a pre-stressed state during cooling so that the threaded connection does not loosen due to thermal expansion.
本発明は、直流アーク炉の炉床に取り付けた電極の縦断
面を示す添付図面を参照した以下の詳細な説明からより
良く理解できるであろう。BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood from the following detailed description with reference to the accompanying drawings, which show a longitudinal section of an electrode mounted on the hearth of a DC arc furnace.
なお、図示されてはいるが本発明の特徴ではない部分の
詳細な説明は、必要があれば、前述のフランス国特許公
開第２．５７２．、８７３号を参照されたい。If necessary, a detailed explanation of the parts shown in the figures but not characteristic of the present invention can be found in the above-mentioned French Patent Publication No. 2.572. , No. 873.
ここでは、中実な円筒形の金属製の棒体４が炉底１を貫
通し、その上部先端が溶融金属６に接しているというこ
とだけを述べておけば十分であろう。Suffice it to say here that a solid cylindrical metal rod 4 passes through the furnace bottom 1 and its upper tip is in contact with the molten metal 6.
実施例
上記金属製の棒体４は炉のシェルモールドを貫通してお
り、炉から突き出た部分７は、円筒形のスリーブ８に囲
まれており、その下部先端は円筒形のプラグ９に当接し
ている。上記スリーブ８とプラグ９は導電性材料、好ま
しくは、銅でできている。冷却水は側部導管１３を介し
て導入され、スリーブ８の螺旋状溝１１を流れてそれを
冷却した後、側部導管１５を介して排出される。Embodiment The metal rod 4 passes through the shell mold of the furnace, and the part 7 protruding from the furnace is surrounded by a cylindrical sleeve 8, the lower end of which abuts a cylindrical plug 9. are in contact with each other. The sleeve 8 and plug 9 are made of electrically conductive material, preferably copper. The cooling water is introduced via the side conduit 13 and is discharged via the side conduit 15 after flowing through the helical groove 11 of the sleeve 8 and cooling it.
プラグ９は空洞部２５を備え、この空洞部２５の内部に
は冷却システム２６が配置されている。この冷却システ
ム２６は冷却水の導入管３４と排出管３５に連通してい
る。The plug 9 has a cavity 25 in which a cooling system 26 is arranged. This cooling system 26 communicates with a cooling water inlet pipe 34 and an outlet pipe 35 .
図示した実施例では、電気的接続用のプレート３９が、
少なくとも一枚の冷却フィン４１を介して、給電端子に
接続されたケーブル４２に連結されている。スリーブ８
とプラグ９との電気的接続は“板ばね”型接触部材４３
によって１行われている。In the illustrated embodiment, the electrical connection plate 39 is
It is connected via at least one cooling fin 41 to a cable 42 connected to a power supply terminal. sleeve 8
The electrical connection between the plug 9 and the plug 9 is made by a “leaf spring” type contact member 43.
1 is being carried out by
なお、プラグ９と給電端子とを直接電気的に接続するこ
ともできる。Note that the plug 9 and the power supply terminal can also be directly electrically connected.
さらに、支持アーム４９を介してプラグ９の下に端部リ
ング４８を固定し、上記プレート３９の下側に支持する
こともできる。Furthermore, the end ring 48 can also be fixed under the plug 9 via a support arm 49 and supported on the underside of said plate 39.
本発明では、プラグ９と棒体４の外周部に分布された複
数のボルト６０によって、棒体４とプラグ９の対向面が
互いに機械的且つ電気的に接触した状態に維持されてい
る。各植込みボルト６１はプラグ９の孔６２を貫通して
、棒体４の下部先端のネジ孔６３と螺合している。一方
、各植込みボルト６１の他方の端部には座金６４と固定
ナツト６５が取り付けられている。各ボルトは、冷却状
態で予め応力下に締め付られていて、加熱時のボルトの
膨張作用を補償するようになっている。In the present invention, the opposing surfaces of the rod 4 and the plug 9 are maintained in mechanical and electrical contact with each other by a plurality of bolts 60 distributed around the outer peripheries of the plug 9 and the rod 4. Each stud 61 passes through a hole 62 in the plug 9 and is screwed into a threaded hole 63 at the lower end of the rod 4 . On the other hand, a washer 64 and a fixing nut 65 are attached to the other end of each stud 61. Each bolt is prestressed in the cold state to compensate for the expansion effects of the bolt upon heating.
上記の端部リング４８には、上記ボルトを挿入するのに
必要な穴が形成されている。The end ring 48 is provided with holes necessary for inserting the bolts.
図面上では、ボルト６０は１本しか図示していないが、
このボルト６０は、プラグと棒体４の外周に等間隔にボ
ルトを配置するのに必要な数だけ設けることができると
いうことは明らかである。Although only one bolt 60 is shown in the drawing,
It is clear that there can be as many bolts 60 as necessary to arrange the bolts evenly spaced around the circumference of the plug and rod 4.
添付図面は、直流アーク炉の炉床に取り付けた電極の縦
断面である。
（主な参照番号）
１：炉底、 ４：金属製棒体、６：溶融金属
、
７：金属製棒体の炉から突き出た部分、８ニスリーブ、
９ニブラグ、１１：螺旋状溝、 １３
．１５：冷却水導管、２５：空洞部、 ２６：
冷却システム、３４．３５：冷却水の導入管および排出
管、 ′３９：電気的接続用のプレート、
４１：冷却フィン、 ４２：ケーブル、４３：
“板ばね″′型接触部材、The attached drawing is a longitudinal section of an electrode attached to the hearth of a DC arc furnace. (Main reference numbers) 1: Furnace bottom, 4: Metal rod, 6: Molten metal, 7: Part of metal rod protruding from the furnace, 8 Ni sleeve,
9 nib lug, 11: spiral groove, 13
．． 15: Cooling water conduit, 25: Cavity part, 26:
Cooling system, 34. 35: Cooling water inlet and outlet pipes, '39: Plate for electrical connections, 41: Cooling fins, 42: Cables, 43:
“Leaf spring” type contact member,
Claims (2)
属製棒体の一端は炉内の溶融金属と接触し、この金属製
棒体の炉から突き出た部分は熱伝導性材料で作られたス
リーブ（８）によって取り囲まれており、このスリーブ
は循環冷却流体によって強力に冷却されており、金属製
棒体の上記の炉から突き出た部分の延長上には導電性プ
ラグ（９）が配置されており、この導電性プラグは給電
端子に接続されており、上記プラグは組合せ手段によっ
て金属製棒体の上記の炉から突き出た部分と一体化され
ているような冶金用電気炉、特に、直流電気炉用の炉底
電極において、 上記組合せ手段（６０）が上記プラグ（９）を貫通した
植込みボルト（６１）によって構成され、この植込みボ
ルトは上記金属製棒体（８）の上記部分と螺合し且つ上
記プラグ（９）の外周にボルト止めされていることを特
徴とする炉底電極。(1) It has a metal rod (4) that penetrates the furnace wall, one end of this metal rod comes into contact with the molten metal in the furnace, and the part of this metal rod that protrudes from the furnace is a heat conductor. It is surrounded by a sleeve (8) made of a conductive material, which is strongly cooled by a circulating cooling fluid, and in the extension of the part of the metal rod protruding from said furnace there is a conductive plug. (9) is arranged, said electrically conductive plug being connected to a power supply terminal, said plug being integrated with said part of said metal rod protruding from said furnace by means of combination. In a bottom electrode for an electric furnace, in particular a DC electric furnace, the combination means (60) is constituted by a stud (61) passing through the plug (9), which stud (61) is connected to the metal rod (8). ), and is bolted to the outer periphery of the plug (9).
を加えた状態で締め付けられていることを特徴とする請
求項１に記載の炉底電極。2. A hearth electrode according to claim 1, characterized in that said combination means (60) are clamped in a prestressed state in a cooled state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8714466A FR2622078B1 (en) | 1987-10-20 | 1987-10-20 | WALL ELECTRODE FOR ELECTRIC METALLURGICAL OVEN |
| FR8714466 | 1987-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01130493A true JPH01130493A (en) | 1989-05-23 |
| JP2719938B2 JP2719938B2 (en) | 1998-02-25 |
Family
ID=9355980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63263816A Expired - Fee Related JP2719938B2 (en) | 1987-10-20 | 1988-10-19 | Furnace wall electrode of electric furnace for metallurgy |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2719938B2 (en) |
| DE (1) | DE3835785C2 (en) |
| FR (1) | FR2622078B1 (en) |
| IT (1) | IT1225246B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038440A (en) * | 2006-08-04 | 2008-02-21 | Tsuchiya Tsco Co Ltd | Spacer |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2652890B1 (en) * | 1989-10-11 | 1995-01-20 | Siderurgie Fse Inst Rech | ELECTRICAL CONNECTION DEVICE FOR PLACING ON THE WALL OF A METALLURGICAL CONTAINER IN CONTACT WITH A MOLTEN METAL. |
| DE4026897C2 (en) * | 1990-08-23 | 1994-05-05 | Mannesmann Ag | Metallic base electrode for metallurgical vessels |
| DE4138724C2 (en) * | 1991-11-19 | 1997-05-28 | Mannesmann Ag | Method and device for repairing an electrode |
| ATA20694A (en) * | 1994-02-03 | 2000-12-15 | Voest Alpine Ind Anlagen | FLOOR ANODE FOR A METALLURGICAL VESSEL |
| DE19529984C1 (en) * | 1995-08-04 | 1996-10-31 | Mannesmann Ag | Arc oven base electrode |
| DE29602191U1 (en) * | 1996-02-08 | 1996-03-21 | Badische Stahl-Engineering GmbH, 77694 Kehl | Bottom electrode |
| DE19815154C1 (en) * | 1998-03-27 | 1999-08-05 | Mannesmann Ag | Bottom of a metallurgical vessel with a direct current electric arc unit |
| DE102020005129B4 (en) * | 2020-08-21 | 2024-05-16 | Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts | Lower carbon and carbon-free electrodes for use in steel metallurgy |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR518356A (en) * | 1913-12-13 | 1921-05-24 | Fried Krup Ag | Cooling hearth electrodes for electric melting furnaces |
| SE431443B (en) * | 1979-03-23 | 1984-02-06 | Bulten Kanthal Ab | ELECTRODES FOR GLASS HEATING |
| GB2057828B (en) * | 1979-08-29 | 1983-07-20 | Bfg Glassgroup | Furnace electrode assembly |
| FR2566984B1 (en) * | 1984-06-27 | 1986-12-19 | Siderurgie Fse Inst Rech | ELECTRICAL CONNECTION DEVICE FOR PLACING ON THE WALL OF A METALLURGICAL CONTAINER IN CONTACT WITH MOLTEN METAL |
| FR2572873B1 (en) * | 1984-11-06 | 1988-12-02 | Siderurgie Fse Inst Rech | WALL ELECTRODE FOR DIRECT CURRENT ELECTRIC METALLURGICAL OVEN |
| FR2577311B1 (en) * | 1985-02-11 | 1987-03-06 | Siderurgie Fse Inst Rech | ELECTRICAL CONNECTION DEVICE FOR PLACING ON THE WALL OF A DIRECT CURRENT METALLURGICAL OVEN. |
| DE3543278C1 (en) * | 1985-12-05 | 1987-07-02 | Mannesmann Ag | Furnace vessel of a direct current arc furnace with bottom electrodes as well as associated bottom electrode |
-
1987
- 1987-10-20 FR FR8714466A patent/FR2622078B1/en not_active Expired - Fee Related
-
1988
- 1988-10-12 IT IT8809501A patent/IT1225246B/en active
- 1988-10-19 JP JP63263816A patent/JP2719938B2/en not_active Expired - Fee Related
- 1988-10-20 DE DE3835785A patent/DE3835785C2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038440A (en) * | 2006-08-04 | 2008-02-21 | Tsuchiya Tsco Co Ltd | Spacer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3835785A1 (en) | 1989-05-03 |
| FR2622078A1 (en) | 1989-04-21 |
| FR2622078B1 (en) | 1990-03-09 |
| IT1225246B (en) | 1990-11-02 |
| JP2719938B2 (en) | 1998-02-25 |
| IT8809501A0 (en) | 1988-10-12 |
| DE3835785C2 (en) | 1997-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |