JPH04214179A - Mount structure of furnace wall electrode for dc current arc furnace - Google Patents
Mount structure of furnace wall electrode for dc current arc furnaceInfo
- Publication number
- JPH04214179A JPH04214179A JP2400257A JP40025790A JPH04214179A JP H04214179 A JPH04214179 A JP H04214179A JP 2400257 A JP2400257 A JP 2400257A JP 40025790 A JP40025790 A JP 40025790A JP H04214179 A JPH04214179 A JP H04214179A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- furnace wall
- wall electrode
- gap
- electrode
- 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
- 238000009434 installation Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 239000011819 refractory material Substances 0.000 abstract description 9
- 239000007769 metal material Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 239000012212 insulator Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding 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)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
- Discharge Heating (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、金属材料の溶解、溶融
金属の精錬等に使用される直流アーク炉の炉壁電極に関
するもので、特にその交換部の取付構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace wall electrode of a DC arc furnace used for melting metal materials, refining molten metal, etc., and particularly relates to a mounting structure for a replacement part thereof.
【0002】0002
【従来の技術】溶解、精錬用のアーク炉として、炉内に
装入した溶融金属の上方に配置した電極と、炉底、側壁
等の炉壁に取り付けられた電極との間に電流を流し、金
属材料の溶解、溶融金属の精錬等を行う直流アーク炉が
知られている。この種の直流アーク炉における炉壁電極
は、炉内にある高温の溶融金属からの受熱、供給電流が
通過するときに発生するジュール熱等によって、極めて
過酷な使用雰囲気に晒される。そこで、この雰囲気に耐
え、炉壁電極の耐久性を向上させるため、各種の提案が
行われているが、いずれにしろ炉壁電極は炉の操業の進
行に伴って損耗していき、炉壁電極の取替えを余儀無く
される。[Prior Art] As an arc furnace for melting and refining, an electric current is passed between an electrode placed above the molten metal charged in the furnace and an electrode attached to the furnace wall such as the bottom or side wall of the furnace. 2. Description of the Related Art Direct current arc furnaces are known for melting metal materials, refining molten metal, and the like. The furnace wall electrodes in this type of DC arc furnace are exposed to an extremely harsh operating atmosphere due to heat received from the high-temperature molten metal in the furnace, Joule heat generated when a supplied current passes through the furnace, and the like. Therefore, various proposals have been made to withstand this atmosphere and improve the durability of the furnace wall electrode, but in any case, the furnace wall electrode wears out as the furnace continues to operate, and the furnace wall The electrodes have to be replaced.
【0003】この炉壁電極の取替え構造について、炉壁
電極部を底板を介して立設された陽極ピンと該陽極ピン
周囲に充填する耐火性組成物とを一体成形してカセット
方式とし、炉壁電極の取替え時に、この炉壁電極毎に取
り替えるようにすることによって、従来炉内作業という
劣悪な作業であったスタンプ施工等の電極部の修理、交
換を容易に行う構造が特開平01−128392号公報
に開示されているが、これには次の課題がある。Regarding this furnace wall electrode replacement structure, the furnace wall electrode part is formed into a cassette system by integrally molding an anode pin set up through the bottom plate and a refractory composition filled around the anode pin. Japanese Patent Laid-Open No. 01-128392 discloses a structure in which repair and replacement of the electrode part, such as stamping, which was conventionally an inferior work inside the furnace, can be easily done by replacing each furnace wall electrode when replacing the electrodes. However, this method has the following problems.
【0004】0004
【発明が解決しようとする課題】■陽極(SS材)の周
辺は工場で施工できるが、鋼板枠体の周辺は、いわゆる
現場施工でスタンプするため、炉を冷却しなければなら
ず、時間的損失、熱的損失、冷却による補修部以外の炉
材のクラック等による損失を生じる。■或いは、これら
の損失・損耗を抑えるには炉を冷却せず施工することが
要求されるが、この方法では、鋼板枠体の周辺の耐火物
を炉内からの作業で施工する必要が有るので、高熱部で
の作業となる。■現場施工でのスタンプは、上記のよう
な作業環境であるので、その施工の品質は十分なもので
はなく、スタンプ材の亀裂、剥離が発生し、炉壁電極周
囲の耐火物の損耗が早くなり、その取替え頻度が多くな
り、電気炉の生産性が減少することになる。[Problems to be solved by the invention] ■ The area around the anode (SS material) can be stamped in a factory, but the area around the steel plate frame is stamped on-site, so the furnace must be cooled, which takes time. Loss occurs due to thermal loss, cracks in furnace materials other than the repaired part due to cooling, etc. ■Alternatively, in order to reduce these losses and wear and tear, it is required to construct the furnace without cooling it, but with this method, it is necessary to construct the refractories around the steel plate frame from inside the furnace. Therefore, you will have to work in a hot area. ■Stamps are installed on-site under the working environment described above, so the quality of the work is not sufficient, and the stamp material cracks and peels, and the refractories around the furnace wall electrodes wear out quickly. As a result, the frequency of replacement will increase, and the productivity of the electric furnace will decrease.
【0005】従来の方法である特開平01−12839
2号公報によると、電極ブロックを下の方向に取り外し
たときに炉材充填層が崩れること、または新しい電極ブ
ロックを取り付けたときに電極ブロックと炉材充填層と
の間に製作誤差などにより、必然的に隙間が発生する。
この隙間が発生したままで操業を行った場合は、この隙
間への溶鋼の流入があり、さらに進んで溶鋼が炉底から
流出する。このためこの隙間が発生しないように、電極
ブロック周辺の炉材充填層は電極ブロックを取り付けた
後、現場で炉内からの作業で施工する必要がある。[0005] The conventional method is disclosed in Japanese Patent Application Laid-Open No. 01-12839.
According to Publication No. 2, when the electrode block is removed downward, the furnace material filling layer collapses, or when a new electrode block is installed, due to manufacturing errors between the electrode block and the furnace material filling layer, etc. Gaps inevitably occur. If the operation is continued with this gap remaining, molten steel will flow into this gap, and the molten steel will continue to flow out from the bottom of the furnace. Therefore, in order to prevent this gap from occurring, it is necessary to construct the furnace material filling layer around the electrode block on-site from inside the furnace after the electrode block is installed.
【0006】本発明は上記課題を解決するためのもので
、炉外からだけの作業で炉壁電極の取替えを可能にし、
炉を冷却する必要がなく、短時間に炉壁電極の取替えが
可能になると共に、取替え作業環境を高熱部より解放す
ることのできる直流アーク炉の炉壁電極の取付構造を提
供することを目的とする。[0006] The present invention is intended to solve the above problems, and makes it possible to replace the furnace wall electrode only from outside the furnace.
The purpose of the present invention is to provide a mounting structure for the furnace wall electrode of a DC arc furnace, which does not require cooling the furnace, allows the furnace wall electrode to be replaced in a short time, and allows the replacement work environment to be freed from high-temperature parts. shall be.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するため
の本発明の直流アーク炉の炉壁電極の取付構造は、炉底
板を介して立設された導電性ピン又はビレットの周囲に
、耐火物を充填し、側面がテーパー状に一体成形された
直流アーク炉の炉壁電極を直流アーク炉の炉床に開孔さ
れた炉壁電極の取付孔に取付自在とした直流アーク炉の
炉壁電極の取付構造において、前記炉壁電極の側面と炉
壁電極の取付孔との間に隙間を設け、該隙間に炉外から
耐火物の圧入が可能なノズルを設けたことを特徴とする
。[Means for Solving the Problems] In order to achieve the above object, the mounting structure of the furnace wall electrode of the DC arc furnace of the present invention includes a fireproof A furnace wall of a DC arc furnace in which a furnace wall electrode of a DC arc furnace filled with material and integrally molded with a tapered side surface can be freely attached to a mounting hole of the furnace wall electrode made in the hearth of the DC arc furnace. The electrode attachment structure is characterized in that a gap is provided between the side surface of the furnace wall electrode and the attachment hole of the furnace wall electrode, and a nozzle that can press-fit a refractory from outside the furnace is provided in the gap.
【0008】このように炉壁電極の側面と炉壁電極の取
付孔との間に隙間を設け、該隙間に炉外から耐火物の圧
入が可能なノズルを設けたことにより、炉壁電極の取替
え後前記隙間に炉外からの耐火物の圧入が可能であり、
全ての炉壁電極取替作業が炉外から実施可能となる。[0008] By providing a gap between the side surface of the furnace wall electrode and the attachment hole of the furnace wall electrode, and providing a nozzle that can press-fit the refractory from outside the furnace into the gap, the furnace wall electrode can be easily removed. After replacement, it is possible to press-fit refractories into the gap from outside the furnace,
All furnace wall electrode replacement work can be performed from outside the furnace.
【0009】[0009]
【実施例】図1は本発明の炉壁電極の取付構造断面図、
図2は本発明の炉壁電極の取付構造部の詳細図を示す。
直流アーク炉の炉壁電極2は、図1に示すように、炉床
1に形成した取付孔16に側面がテーパー状の炉壁電極
2が取り付けられ、この炉壁電極2は導電性のピンまた
はビレット3と耐火物4とを施工するための鋼板枠体9
を炉底板5に取り付けた構造よりなっている。この炉壁
電極2は電気炉本体の炉体金物6から突出した取付けフ
ランジ7に絶縁物8を介して取り付けられている。[Example] Figure 1 is a sectional view of the mounting structure of the furnace wall electrode of the present invention.
FIG. 2 shows a detailed view of the mounting structure of the furnace wall electrode of the present invention. As shown in FIG. 1, the furnace wall electrode 2 of the DC arc furnace has a tapered side surface attached to a mounting hole 16 formed in the hearth 1, and this furnace wall electrode 2 is connected to a conductive pin. Or steel plate frame 9 for constructing billet 3 and refractory 4
is attached to the furnace bottom plate 5. This furnace wall electrode 2 is attached via an insulator 8 to a mounting flange 7 protruding from a furnace metal fitting 6 of the electric furnace main body.
【0010】図2はこの部位の取付構造部の詳細を示す
もので、炉体金物6から突出した取付けフランジ7に、
炉壁電極2は炉の外側から取付けボルト11により固設
される。炉体金物6と炉壁電極2とは電気的な絶縁を必
要とするので、それぞれ必要な部位にフランジ間絶縁物
8、フランジ内面絶縁物10、取付けボルト用絶縁物1
2を設置する。FIG. 2 shows the details of the mounting structure of this part.
The furnace wall electrode 2 is fixedly installed from the outside of the furnace with mounting bolts 11. Since the furnace body hardware 6 and the furnace wall electrode 2 require electrical insulation, an inter-flange insulator 8, an inner flange insulator 10, and a mounting bolt insulator 1 are provided at the necessary locations, respectively.
Install 2.
【0011】炉壁電極2を炉体金物6に取り付けた状態
では、炉床1の取外し面15と鋼板枠体9との間には、
隙間14が発生する。この隙間14へは炉の外側の円周
数箇所に設けたノズル13から、耐火物が圧入され、こ
の隙間14が充填される。前記隙間の量は10〜50m
m程度が望ましい。10mmより小さくなると圧入材が
均一に充填されず、また余り大きくなると不経済である
ので、上限は50mmとした。また、この範囲あれば炉
壁電極の製作誤差を吸収する事ができる。さらに、前記
隙間への圧入材の充填をより確実に行うためには、炉壁
電極の取替え時の取付け面15の補修時に、上部の隙間
、即ち図2のa部が極力小さくなるように補修を行えば
よい。When the furnace wall electrode 2 is attached to the furnace metal fittings 6, there is a gap between the removal surface 15 of the hearth 1 and the steel plate frame 9.
A gap 14 occurs. Refractories are press-fitted into this gap 14 from nozzles 13 provided at several points around the circumference outside the furnace, and this gap 14 is filled. The amount of the gap is 10-50m
About m is desirable. If it is smaller than 10 mm, the press-fitting material will not be filled uniformly, and if it is too large, it will be uneconomical, so the upper limit was set to 50 mm. Moreover, within this range, manufacturing errors of the furnace wall electrode can be absorbed. Furthermore, in order to more reliably fill the gap with the press-fitting material, when repairing the mounting surface 15 when replacing the furnace wall electrode, the gap at the top, that is, the part a in FIG. 2, should be repaired to be as small as possible. All you have to do is
【0012】このように炉壁電極2を、炉の外側から電
気炉本体の炉体金物6及び炉床1とにより構成される取
付孔16に取り付け、この取り付け時に炉床1の取外し
面15と鋼板枠体9との間に発生する隙間14に、炉の
外側から耐火物を圧入できるようにしたことで、炉壁電
極2の取替え作業の全てが、炉の外側から可能になった
。尚、前記鋼板枠体9は取替え用の炉壁電極の製作時、
耐火物の充填用ガイドであり、電気炉への炉壁電極取替
え時、取り付けなくてもよい。In this manner, the furnace wall electrode 2 is attached from the outside of the furnace to the attachment hole 16 formed by the furnace metal fittings 6 of the electric furnace main body and the hearth 1, and when attached, the furnace wall electrode 2 is connected to the removal surface 15 of the hearth 1. By making it possible to press-fit a refractory from outside the furnace into the gap 14 that occurs between the furnace wall electrode 2 and the steel plate frame 9, all work for replacing the furnace wall electrode 2 can be done from outside the furnace. Note that the steel plate frame 9 is used when manufacturing a replacement furnace wall electrode.
This is a guide for filling refractories, and does not need to be installed when replacing the furnace wall electrode in an electric furnace.
【0013】以上説明したように、本発明は全て炉外か
らだけの作業で炉壁電極の取替えを可能とし、炉を冷却
する必要がなく、炉壁電極の取替えも短時間に可能とな
り、取替え作業環境を高熱部より解放する事ができた。
しかも炉壁電極の取替え時間は従来の方法に比べ表1に
示す通り約1/3に短縮された。As explained above, the present invention makes it possible to replace the furnace wall electrodes only from outside the furnace, there is no need to cool the furnace, and the furnace wall electrodes can be replaced in a short time. The work environment can be freed from high heat areas. Furthermore, the time required to replace the furnace wall electrodes was reduced to about 1/3 compared to the conventional method, as shown in Table 1.
【0014】[0014]
【表1】[Table 1]
【0015】[0015]
【発明の効果】本発明の採用により炉壁電極の取替え時
、炉の冷却が必要でなくなったので、補修部位以外の炉
材のクラック等が少なくなり、また現場施工でのスタン
プ施工を省いたので、炉壁電極周囲の耐火物の損耗が減
少し、炉壁電極の寿命が向上することにより取替え頻度
の減少となり電気炉の生産性が向上した。[Effects of the invention] By adopting the present invention, there is no need to cool the furnace when replacing the furnace wall electrode, so cracks in the furnace material other than the repaired area are reduced, and stamping on site is eliminated. As a result, the wear and tear of the refractories around the furnace wall electrodes is reduced, and the life of the furnace wall electrodes is increased, which reduces the frequency of replacement and improves the productivity of the electric furnace.
【図1】本発明の炉壁電極の取付構造断面図[Fig. 1] Cross-sectional view of the mounting structure of the furnace wall electrode of the present invention
【図2】本
発明の炉壁電極の取付構造部の詳細図[Fig. 2] Detailed diagram of the mounting structure of the furnace wall electrode of the present invention
1 炉床 2 炉壁電極 3 導電性のピンまたはビレット 4 耐火物 5 炉底板 6 炉体金物 7 取付けフランジ 8 フランジ間絶縁物 9 鋼板枠体 10 フランジ内面絶縁物 11 取付けボルト 12 取付けボルト用絶縁物 13 ノズル 14 隙間 15 取外し面 16 炉壁電極の取付孔 1 Hearth 2 Furnace wall electrode 3 Conductive pin or billet 4 Refractories 5 Hearth bottom plate 6 Furnace hardware 7 Mounting flange 8 Insulator between flanges 9 Steel plate frame 10 Flange inner surface insulation 11 Mounting bolt 12 Insulator for mounting bolts 13 Nozzle 14 Gap 15 Removal surface 16 Furnace wall electrode mounting hole
Claims (1)
又はビレットの周囲に、耐火物を充填し、側面がテーパ
ー状に一体成形された直流アーク炉の炉壁電極を直流ア
ーク炉の炉床に開孔された炉壁電極の取付孔に取付自在
とした直流アーク炉の炉壁電極の取付構造において、前
記炉壁電極の側面と炉壁電極の取付孔との間に隙間を設
け、該隙間に炉外から耐火物の圧入が可能なノズルを設
けたことを特徴とする直流アーク炉の炉壁電極の取付構
造。Claim 1: A furnace wall electrode of a DC arc furnace, which is filled with a refractory and integrally formed with a tapered side surface, is placed around a conductive pin or billet erected through a furnace bottom plate. In the mounting structure of the furnace wall electrode of a DC arc furnace, which can be freely installed in the furnace wall electrode installation hole drilled in the hearth, a gap is provided between the side surface of the furnace wall electrode and the furnace wall electrode installation hole. A mounting structure for a furnace wall electrode of a DC arc furnace, characterized in that a nozzle capable of press-fitting a refractory from outside the furnace is provided in the gap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2400257A JP2515433B2 (en) | 1990-12-03 | 1990-12-03 | Mounting structure of wall electrodes of DC arc furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2400257A JP2515433B2 (en) | 1990-12-03 | 1990-12-03 | Mounting structure of wall electrodes of DC arc furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04214179A true JPH04214179A (en) | 1992-08-05 |
JP2515433B2 JP2515433B2 (en) | 1996-07-10 |
Family
ID=18510169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2400257A Expired - Lifetime JP2515433B2 (en) | 1990-12-03 | 1990-12-03 | Mounting structure of wall electrodes of DC arc furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2515433B2 (en) |
-
1990
- 1990-12-03 JP JP2400257A patent/JP2515433B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2515433B2 (en) | 1996-07-10 |
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Legal Events
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A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960305 |